Role of sonoelastography in non-palpable breast lesions

The purpose of this study was to evaluate the diagnostic utility of sonoelastography in differentiating benign from malignant non-palpable breast lesions. A total of 293 BI-RADS 3–5 (Breast Imaging Reporting And Data System) impalpable breast lesions in 278 women was evaluated with B-mode ultrasound (US) and subsequently with sonoelastography (SE) before performing US-guided biopsy. Among the 293 lesions (size up to 2 cm), 110 (37.5%) were histologically malignant and 183 (62.5%) benign. Lesions that were malignant or showed atypical ductal hyperplasia were referred for surgical excision, as well as 32 benign lesions showing discordance between US/SE results and histology. All other benign lesions had US follow-up at 6/12 months, showing stability. Overall performance of SE was lower than US, with sensitivity and specificity of 80% and 80.9%, respectively, for SE as compared with 95.4% and 87.4% for US. Statistical analysis showed no improvement in the joint use of SE and US over the use of US alone, whose performance, however, was very high in our study. SE is a simple, fast and non-invasive diagnostic method that may be a useful aid to US for less experienced radiologists in the assessment of solid non-palpable breast lesions, especially BI-RADS 3, where specificity was higher (88.7%).     

Imaging of testicular torsion and epididymitis/orchitis: Diagnosis and pitfalls

In this paper, we review the clinical and imaging features of the two most common causes of the acute scrotum, testicular torsion and epididymitis/orchitis. Pertinent anatomy, imaging study techniques and pitfalls in diagnosis are discussed.     

高频超声对睾丸微石症与睾丸肿瘤间的关系初步探讨

目的探讨睾丸微石症与睾丸肿瘤的关系。方法回顾分析2003年1月～2011年12月我院门诊及住院12956例患者的阴囊超声检查资料。参考国外的标准对睾丸微石症(TM)进行分级,将其分为局限型TM(LTM)和典型的TM(CTM),其中又将CTM分为Ⅰ级、Ⅱ级和Ⅲ级。结果①所有患者中共检出睾丸微石症277例,检出率2.14%(277/12956);单侧病变34例(占12.3%),双侧病变243例(87.7%)。LTM有62例(22.4%),CTM型中Ⅰ级92例(33.2%),Ⅱ级68例(24.5%),Ⅲ级55例(19.9%);②检出睾丸肿瘤52例,检出率0.40%(52/12956)。277例睾丸微石症患者中合并睾丸肿瘤19例,发生率6.9%(19/277),而在12679例无睾丸微石症者中仅33例合并睾丸肿瘤,发生率0.3%(33/12679),睾丸微石症患者的睾丸肿瘤发生率明星高于无微石症者(P<0.01)。但不同级别睾丸微石症的睾丸肿瘤发生率差异无统计学意义(P>0.05)。结论睾丸微石症与睾丸肿瘤的发生具有一定的相关性,但不同级别睾丸微石症的睾丸肿瘤发生率无差异。     

Acute testicular torsion in children: the role of sonography in the diagnostic workup

Acute testicular torsion in children is an emergency and has to be diagnosed urgently. D oppler sonography is increasingly used in imaging the acute scrotum. Nevertheless, in uncertain cases, surgical exploration is required. In this study, we attempted to define the role of Doppler sonography in the diagnostic workup of the acutely painful scrotum. All patients admitted between 1999 and 2005 with acute scrotal pain were included. After clinical assessment, patients were imaged by Doppler sonography with a ‘‘high-end’’ instrument. In cases of absent arterial perfusion of the testis in Doppler sonography, surgical exploration was carried out. Patients with unaffected perfusion were followed clinically by ultrasound for up to 2 years. Sixty-one infants and children aged 1 day to 17 years (median: 7.9 years) were included. In 14 cases, sonography demonstrated absent central perfusion, with abnormal parenchymal echogenicity in six. Absence of venous blood flow together with reduction of central arterial perfusion was found in one infant. In these 15 patients, surgical exploration confirmed testicular torsion. Among the other 46 patients, we found four cases with increased testicular perfusion and 27 with increased perfusion of the epididymis. In one infant, a testicular tumour was found sonographically, and orchiectomy confirmed diagnosis of a teratoma. Follow-up examinations of the conservatively treated patients showed good clinical outcome with physiologic central perfusion as well as normal echogenic pattern of both testes. No case of testicular torsion was missed. By means of Doppler sonography, an unequivocal statement regarding testicular perfusion was possible in all cases. The initial Doppler diagnosis was confirmed by operative evaluation and follow-up ultrasound. Testicular torsion can therefore be excluded by correctly performed ultrasound with modern equipment. Patrick Gunther and Jens-Peter Schenk contributed equally to this work     

Testicular microlithiasis: US findings in six pediatric cases and literature review

The aim of this article is to report on six pediatric cases of testicular microlithiasis (TM) and to review literature reports, in order to schedule US and/or other control examinations, particularly when concomitant focal or diffuse alterations of the testicular parenchymal structure are present, considering the possible association of TM with testicular tumors. Six patients (age range 4–12 years) underwent US examination for scrotal trauma (two cases) unilateral cryptorchidism (one case) follow-up after orchidopexy for bilateral cryptorchidism (one case), and varicocele (two cases). Five examinations were performed with high-frequency probes (10/13 MHz) and seven with 5/7.5-MHz frequency transducers. Follow-up US examinations were performed at different times depending on initial clinical indications, presence of underlying disease, and initial US findings. Two of the six patients underwent three US examinations, two patients underwent two US examinations, and the remaining two patients underwent only one US examination. The patients underwent a total of 12 US examinations. Microliths were bilateral in four patients and unilateral in two patients. In these two latter cases, the contralateral testis was, in one case, cryptorchid and could not be evaluated by US; in the other case it was small and hyperechogenic with orchidopexy sequelae. In three cases microliths were distributed throughout the testis. In the remaining three cases they were present in limited areas of parenchyma. As to the importance of microliths, it was defined as mild in three cases and moderate/severe in three cases. Intratubular testicular microlithiasis is a well-proved histological finding (biopsy or autopsy). More recent is the US demonstration of TM with consequent definition of its pattern: usually bilateral hyperechogenic multiple small foci without acoustic shadows with complete or partial extension to the parenchyma. Testicular microlithiasis is a rare finding. Moreover, the pediatric cases reported in the literature are very few. However, the use of high-frequency US transducers (10–13 MHz) has recently allowed an easier demonstration of this disease also in children. Of particular interest is the study of the still-debated association of microliths with other diseases such as neoplasms. Some aspects need further investigation, namely the real incidence of microliths in the healthy population, the incidence of tumors in patients with microliths, the differences between adults and children, and the different types of follow-up at different ages. In pediatric age, if TM represents an isolated sign, patients need non-invasive US follow-up until adult age. Only if TM is in association with focal lesions of testis parenchyma is it mandatory to perform biopsy or surgical treatment. Received: 17 June 1998; Revision received: 26 August 1998; Accepted: 21 September 1998     

Diagnosis of solid breast lesions by elastography 5-point score and strain ratio method

Purpose

To compare the diagnostic performance of 5-point scoring system and strain ratio by sonoelastography in the assessment of solid breast lesions.

Material and methods

One hundred and eighty-seven solid masses in 155 patients were scanned by two-dimensional ultrasonography and sonoelastography. Elasticity scores were determined with a 5-point scoring method, and the strain ratio was based on the comparison of the average strain measured in the lesion with the adjacent breast tissue in the same depth. Pathological results were taken as gold standards to compare the diagnostic efficacy of two methods with clinical diagnostic test and receiver operating characteristic (ROC) curves.

Results

Among 187 lesions, 130 were benign and 57 were malignant. The mean scores (1.62 ± 0.69 vs 4.07 ± 0.26, P < 0.05) and strain ratios (2.06 ± 1.27 vs 6.66 ± 4.62, P < 0.05) were significantly higher of malignant than benign lesions. The area under the curve for the 5-point scoring system and for strain ratio-based elastographic analysis was 0.892 and 0.909, respectively (P > 0.05). For 5-point scoring, sonoelastography had 84.2% sensitivity, 84.6% specificity, 84.5% accuracy, 70.6% positive predictive value and 92.4% negative predictive value. When a cutoff point of 3.06 was used, sensitivity, specificity, accuracy, positive and negative predictive values were 87.7%, 88.5%, 88.2%, 76.9% and 94.3%, respectively for the strain ratio (P > 0.05).

Conclusions

The 5-point scoring system and strain ratio has similar diagnostic performance, and the strain ratio could be more objective to differentiate the masses when those masses were difficult to be judged by using 5-point scoring system in sonoelastographic images.     

原发性睾丸淋巴瘤的CT和MRI评价

目的 分析总结原发性睾丸淋巴瘤的CT和MRI表现以提高对该病的认识.方法 回顾分析8例经手术病理证实的睾丸原发性淋巴瘤的CT和MRI及临床表现,同时复习相关文献.结果 CT表现,肿物边缘清楚,平扫呈均匀等密度,增强扫描中度强化;MRI表现肿块T1WI低、等信号,T2 WI大部分呈稍低信号,部分呈稍高及等信号,DWI序列呈高信号,增强扫描病灶大部分均匀强化,小部分不强化或轻中度不均匀强化.结论 原发性睾丸淋巴瘤的CT和MRI表现有一定的特征性,有较好诊断价值.老年患者出现无痛性的睾丸肿大,要首先考虑到睾丸淋巴瘤的可能性.     

Acute epididymitis in ultrasound: Results of a prospective study with baseline and follow-up investigations in 134 patients

Objectives

To perform a comprehensive follow-up analysis of ultrasonographic scrotal features and associated signs in patients with acute epididymitis.

Methods

Between 2007 and 2012, 134 adults (median age 54 years) with acute epididymitis underwent scrotal ultrasonography and palpation at first presentation and after 2 weeks and 3 months.

Results

At first presentation, 61 patients (45.5%) had hydrocele, 63 (47.0%) concomitant orchitis, and 8 (5.9%) epididymal abscess. Epididymitis was predominantly located in 24 cases (17.9%) in the head, 52 cases (38.8%) in the tail, and 58 cases (43.3%) in both. On the affected side, testicular volume was 16.9 ± 6.8 ml and peak systolic velocity of the testicular artery was 23.7 ± 7.5 cm/s, compared to the healthy side with 12.3 ± 4.4 ml and 9.5 ± 3.6 cm/s respectively (P < 0.001). Concomitant orchitis was associated with hydrocele, testicular enlargement and pain (P < 0.01). Orchiectomy due to secondary testicular infarction was necessary in four cases, while in all other patients ultrasound parameters normalized. Only 16/90 patients (17.8%) showed a persistent epididymal swelling after 3 months.

Conclusions

Common ultrasound features include hydrocele, epididymal enlargement, hyperperfusion, and testicular involvement. Under conservative treatment, ultrasound parameters normalize without evidence of testicular atrophy even in patients with epididymal abscess or concomitant orchitis.     

The impact of share wave elastography in differentiation of hepatic hemangioma from malignant liver tumors in pediatric population

Objective

In children it is crucial to differentiate malignant liver tumors from the most common benign tumor, hepatic hemangiomas since the treatment strategies are quite different. We aimed to evaluate the efficiency of shear wave elastography (SWE) technique in differentiation of malignant hepatic tumors and hepatic hemangiomas.

Methods

Twenty patients with hepatic tumor were included in our study. Two radiologists performed SWE for 13 patients with malignant hepatic tumors including hepatoblastoma (n = 7), hepatocellular carcinoma (n = 3), metastasis (n = 2), embryonal sarcoma (n = 1) and 7 patients with hepatic hemangioma. All of our patients were between the age of 1 and 192 months (mean age: 56.88 months). Receiver operating characteristic analysis was achieved to evaluate the diagnostic accuracy of SWE and to determine the optimal cut-off value in differentiation hepatic hemangioma from malignant hepatic tumors.

Results

The mean SWE values (in kPa) for the first observer were 46.94 (13.8–145) and 22.38 (6.6–49.6) and those for the second observer were 57.91 (11–237) and 23.87 (6.4–57.5), respectively for malignant hepatic tumors and hepatic hemangiomas. The SWE values of malignant hepatic tumors were significantly higher than those of hepatic hemangioma (p = 0.02). The inter-observer agreement was almost perfect (0.81). The area under the receiver operating characteristic curve of SWE for differentiating the hepatic hemangioma from malignant hepatic tumors was 0.77 with a sensitivity of 72.7% and a specificity of 66.7% at a cutoff value of 23.62 with 95% confidence interval.

Conclusion

Shear wave elastography can be helpful in differentiation of malignant hepatic tumors and hepatic hemangioma.     

Ultrasound-guided core-needle biopsy of the testis for focal indeterminate intratesticular lesions

The aim of this study was to evaluate ultrasound (US)-guided core-needle testicular biopsy. Twelve biopsies were performed in eleven patients, under US guidance using disposable 16- or 18-gauge needles, between April 2003 and October 2006. Details were entered on a database and records reviewed 9 months to 3 years after biopsy. Final diagnoses were based on histology of the biopsy, open surgical resection where performed, and interval follow-up. Biopsies were well tolerated and no complications were encountered apart from a single minor testicular haemorrhage. Benign histology was demonstrated on the core-needle samples of six patients and US follow-up was compatible with these diagnoses. Of five patients whose core-needle biopsies yielded malignancy, two patients had primary testicular tumours; both have been treated successfully with orchiectomy and chemotherapy. Three patients with haematological malignancies had successful chemotherapy without orchiectomy; one of these three underwent post-chemotherapy biopsy demonstrating resolution. There are four main clinical scenarios when core-needle testicular biopsy is performed in our institution: (1) lesions with equivocal malignant US features, (2) discrepancy between radiological and clinical findings, (3) suspected malignant process where orchiectomy is unnecessary, e.g. lymphoma, (4) atrophic testes, where it is frequently difficult to differentiate malignancy from the heterogeneous echo pattern.     

MRI对阴囊闭合性损伤的诊断价值

目的 :探讨MRI对阴囊及其内容物闭合性损伤的诊断价值。方法 :对 11例急性、亚急性阴囊闭合性损伤患者 ,行MRSET1WI、FSET2 WI横断面、冠状面、矢状面扫描。结果 :阴囊增大皮肤增厚 9例 ,鞘膜积液 10例 ,白膜下血肿 3例 ,睾丸挫伤出血 8例 ,睾丸白膜破裂 3例 ,外伤后睾丸萎缩 2例。结论 :MRI是检查阴囊闭合性损伤 ,诊断睾丸受伤程度及疗效评价精确的影像学检查方法。     

Differentiation and diagnosis of benign and malignant testicular lesions using 18F-FDG PET/CT

ObjectivesThe purpose of this study was to evaluate the differential diagnostic value of ¹⁸F-fluorodeoxy glucose positron emission tomography/computed tomography (¹⁸F-FDG PET/CT) for benign and malignant testicular lesions.MethodsThe PET/CT scans of 53 patients with testicular lesions confirmed by biopsy or surgical pathology were retrospectively analyzed. There were 32 cases of malignant tumors and 21 cases of benign lesions. Differences in the maximum standardized uptake value (SUVmax) measurements and the SUVmax lesion/background ratios between benign and malignant lesions were analyzed. The diagnostic value of this PET/CT modality for the differential diagnosis of benign versus malignant testicular lesions was calculated.ResultsThe differences in the SUVmax measurements and the SUVmax lesion/background ratios between benign and malignant lesions were statistically significant (SUVmax: Z = −4.295, p = 0.000; SUVmax lesion/background ratio: Z = −5.219, p = 0.000); specifically, both of these indicators were higher in malignant lesions compared to benign lesions. An SUVmax of 3.75 was the optimal cutoff value to differentiate between benign and malignant testicular lesions. The diagnostic sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of this PET/CT modality in the differential diagnosis of benign versus malignant testicular lesions were 90.6%, 80.9%, 86.8%, 87.9%, and 85.0%, respectively.Conclusions¹⁸F-FDG PET/CT can accurately identify benign and malignant testicular lesions.     

Evaluation of real-time qualitative sonoelastography of focal lesions in the parotid and submandibular glands: applications and limitations

Objective

To evaluate qualitative ultrasound elastography for focal salivary gland masses identified during routine clinical practice.

Methods

Sixty-five parotid or submandibular masses in 61 patients underwent real-time qualitative ultrasound elastography and were scored on colour-scaled elastograms in terms of their stiffness relative to adjacent normal salivary parenchyma from ES 1 (soft) to ES 4 (stiff). This was correlated with diagnosis from aspiration cytology or histology.

Results

There were 29 Warthin’s tumours (WTs), 23 pleomorphic adenomas (PAs), 2 adenoid cystic carcinomas, 1 adenosquamous carcinoma, 1 nodal metastasis from nasopharyngeal carcinoma, 1 lymphoma (2 deposits), 3 Kuttner tumours and 4 cases of Kimura’s disease. ES scores showed clustering according to pathological condition. In this respect, PAs were firmer than WTs (P?<?0.004, Fisher’s exact test). Nine, 19, 14 and 17 of the benign masses and 0, 1, 2 and 3 of the malignant masses were ES 1, 2, 3 and 4 respectively. All three primary salivary malignancies were ES 4 compared with 1/29 WTs and 16/23 PAs.

Conclusion

These preliminary findings suggest that qualitative real-time ultrasound elastography, although an ancillary technique to conventional ultrasound in the salivary glands, is likely to have a poor ability to discriminate benign lesions (particularly PAs) from malignant disease.     

小儿睾丸小结石病的超声诊断

目的探讨小儿睾丸小结石病的超声诊断。方法分析11例小儿(年龄1岁～10岁)睾丸小结石病的彩色多普勒超声表现。结果睾丸微小结石症声像图具有特征性:睾丸实质内可见细小、均匀散在分布的点状强回声,无声影。结论高频超声能准确判断及诊断睾丸微小结石症,对于确诊本病的患儿,应定期随访。     

Malignant focal brain lesions. Value of MRS tumour biomarkers in preoperative prediction of grades of malignancy

Purpose

Our aim is to describe the spectrum of proton-MR spectroscopy in malignant focal brain lesions and to detect grade of malignancy using MRS tumor biomarkers.

Materials and methods

87 patients (63 males and 24 females) with focal brain lesion(s) are included in this study. All had a brain tumor recently diagnosed by MRI and had received no previous treatment. They were referred to MRS examination before surgical biopsy and/or resection or radiotherapy.

Results

In malignant brain tumors, average Cho/NAA ratio was 3.3 ± 0.22, Cho/Cr ratio was 2.95 ± 0.21, MI/NAA ratio was 1.5 ± 0.12, MI/Cr was 0.53 ± 0.11 with lower MI levels and higher choline levels in more malignant tumours, lipid/lactate peak was detected in brain metastasis and high grade malignant brain tumors.

Conclusion

Higher Cho/NAA, Cho/Cr and MI/NAA ratios with lower MI/Cr, and high lipid/lactate peak, were most likely to be in high grade malignant brain tumors.     

Combined sonoelastographic scoring and strain ratio in evaluation of breast masses

Aim of the work

To detect the diagnostic performance of the combined use of sonoelastographic scoring and strain ratio in differentiation of benign and malignant breast masses with the histopathology is the standard reference.

Patients and methods

One hundred and seventy-two women with 190 breast masses were enrolled in this prospective study. Conventional US (B-mode and color Doppler US) and sonoelastography (elasticity score “ES” and calculation of strain ratio “SR”) were performed. B-mode images were classified according to the Breast Imaging Recording and Data System. The hardness was determined with 5-point scoring method and SRs of the lesions were calculated. Receiver operating characteristic (ROC) curves were performed and the cutoff point for differentiation of benign and malignant masses was detected.

Results

There was a significant difference (P = 0.02) in the mean SRs between benign and malignant breast masses. The area under the curve (AUC) for combination of ES and SR (0.964) was higher than for ES alone (0.852) and B-mode US (0.823). A cutoff value of 3.6 for the SR allowed the best differentiation of benign and malignant breast lesions.

Conclusion

The combined use of elasticity score and strain ratio of sonoelastography increased the diagnostic performance in distinguishing benign from malignant breast masses.     

彩色多普勒超声对睾丸肿瘤的诊断价值

目的：总结51例睾丸肿瘤的声像图特征。探讨超声对睾丸肿瘤的诊断价值。方法：分析51例经手术后病理证实的睾丸肿瘤的二维及彩色多普勒超声特征。结果：51例睾丸肿瘤中。恶性肿瘤36例(70．58％)，良性肿瘤15例(29．41％)。36例恶性肿瘤中。精原细胞瘤18例(35．29％)，恶性淋巴瘤6例(11．76％)，胚胎瘤、恶性畸胎瘤及内胚窦瘤各3例(各占5．88％)，卵黄囊瘤、间质细胞瘤及胚胎性横纹肌肉瘤各1例(各占1．96％)。15例良性肿瘤中。畸胎瘤8例(15．69％)，皮样囊肿4例(7．84％)，毛细血管瘤2例(3．92％)，良性增生1例(1．96％)。肿瘤呈不均匀等回声或略低回声。部分有散在高回声，其边界清楚。恶性肿瘤血流丰富，良性肿瘤的血流与正常睾丸组织无明显差异。结论：超声检查对皋丸肿瘤的诊断及鉴别很高的价值，能为临床诊断及治疗提供可靠信息。     

Imaging findings in phyllodes tumors of the breast

Purpose

To study the radiological appearance and pathological features of breast phyllodes tumors (PTs), and to enhance the recognition of the tumor.

Materials and methods

Clinical and imaging findings were retrospectively reviewed in 24 women with PTs confirmed by surgical pathology. All of the 24 patients had preoperative MRI and sonography, and 10 had preoperative mammography.

Results

The histologic findings were benign, borderline and malignant PTs in 16.7% (4/24), 45.8% (11/24) and 37.5% (9/24) of cases, respectively. The tumor size (p = 0.001), irregular shape on sonographic imaging (p = 0.039), internal non-enhanced septations (p = 0.009), silt-like changes in enhanced images (p = 0.006) and signal changes from T2-weighted to enhanced images on MRI (p = 0.001) correlated significantly with the histologic grade; the BI-RADS category of the MRI could reflect the PT's histologic grade with a correlation coefficient of 0.440 (p = 0.031). If the category BI-RADS ≥4a was considered to be a suspicious malignant lesion, the diagnostic accuracy of mammography, US and MRI would be 70% (7/10), 62.5% (15/24) and 95.8% (23/24), respectively.

Conclusion

The tumor size and several US and MRI findings can be used to help preoperatively determine the histologic grade of breast PTs. When a patient presents with a progressively enlarging, painless breast mass, MRI should be recommended first.     

Role of power Doppler techniques and ultrasound contrast enhancement in the differential diagnosis of focal breast lesions

The purpose of this article is to demonstrate the diagnostic impact of ultrasound in differentiating focal breast lesions with special regard on power Doppler and US contrast agents. The sonographic evaluation of breast lesions has become a standard procedure during the past 15 years. Especially the improvement of B-mode resolution and the use of high-frequency probes increased the diagnostic value of US. Assuming that the neoangiogenetic vascular architecture of solid breast lesions can be depicted reliably by color Doppler, many authors tried to differentiate between benignity and malignancy using Doppler criteria such as flow and morphologic aspects. Additionally, adjuvant techniques, such as harmonic imaging and new US contrast agents, are meant to be success-promising tools. Whereas the sensitivity and specificity of color Doppler have varied in different studies, prognostic prediction and treatment monitoring seem to be the future areas of application. To evaluate sufficiently flow signals of very small vessels with low flow velocity, the use of contrast-enhancing agents may be necessary. Nevertheless, an indispensable condition for successful Doppler-based assessment of the entity of breast lesions is the standardization of techniques, evaluation, analysis and weighting of the parameters. Electronic Publication     

The role of MR diffusion in differentiation of malignant and benign hepatic focal lesions

Aim

To determine if focal liver masses could be differentiated as benign or malignant by DWI and ADC maps.

Methods and materials

Sixty focal liver lesions were scanned using 1.5 T MRI. DWI was performed with b 0, b 500 and b 1000 gradients with ADC measurements. Comparison of mean ADC values between each benign and malignant lesion was done. Reference standard of diagnosis was obtained by correlating DWI with histopathologic findings and imaging follow-up. The accuracies of DWI and ADC values were assessed with the Student’s t test, and cut-off values were determined with receiver operating characteristic curve analysis.

Results

When ADC value of 1.0 × 10⁻³ mm²/s was used as a threshold value for differentiation of malignant tumors from benign lesions, sensitivity was 90.3%, specificity 78.57% and accuracy 86.7%. The best result was obtained with the use of ADC cut off value (at b 500) of 1.5 × 10⁻³ mm²/s and ADC cut off value (at b 1000) of 1.0 × 10⁻³ mm²/s, with 90.3% sensitivity, 92.86% specificity, 91.1% accuracy, 96.6% positive predictive value and 81.3% negative predictive value.

Conclusion

DWI and ADC map is a useful tool in differential diagnosis of malignant from benign liver lesions.