Are Repeat Biopsies Required in Men with PSA Levels ≤4 ng/ml? A Multiinstitutional Prospective European Study

OBJECTIVES: Pathological and biochemical features of prostate cancers detected on repeat biopsies in men with total PSA level between 2.0 and 4 ng/ml were evaluated and compared to those cancers detected on first biopsy. METHODS: 315 men with PSA level between 2.0 and 4 ng/ml underwent transrectal ultrasound guided sextant biopsy and two additional transition zone biopsies (Octant Biopsy). All subjects whose biopsy samples were negative for prostate cancer underwent a repeat biopsy after 6 weeks. Those with clinically localized cancers were offered surgery or radiation therapy. Pathological and clinical features of patients diagnosed with prostate cancer on initial and repeat biopsy were compared. RESULTS: Cancer detection rates on first and second biopsy were 24% (75/315) and 13% (29/224), respectively. Overall, of patients with clinically localized disease (83% of cancers detected), 87% underwent radical prostatectomy, 11% opted for radiation therapy and 2% opted for watchful waiting. Cancers found in the first biopsy group were more multifocal (p = 0.01) while cancers found on second biopsy were more located in the apical-dorsal region (p = 0.003). No significant differences were noted with respect to extracapsular extension, seminal vesical invasion, positive margins, final pathological stage, Gleason score, percentage Gleason grade 4/5, serum PSA and patient age between first and second biopsy. CONCLUSIONS: With an octant biopsy regime, biochemical and pathological features of cancers detected on initial and repeat biopsy in the PSA range 2.0 to 4 ng/ml are comparable in terms of PSA, grade, stage and cancer volume suggesting identical cancer characteristics, thus advocating for a repeat prostate biopsy in case of a negative finding on initial biopsy.     

The roles of HRCT and clinical parameters in assessing activity of suspected smear negative pulmonary tuberculosis

BACKGROUND: Smear-negative pulmonary tuberculosis (SNPTB) constitutes a major problem in countries with a moderate or high TB prevalence. The value of high-resolution computed tomography (HRCT), chest x-ray and other clinical findings in determining activity of SNPTB were investigated. METHODS: The study population consisted of 85 patients with suspected SNPTB, of whom 52 were confirmed as active pulmonary TB according to either culture positivity for Mycobacteriun tuberculosis or demonstration of caseous granulomatous inflammation. The remaining 33 patients accepted inactive TB sequel. RESULTS: Cough and expectoration were significantly frequent in inactive group whereas chest pain was detected higher in active patients. Sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy of HRCT in detecting disease activity were 88, 88, 92, 83 and 88%, respectively. Centrilobular nodules, other non-calcified nodules, consolidation and cavity were significantly higher on HRCT in active group. Chest x-ray scores that were graded 1 to 3 showed a linear trend for the disease activity. CONCLUSIONS: HRCT has good diagnostic value in detecting activity of SNPTB, and some clinical findings may help in predicting the activity.     

Is pneumoperitoneum harmful during intra-abdominal hemorrhage in rats?

BACKGROUND: Laparoscopic surgical interventions are being used in trauma patients for diagnostic and therapeutic purposes, but there are limited studies on this subject. The effect of pneumoperitoneum during intra-abdominal hemorrhage has not been elucidated. The aim of this study was to investigate the hemodynamic, respiratory, and renal effects of pneumoperitoneum in the splenic injury/ hemorrhagic shock model in rats. MATERIAL AND METHODS: In this study, 80 anesthetized Wistar male rats (294.5 +/- 31.2 g) were randomized into 2 main groups: nontraumatized (group A) and traumatized (group B). After initial preparation and monitoring, each group was divided according to the degree of pneumoperitoneum. The nontraumatized subgroups were A1, sham-operated; A2, 4-8 mm Hg; A3, 9-13 mm Hg; and A4, 14-18 mm Hg. The traumatized subgroups were B1, splenic injury without pneumoperitoneum; B2, B3, and B4, splenic injury with pneumoperitoneum at 4-8 mm Hg, 9-13 mm Hg, and 14-18 mm Hg, respectively. Mean arterial pressure, heart rate, and respiratory rate were monitored continuously. Blood samples were obtained for hemoglobin, hematocrit, arterial blood gases, and biochemical analyses. Twenty-four hour urine output was collected. RESULTS: In group B4, pH, pCO2, and HCO3 levels were lower than in all other groups, while pCO2 and base deficit levels were significantly higher (P < 0.05). Both blood and urine analysis results showed that 24-hour urine output and the glomerular filtration rate of groups A4 and B4 were significantly lower (P < 0.05), while urinary osmolarity and fractional sodium excretion levels were significantly higher (P < 0.05). CONCLUSION: High-pressure pneumoperitoneum in splenically traumatized rats amplifies acidosis, decreases urine output, decreases glomerular filtration rate, and increases urinary osmolarity and fractional sodium excretion significantly.     

Complications of intestinal milking: experimental model

BACKGROUND: Intestinal milking is a frequently used method in abdominal surgery for various purposes; although it is frequently used for eliminating distension, moving faeces, bezoar or other foreign objects proximal or distal, there are no experimental or prospective studies in the surgical literature with respect to complications of the method. The purpose of the present study was to investigate complications of the milking process in an experimental model. METHODS: Forty-four outbred, 8-month old Wistar albino male rats with weights ranging between 195 and 225 g were used. Four rats were used for preliminary study. The other 40 rats were divided into two equal groups. In the study group (n = 20), a plastic sphere, 3 mm in diameter was sent to the stomach via oro-gastric tubes. This sphere was then moved into the cecum by milking. In the control group rats (n = 20) the small intestines were manipulated at 1-cm intervals but milking was not performed. RESULTS: In the study group six rats (30%) developed grade 1, 11 rats (55%) developed grade 2, and three rats (15%) developed grade 3 peritoneal adhesion. In the control group, 18 rats (90%) had no adhesions and only two rats (10%) developed grade 1 adhesion (chi(2) = 34, P < 0.0001). In the study group, four rats (20%) had small bowel obstruction, whereas no rats in the control group developed small bowel obstruction (Fisher's P > 0.05). Peritoneal smear culture was positive in 11 rats (55%) in the study group, whereas it was positive in two rats (10%) in the control group (Fisher's P < 0.01). CONCLUSIONS: Intestinal milking is a process that can cause severe peritoneal adhesions and peritoneal contamination, which may lead to small bowel obstruction. Avoiding milking to the extent possible in eliminating distension intraluminal material that may cause obstruction, and preferring alternative methods is important for reducing postoperative morbidity.     

Anatomical dimensions of anterior bundle of ulnar collateral ligament and its role in elbow stability

OBJECTIVE: To study the anatomical dimensions of the anterior bundle of ulnar collateral ligament and its role in elbow instability. METHODS: We studied 20 elbows of 10 cadavers. Anterior bundle of ulnar collateral ligament was dissected in all elbows and its anatomical length and width were measured. After measuring it, we assessed the role of the anterior bundle of ulnar collateral ligament in the medial elbow joint stability, with the capsule, the radial head and anterior bundle of ulnar collateral ligament being cut. RESULTS: The mean right length of the anterior bundle of ulnar collateral ligament was 21.10 +/- 6.29 mm and the mean left length was 21.70 +/- 5.31 mm. The mean right width of the anterior bundle of ulnar collateral ligament was 12.70 +/- 2.79 mm and the mean left width was 13.90 +/- 2.37 mm. Anterior bundle of ulnar collateral ligament was found to be the main stabilizer of the valgus stress. The anterior capsule and the radial head also make contributions to this stability. However, when anterior bundle of ulnar collateral ligament is cut, the radial head and the anterior capsule fails to maintain the stability against valgus stress. CONCLUSIONS: The anatomical dimensions of the anterior bundle of ulnar collateral ligament are important for a surgeon when graft is used in reconstructing this ligament. Our study is an initiator of this topic and we believe that with larger series, more reliable anatomical measurements can be obtained. We also showed that the anterior bundle of ulnar collateral ligament is the main medial stabilizer of the elbow joint.     

Endoscopic seminal vesicle stone removal

Seminal vesicle stones are extremely rare, and few cases have been reported. Treatment requires removal of the stone, generally through an open vesiculectomy. A 31-year-old man presented with perineal pain, painful ejaculation, and infertility of several years' duration. Multiple stones in the seminal vesicle duct system were diagnosed by radiologic examination. We treated the patient by seminal vesicle endoscopic stone removal, thereby obviating organ loss. The composition of the stones was whewellite. To our knowledge, this approach has not been previously reported, and our result may be encouraging for treatment of such pathologic conditions of the seminal vesicles.     

End-to-side nerve coaptation: is an additional proximal coaptation useful when available?

The aim of this experimental study was to evaluate the effects of end-to-side coaptation of the proximal end of a severed nerve to the same intact nerve, in addition to traditional end-to-side coaptation of the distal end, with an aim to use the intact nerve as a nerve conduit in a rat model and to compare the functional and histologic results of this modality to those obtained after nerve grafting and traditional end-to-side nerve coaptation. In group A, a peroneal nerve defect measuring 1 cm was created in the left hind limb, and a nerve graft 1 cm long was used to bridge the defect. In group B, only the distal stump of the peroneal nerve was coapted to the intact tibial nerve. In group C, both ends of the peroneal nerve defect were coapted to the intact tibial nerve in an end-to-side fashion 1.5 cm apart from each other, and in group D, the peroneal nerve defect was left unrepaired. Group E was consisted of nonoperated peroneal nerves that were used to obtain normative data. Although significantly higher myelinated axon densities were observed in groups B and C compared with group A and group E, total number of the myelinated axons was significantly higher only in group C. Peroneal functional index assessments demonstrated that nerve recovery in the peroneal nerve was similar in groups A and C, and both were better than those observed in groups B and D. Collectively, these results suggest that end-to-side coaptation of both ends of a severed nerve to an intact nerve, in case of a nerve defect in this length, may serve as an alternative for nerve grafting.     

A comparison of teledermatology using store-and-forward methodology alone, and in combination with Web camera videoconferencing

We compared the diagnostic accuracy of conventional asynchronous teledermatology ('store-and-forward' [SAF]) with a combined technique, in which SAF methodology was used first, followed by a videoconference using low-cost Web cameras. The study involved 228 patients with 242 lesions. For each case, two independent teledermatologists (A and B) evaluated digital images and clinical information by the conventional SAF method and gave a single diagnosis. Then, each communicated with the patient via Web cameras and gave a single diagnosis (combined method). Finally, teledermatologist A performed a face-to-face examination of each patient and established the gold standard diagnosis. With the conventional SAF method, the diagnostic accuracy of teledermatologist A was 81%, while that for teledermatologist B was 75%. With the combined method, the corresponding values were 90% and 82% (P<0.001 for both). There was no significant difference in the interobserver agreement between the two methods. Use of Web camera videoconferencing improved patient satisfaction with teledermatology. This method of teledermatology may be a useful alternative to the SAF method alone.