Lernerfolg durch multimediale Lehre bei Chirurgiestudenten

Background

Teaching surgery to students means covering two main learning fields: theoretical knowledge and practical skills. The objective of this study was to compare a multimedia-based surgical procedure manual to a text-based one in a student population.

Methods

This randomized controlled trial in a pre-post-retention test design was conducted online with the participation of 101 medical students. Subjects studied the performance of a laparoscopic cholecystectomy either in a multimedia-based (MMG) or text-based (TG) presentation. The post-test surveyed the knowledge gain and 3 months later a retention test assessed the sustainability of that knowledge.

Results

The study showed a significant knowledge gain in the intragroup comparison. Regarding the procedural knowledge, the MMG scored significantly higher in Δpost-test with 3.84 (MMG) vs 2.98 (TG) correct answers (p?=?0.040). This finding was confirmed in the retention test. The MMG (7.17) scored overall significantly higher than the TG (6.41) with correct answers (p?=?0.028).

Conclusions

Multimedia-based learning can be regarded as an alternative to text-based learning. Students learn factual knowledge equally well with both devices but the MMG scored higher in procedural and more complex knowledge.     

Does the peritumoral fat signal on MRI exclude malignancy of soft tissue tumor?

Objective

MRI is the most sensitive imaging modality in the staging, surgical planning, and following up of malignant soft tissue tumors. However, the ability of MRI to separate benign from malignant lesions is still of limited value for this purpose. We often observe that benign soft tissue tumors are accompanied by a peritumoral fat signal on MRI. The purpose of this study was to determine the value of the peritumoral fat signal in separating benign from malignant soft tissue tumors.

Materials and methods

We retrospectively reviewed 121 patients with soft tissue tumors (52 men, 69 women; median age 54 years). Two musculoskeletal oncologists reviewed the MRI independently and reported on the presence or absence of a peritumoral fat signal. The sensitivity, specificity, and the positive and negative predictive values of the peritumoral fat signal for the prediction of benignancy of soft tissue tumors were calculated.

Results

Peritumoral fat signals were identified in 54 of 64 (84.3 %) benign and 10 of 57 (17.5 %) malignant tumors (p?Conclusion This study permits the conclusion that the presence of peritumoral fat signals is seemingly an exceptional finding in malignant soft tissue tumors. Observation of this peritumoral fat signal should accordingly influence the management of soft tissue tumors.     

Are upright lateral cervical radiographs in the obtunded trauma patient useful? A retrospective study

Background

The best method for radiographic "clearance" of the cervical spine in obtunded patients prior to removal of cervical immobilization devices remains debated. Dynamic radiographs or MRI are thought to demonstrate unstable injuries, but can be expensive and cumbersome to obtain. An upright lateral cervical radiograph (ULCR) was performed in selected patients to investigate whether this study could provide this same information, to enable removal of cervical immobilization devices in the multiple trauma patient.

Methods

We retrospectively reviewed our experience with ULCR in 683 blunt trauma victims who presented over a 3-year period, with either a Glasgow Coma Score <13 or who were intubated at the time of presentation.

Results

ULCR was performed in 163 patients. Seven patients had studies interpreted to be abnormal, of which six were also abnormal, by either CT or MRI. The seventh patient's only abnormality was soft tissue swelling; MRI was otherwise normal. Six patients had ULCR interpreted as normal, but had abnormalities on either CT or MRI. None of the missed injuries required surgical stabilization, although one had a vertebral artery injury demonstrated on subsequent angiography. ULCR had an apparent sensitivity of 45.5% and specificity of 71.4%.

Conclusion

ULCR are inferior to both CT and MRI in the detection of cervical injury in patients with normal plain radiographs. We therefore cannot recommend the use of ULCR in the obtunded trauma patient.     

Three-Tesla dynamic contrast-enhanced MRI: a critical assessment of its use for differentiation of renal lesion subtypes

Purpose

To evaluate the ability of dynamic contrast-enhanced (DCE) 3-T MRI for preoperative differentiation between benign and malignant renal tumors and RCC subtypes.

Methods

Sixty consecutive patients undergoing preoperative DCE 3-T MRI of the kidney were evaluated in this retrospective IRB-approved evaluation. Fifty-four malignant tumors and 17 benign tumors upon surgical verification were included. Relative enhancement values of complete lesions and the most enhancing part of the lesions (hotspot) were measured using four repetitions: precontrast, arterial, venous, and delayed.

Results

Mean relative enhancement patterns between malignant and benign lesions did not differ significantly during any postcontrast phase (p > 0.05). The highest mean enhancement during all postcontrast phases was identified in clear cell RCC followed by chromophobic RCC. The enhancement pattern in papillary RCC was significantly less than that of non-papillary RCC lesions. Arterial enhancement was an independent predictor for RCC subtypes (papillary vs. non-papillary, p = 0.008). The diagnostic accuracy for differentiation of papillary from non-papillary RCC based on ROC analysis was 76.4 % [95 % CI 62.2–87.2 %]; p < 0.0001.

Conclusions

Dynamic contrast-enhanced MRI at 3 T showed intermediate diagnostic capability for differentiation between papillary and non-papillary RCC subtypes but could not differentiate between benign and malignant renal lesions.     

Calcifications on Mammogram Do Not Correlate with Tumor Size After Neoadjuvant Chemotherapy

Introduction

Calcifications can be indicative of malignancy, but calcifications also can be a byproduct of necrotic tissue as cancer cells die. Current treatment regimens require excision of calcifications. The objective of this study was to examine the correlation between the extent of calcification on mammography and actual tumor size after neoadjuvant chemotherapy (NAC) as well as magnetic resonance imaging (MRI) for comparison.

Methods

We retrospectively reviewed all patients at the University of California, San Diego, who underwent NAC for breast cancer between 2007 and 2013. Pearson correlation coefficients were computed between breast imaging and pathological measurements.

Results

There were 136 patients total. Average age was 51 years. Fifty-three patients had calcifications on imaging (calc+); 83 did not (calc?). In the calc? group, extent of disease measured by mammogram (MMG) and MRI correlated moderately well with pathological tumor size (0.46 and 0.48, p = not significant). In the calc+ group, MRI was more likely to correlate with pathology than MMG (0.55 vs. ?0.12, p = 0.01). Twenty-five calc+ patients had increased calcification after NAC; six of these had complete pathologic response. MRI correlated better with tumor size on pathology in patients with anti-HER2neu-based regimens than in patients with cytotoxic chemotherapy-alone regimens (0.88 vs. 0.4, p = 0.0001). MRI also is more accurate at predicting pathological tumor size in patients with triple negative disease (p = 0.002).

Conclusions

Magnetic resonance imaging correlated well while MMG calcification measurements correlated poorly with tumor size on final pathology. Extent of calcifications on diagnostic mammography may not be accurate in preoperative evaluation of breast cancers after NAC.     

Impact of Preoperative Breast MRI on Surgical Decision Making and Clinical Outcomes: A Systematic Review

Background

Preoperative magnetic resonance imaging (MRI) is increasingly used in the workup of breast cancer patients and could lead to changes in surgical management. It is unclear how the information gained from MRI studies affects surgical decision making and influences clinical outcomes. These issues are addressed in this review.

Methods

PubMed database searches were performed to retrieve and analyze respective original research and review articles on preoperative MRI in the evaluation of breast cancer patients.

Results

Preoperative MRI is a highly sensitive but nonspecific method that leads to changes in surgical management with increased numbers of more extended surgical interventions. It appears that a relatively large proportion of MRI-driven changes in surgical management result in overtreatment without conclusively proven beneficial effects on such clinical outcomes as decrease in reoperation rates or improved patient survival.

Conclusions

Thus, routine use of supplementary preoperative breast MRI should be discouraged until compelling evidence of its effectiveness is available.     

Nodular giant cell tumour of the tendon sheath of the hand: analysis of eighty-four cases—diagnostic decisions and outcome

Introduction

The giant cell tumour of the tendon sheath (GCTTS) of the hand is a benign tumour of unknown origin. The clinical diagnosis is supported by preoperative imaging. But the ideal imaging methods necessary for the diagnosis, preoperative planning and total tumour resection are still debated. Standard treatment is surgical resection with histological confirmation.

Methods

We followed up 84 patients who were operated upon for a histologically confirmed nodular type GCTTS for an average of 4.7 years (range four to eight). The preoperative symptoms and radiological findings of X-ray, ultrasound and MRI were reviewed and the surgeon asked for their impact on the surgical procedure.

Results

The average age at operation was 50.9 years, 65.5 % of the patients were female and 61.9 % of the lesions were located on the palmar aspect. Most tumours were found on the first three fingers. Two patients had tumours at two separate sites (2.4 %). After an average follow up of 31.5 months two recurrences were observed (2.4 %). In addition to X-ray and ultrasound, the preoperative findings of the MRI had no influence on the surgical procedure.

Conclusion

Our data on the nodular GCTTS are in accordance with published data concerning the age distribution, gender distribution, and localisation. No soft-tissue imaging method is superior for the diagnosis of nodular GCTTS or for the preoperative planning. A preoperative MRI may not be necessary as clinical and ultrasound examination are sufficient. To exclude bony erosions, a preoperative X-ray is necessary.     

Combined use of modified Alvarado score and USG in decreasing negative appendicectomy rate

Introduction

Appendicitis is notorious in its ability to simulate other conditions and in the frequency it can be mimicked by other pathologies. Despite extraordinary advances in modern radiography imaging and diagnostic laboratory investigations the accurate diagnosis of acute appendicitis remains an enigmatic challenge. Of the various commonly used diagnostic aids for appendicitis, no single test can reduce the rate of negative appendicectomy to zero.

Materials and methods

Fifty admitted cases of suspected appendicitis were subjected to ultrasonography (USG). All the patients were scored out of 9 according to modified Alvarado score. A treatment plan was devised according to which patients with modified Alvarado score ≥7 underwent immediate appendicectomy even if USG was negative for appendicitis and patients with score <7 underwent appendicectomy if USG was positive for appendicitis.

Result

84.3% of males and 44.4% of females admitted as case of suspected appendicitis had confirmed appendicitis. Due to high sensitivity (97.14%) and accuracy (92%) of our diagnostic approach, 85.71% cases of appendicitis were diagnosed in early stage, with only 8.57% perforation and abscess rate, leading to post appendicectomy complication rate of only 5.14% in our study (one wound infection and one urinary retention). We could achieve low negative appendicectomy rate of 7.14% in males and 11.11% in females and overall 8.11% in our study.

Conclusion

Combined use of modified Alvarado score and high frequency USG not only reduces negative appendicectomy rate but also reduces morbidity and postoperative complications.     

Standardisierung des multiparametrischen 3-T-MRT zur zielgerichteten Biopsie der Prostata

Background

The use of multi-parametric MRI and MRI-guided biopsy for the detection of prostate cancer is rapidly increasing. This is a pilot study to evaluate the consensus-based international MRI scoring system as decision criterion for targeted MRI-guided prostate biopsy.

Material and methods

After a multi-parametric 3-T MRI (T2-weighted imaging, diffusion-weighted imaging, and dynamic contrast-enhanced MRI) in 23 consecutive patients a total of 47 lesions were scored according to a 5-point scale for each MRI sequence. A total score of ≥10 points was considered to be suspicious for prostate cancer. All 47 lesions were histologically assessed after MRI-guided biopsy.

Results

At the cut-off score of 10 points, sensitivity, specificity, negative predictive value and positive predictive value of multi-parametric MRI were 94.1, 43.3, 92.9 and 48.5%, respectively.

Conclusions

A standardised scoring of lesions on multi-parametric MRI is feasible. The cut-off value leads to excellent values for sensitivity and negative predictive value. The values for specificity and positive predictive value are modest. Lesions with a total score <10 points are very unlikely to be malignant.     

Therapie von malignen Tumoren mit Infiltration der V. cava

Background

Because of high surgical risk, invasion of the vena cava by malignant tumors is generally considered an absolute contraindication for surgery. However, radical surgical treatment may be beneficial for selected patients. This study was performed to evaluate our experiences with resection of the vena cava for malignant tumors.

Patients and methods

A total of 41 patients underwent surgical treatment for malignant tumors invading the vena cava. Prosthetic repair was performed in 14 patients using a PTFE graft. Relevant outcome parameters were examined.

Results

The operative mortality rate was 7%. Minor complications occurred in 13 patients. The graft patency rate was 86%, and there was no graft-related postoperative morbidity. The 1-, 3-, and 5-year survival rates were 76%, 33%, and 21%, respectively, with a median survival of 28 months. Complete resection (R0) and the absence of cardiopulmonary risk factors had a significant positive effect on survival.

Conclusions

Radical resection of the vena cava is a feasible procedure in highly selected patients, with tolerable morbidity and mortality and acceptable survival rates, especially in patients with complete resection of the tumor.     

Early scaphoid fractures are better diagnosed with ultrasonography than X-rays: A prospective study over 114 patients

Purpose

Wrist has a complex anatomy and undergoes complex injuries. Scaphoid fracture is one of such injuries. It is the most common fracture in carpal bone. Most of the scaphoid fractures are missed on initial X-rays. Magnetic resonance imaging (MRI) is considered as a gold standard for diagnosing scaphoid fractures. Ultrasonography (USG) is emerging as a good alternative to make an early diagnosis of scaphoid fractures. Our aim is to throw light upon the role of USG in detection of scaphoid fractures.

Epidural abscess associated with pyogenic spondylodiscitis of the lumbar spine; evaluation of a new MRI staging classification and imaging findings as indicators of surgical management: a retrospective study of 37 patients

Introduction

The aim of this study was to review the patients with lumbar epidural abscess in terms of neurological morbidity, therapeutic outcome, and prognosis, while assessing the usefulness of a new MRI staging classification and specific imaging findings as indicators for surgical management.

Materials and methods

We reviewed 37 patients who sustained epidural abscess associated with pyogenic spondylodiscitis of the lumbar spine. Ten patients were treated conservatively, while 27 required urgent or elective surgical drainage. We studied patients with respect to symptomatology, Frankel-American Spinal Injury Association (ASIA) scale evaluation and a new proposed system of MRI staging of pyogenic spondylodiscitis (stages I–V).

Results

Of the 37 patients with stage IV and V MRI lesions, 13 (35%) had septicemia and 8 (22%) presented with Frankel-ASIA scale C-D neurological status. All cases with ringlike enhancement on gadolinium-enhanced MRI in the epidural abscess lesions were treated surgically. Progression of local kyphosis and loss of intervertebral disk height were significantly prevented in the surgical group (P < 0.05). Improvements of neurological status and laboratory data were better in the surgical group than the conservative group (P < 0.05), with significantly short hospital stay (P < 0.05).

Discussion

Epidural abscess associated with pyogenic spondylodiscitis presents with various neurological symptoms. In addition to assessment of progression by clinical symptomatology, modified neurological Frankel-ASIA scaling and the currently proposed MRI staging regimen may help to consider the timing of surgical intervention. In the acute, subacute or acute-on-chronic phase and the ringlike enhancement pattern of epidural abscess on gadolinium-enhanced MRI may be an indicator for surgery.     

Duodenal Duplication Cyst: A Potentially Malignant Disease

Background

Duodenal duplication cysts constitute a rare congenital anomaly of the gastrointestinal tract. A recent meta-analysis of the literature between 1999 and 2009 reported a total of 47 cases of duodenal duplication cysts.1 These abnormalities are mostly diagnosed in infancy and childhood. In rare cases, they can remain asymptomatic until adulthood, and 38?% of patients are diagnosed after age 20?years.1 ^, 2 Duodenal duplication cysts are generally benign lesions; nevertheless, three cases of malignant tumours arising inside have been reported.3 ^?C 5

Methods

In this multimedia article, we illustrated the case of an 18?year-old female patient presenting with recurrent episodes of mild pancreatitis. MRI revealed a cystic structure measuring 2.5?cm in diameter located in the duodenal wall next to the papilla of Vater. Endoscopic ultrasound showed a cystic lesion cephalad to the papilla, protruding into the duodenal lumen. Endoscopic retrograde cholangiopancreatography was not feasible due to the dislocation of the papilla, whose macroscopic aspect was normal. To further elucidate the anatomical relations, 3D reconstruction of the MRI images was performed. There was neither dilatation of the biliary tract nor a visible communication between the common bile duct and the cystic structure. The pancreatic duct also was at distance. Those findings were suggestive of a duodenal duplication. Nevertheless, the differential diagnosis6 of a choledochocele (Todani III) could not be formally excluded. Indication for surgical resection was symptomatic disease in a context of potential malignancy.

Results

By right subcostal incision (video), surgical exploration revealed a soft tissue mass palpable at the second portion of the duodenum. Following duodenotomy, the mucosa was incised cephalad to the papilla of Vater, which could previously be localized by methylene blue injection by a catheter inserted into the cystic duct. The cystic structure was dissected and no communication between the cyst and the biliary tract was individualized. The final diagnosis was made by histological examination showing duodenal duplication. There was neither heterotopic gastric mucosa nor excreto-biliary epithelial layer. There were no signs of malignancy. The postoperative course was marked by hematemesis externalised by the nasogastric tube. We reintervened at postoperative day 2 to ensure hemostasis. A clot was removed from the area of duodenal mucosa without any visible active bleeding. Further recovery was uneventful; the patient was discharged at postoperative day 10 and is actually asymptomatic.

Discussion

The ideal treatment of duodenal duplication cysts is complete surgical resection.7 Due to proximity to the bilio-pancreatic duct, total resection sometimes requires pancreaticoduodenectomy. This major surgical procedure entails the disadvantages of high morbidity and mortality with poor quality of life. In our opinion, this procedure should remain an ultimate option. Less invasive approaches have been proposed, including partial resection or internal derivation.7 Marsupialization is a surgical approach that has been accomplished even endoscopically.1 Nevertheless, these techniques do not provide total resection and leave the risk of degenerescence. As cases of malignancy are reported, we decided to realize a complete surgical excision of the lesion. Three-dimensional reconstruction of the biliary anatomy is an innovative procedure, which allowed us to show the absence of any communication between the cyst and either the common bile duct or the pancreatic duct.8 So, the surgical approach could be specified preoperatively ensuring the integrity of the common bile duct. Duplication cysts could be connected to the pancreaticobiliary ducts in about 29?%.1 Subsequent realization of a total surgical excision combined the advantages of complete resection with minimal invasiveness.

Conclusions

For relieving symptoms and preventing further complications, such as pancreatitis or malignant transformation, surgical resection of duodenal duplication cysts is indicated. In cases of difficulties to individualize the neighboring anatomical structures preoperatively, 3D reconstruction is a helpful approach to determine the surgical strategy. Enucleation allows a total excision while minimizing the adverse effects and therefore it is our treatment of choice for duodenal duplication cysts without communication.     

Improved performance of SPECT-CT In-111 capromab pendetide by correlation with diffusion-weighted magnetic resonance imaging for identifying metastatic pelvic lymphadenopathy in prostate cancer

Purpose

To preliminarily evaluate the potential for an improvement in diagnostic performance by a combined interpretation of In-111 capromab pendetide single photon emission computed tomography (SPECT) including computed tomography (CT) image fusion with magnetic resonance diffusion-weighted imaging (MR-DWI) for identifying prostate cancer in pelvic lymph nodes thru correlation with histopathology.

Materials and methods

This institutional approved, retrospective study identified patients with available histopathology of lymph nodes removed at the time of radical prostatectomy and who had undergone staging with In-111 capromab pendetide SPECT-CT and/or pelvic MRI (including DWI). The performance of In-111 capromab pendetide SPECT for identifying malignant lymph nodes was assessed. Subsequently, a combined reading of In-111 capromab pendetide SPECT and prostate MRI with DWI was performed and the performance assessed.

Results

18 patients underwent In-111 capromab pendetide SPECT-CT. Of these, 12 patients had also undergone imaging with MR-DWI. In-111 capromab pendetide SPECT-CT had a sensitivity of 40.0 % and specificity of 96.7 % for identification of malignant lymph nodes. However, In-111 capromab pendetide SPECT-CT combined with MRI with DWI had a sensitivity of 88.9 % and specificity of 98.5 %.

Conclusions

The addition of MR-DWI to the interpretation of In-111 capromab pendetide SPECT-CT may increase the sensitivity for detecting malignant lymph nodes in prostate cancer. Future prospective evaluation of combined In-111 capromab pendetide SPECT-CT and MR-DWI is indicated and may improve clinical evaluation of nodal disease in prostate cancer.     

Effect of MRI on the Management of Ductal Carcinoma In Situ of the Breast

Introduction

The accuracy of breast magnetic resonance imaging (MRI) for detection of ductal carcinoma in situ (DCIS) has prompted recommendations for its routine preoperative use, but its clinical benefit is debated. We reviewed our experience with MRI in DCIS patients to assess the utility of MRI for surgical planning.

Methods

DCIS patients (2008–2010) were identified through a prospectively maintained database and grouped into MRI and no-MRI groups. The rates of additional biopsies, altered surgical management, and reoperation were compared. Additionally, DCIS size ascertained by mammography, MRI, and final pathology was compared.

Results:

Of 352 DCIS patients, 217 received MRI and 135 did not. The type of initial operation and number of reoperations were similar between the two groups, but successful breast conservation was more frequent in the no-MRI group (p = 0.06). The additional biopsy rate was 38 % in the MRI group versus 7 % in the no-MRI group; ≥2 additional biopsies were performed in 18 % of the MRI group and 2 % of the no-MRI group (p < 0.0001). These yielded a cancer diagnosis in 26 % of MRI and 33 % of no-MRI patients (p = 0.73). MRI was not superior to mammogram in detecting size of DCIS lesions preoperatively; 52 % of mammograms were accurate (within 1 cm) compared with 41 % of MRIs.

Conclusions

DCIS patients who undergo preoperative breast MRI are far more likely to undergo additional biopsies. Unless these can be demonstrated to lead to improved long-term outcomes, the utility of routine preoperative MRI in DCIS patients remains questionable.     

The Role of Tumor Markers in the Surgical Approach of Ovarian Masses in Pediatric Age: A 10-Year Study and a Literature Review

Purpose

The purpose of this study was to detect the role of serum tumor markers in the differential diagnosis and in the choice of the surgical treatment of ovarian lesions in pediatric age.

Methods

We retrospectively reviewed medical charts of all pediatric girls operated in two pediatric centers during a 10-year period. The following features were analyzed: age at the moment of presentation, symptoms, diagnostic studies, surgical approach, pathological findings, and, in particular, serum tumor markers. Also, a literature review and statistical analysis (??² test) concerning the increase of different tumor markers in benign and malignant ovarian lesions were related to the study.

Results

A total of 120 children with 127 ovarian masses (7 with bilateral pathologies) were reviewed. Pathology showed 61 nonneoplastic lesions (48%), 54 benign tumors (42.5%), 5 malignant tumors (4%), and 7 torsed normal ovaries (5.5%). The evaluation of serum tumor markers was performed in 106 cases and was positive in 16 (15.1%): in all of the 5 cases (100%) of malignant neoplastic lesions and in 11 (20.4%) benign neoplastic ones. The literature review confirmed these data, and statistical analysis highlighted them as significant values.

Conclusions

The role of tumor markers is still controversial. This is the reason why, before considering a radical treatment, we suggest caution to optimize future fertility.     

Image-guided laparoscopic surgery in an open MRI operating theater

Background

The recent development of open magnetic resonance imaging (MRI) has provided an opportunity for the next stage of image-guided surgical and interventional procedures. The purpose of this study was to evaluate the feasibility of laparoscopic surgery under the pneumoperitoneum with the system of an open MRI operating theater.

Methods

Five patients underwent laparoscopic surgery with a real-time augmented reality navigation system that we previously developed in a horizontal-type 0.4-T open MRI operating theater.

Results

All procedures were performed in an open MRI operating theater. During the operations, the laparoscopic monitor clearly showed the augmented reality models of the intraperitoneal structures, such as the common bile ducts and the urinary bladder, as well as the proper positions of the prosthesis. The navigation frame rate was 8 frames per min. The mean fiducial registration error was 6.88 ± 6.18 mm in navigated cases. We were able to use magnetic resonance–incompatible surgical instruments out of the 5-Gs restriction area, as well as conventional laparoscopic surgery, and we developed a real-time augmented reality navigation system using open MRI.

Conclusions

Laparoscopic surgery with our real-time augmented reality navigation system in the open MRI operating theater is a feasible option.     

Utility of MRI for diagnosing complete tears of the collateral ligaments of the metacarpophalangeal joints of the lesser digits

Background

MRI has been shown to be highly accurate in assessing collateral ligament injuries of the metacarpophalangeal joint (MPJ) of the thumb. The purpose of this study is to evaluate the accuracy of MRI for diagnosing collateral ligament tears of the MPJ of the fingers. Our hypothesis is that MRI would accurately detect complete tears of collateral ligaments of the lesser digit MPJs.

Methods

We retrospectively evaluated 22 digits in 20 patients undergoing finger MPJ collateral ligament repair. All patients had preoperative MRI scans. The findings on preoperative imaging studies were compared to the intraoperative findings.

Results

All patients had surgically confirmed complete tears of the collateral ligament in question. In 8 of 22 MRI scans (36 %), the preoperative imaging study was inaccurate. Of these eight patients, MRI was interpreted as no tear in one and a partial tear in seven. The sensitivity of MRI for diagnosing a complete tear was 64 %. In all three digits in which 3-T MRI scanning was utilized and documented, the preoperative imaging results did not correlate with the intraoperative findings.

Conclusions

Although MRI can be considered a useful adjunct to evaluating patients with collateral ligament injuries of the fingers, the sensitivity is poor and the imaging results can underestimate the extent of injury. In light of this, the emphasis for determining appropriate course of treatment remains on history and mechanism of injury, physical examination, and patient disability.