Spontaneous knot formation complication of double J: two case reports.

BACKGROUND: Use of ureteral stents has become an integral part of urological practice. However, it also brought with it many complications. Double J (DJ) stent knotting is a rare stent complication, and only a few cases have been reported in the literature. Although the exact cause is unknown and, in the literature, it is generally thought that knots occur due to traction. In this case report we present for the first time that spontaneous knots can occur due to ureteral peristalsis or ureteral anomalies. CASE PRESENTATION: Two patients (67 and 35 aged-Caucasian person) with ureteral stones who presented to the emergency department with colicky pain and had no previous history of urological surgery. We observed knot formation in the routine urinary system radiographs taken before stent removal in two patients whose ureters were observed to be narrow during endoscopic ureteral stone treatment. The stents were successfully removed using gentle traction under general anesthesia. CONCLUSIONS: We discussed the cause and solution of spontaneous knot formation. We emphasized the importance of the direct urinary system radiograph taken before DJ stent removal.

[Guillain-Barré syndrome caused by intravesical instillation of Bacillus Calmette-Guérin]. / Bacillus Calmette­Guérin intravesicalis instillációja által okozott Guillain­Barré-szindróma.

Introduction - Guillain-Barré syndrome (GBS) is an acute inflammatory demyelinating polyneuropathy. In the vast majority of patients, 1-4 weeks before the onset of GBS-related symptoms, an event such as upper respiratory tract or gastrointestinal tract infection, surgical intervention or vaccination is present. To the best of our knowledge, this is the first case of GBS that occurred after intravesical Bacillus Calmette-Guérin (BCG) therapy in the absence of tuberculosis or any other infection in the English literature.
Case report – A 65-year-old male patient, who had no systemic disorders except hypertension and coronary artery disease, underwent transurethral resection of a bladder tumour further to imaging studies investigating macroscopic haematuria. A pathologic examination revealed a non-muscle-invasive high-grade (pT1HG) transitional cell carcinoma. Immediately after the fourth cycle of intravesical BCG, which was administered 2 months after surgery, the patient experienced numbness and weakness in his lower and upper extremities, respectively. There were no signs or symptoms related to an acute cranial pathology or infectious disease. Nerve conduction studies, which were carried out on the 7th day after the onset of the neurologic symptoms, revealed a demyelinating sensorimotor polyneuropathy with mild secondary axonal damage in upper and lower limbs with a sural sparing pattern.
Conclusion - Without tuberculosis infection, GBS can occur secondary to increased immune response and antibodies triggered by intravesical BCG therapy. However, considering the worldwide use of BCG vaccination and thousands of intravesical BCG therapies, this is a very rare adverse effect. 

Prospective Investigation on the Paternity Intention and Affecting Factors in 84 Post-treatment Testicular Cancer Patients.

PURPOSE: to investigate the factors affecting post-treatment paternity intention in patients followed up after the diagnosis of testicular cancer and to make recommendations for the early postoperative period based on the identified factors. MATERIALS AND METHODS: This prospective descriptive study included total 185 patients who presented to our outpatient clinic between February 2000 and July 2020 who had radical orchiectomy due to suspected testicular cancer based on physical examination and other assessments. Contact information was found for 88 of 185 patients, and accordingly, the patients were reached by one-to-one phone calls. Upon literature review, a questionnaire consisting of 10 previously validated items was developed by the researchers. The patients were compared by separating them into two groups composed of patients with (Group 1) and without (Group 2) paternity intention. RESULTS: A total of 84 patients participated in the study, and the participation rate was 95.5%. It was found that 19 of 32 (38%) patients with paternity intention already had children. Only 21 (40%) of 52 patients without paternity intention were married. The mean age was 26.65 (18-39) years in Group 1, while it was 28.73 (19-45) years in Group 2. Tumor volume and serum tumor markers were higher in Group 2 than in Group 1. Parameters such as testicular side in which the tumor was located, smoking status, undescended testis history, and postsurgical chemotherapy history were not statistically significant difference between the two groups. CONCLUSION: The major findings included that the young aged, unmarried, and serious testicular cancer (Tumor volume and serum tumor markers were higher) can be affecting factors for testicular cancer patients' paternity intention. Early psychological counseling about paternity may be useful for testicular cancer patients.

Association between Serum Carcino-embryonic Antigen Levels and Micropapillary Bladder Cancer Metastasis in an Elderly Male.

We, herein, present a case of a micropapillary variant of bladder cancer metastasizing to lymph nodes in an 87-year male with elevated serum carcinoembryonic antigen (CEA) levels (2637.8 ng/mL). The patient was evaluated for dyspeptic symptoms and elevated CEA levels. Colonoscopy and upper gastrointestinal endoscopy were normal. Contrast-enhanced computed tomography revealed a bladder tumour. Transurethral resection of bladder tumour (TUR-BT) was performed, and histologically, the tumour was reported as urothelial carcinoma (UC), high grade, and pT1. Intravesical Bacillus Calmette-Guérin (BCG) was started three weeks after TUR-BT and continued for two years. F-18 FDG PET/CT scans were performed every six months during the follow-up due to persistently elevated CEA levels. During follow-up, there was no recurrence of UC in the bladder. Two years later, he was admitted again with lymph node swelling in the left inguinal area. A tru-cut biopsy was performed, which showed UC with a micropapillary component. Gemcitabine monotherapy was given, which resulted in partial response, and a significant decline in serum CEA levels (490.17 ng/mL). Key Words: Carcinoembryonic antigen, Urothelial carcinoma, Bladder cancer, Micropapillary variant, Gemcitabine monotherapy.

Urethral monopolar cauterization: alternative infravesical obstruction model in male rats.

OBJECTIVE: We aimed to determine which method gives the most consistent results between urethral monopolar cauterization and standard urethral partial ligation methods for the urethral obstruction model. METHODS: Thirty male rats were randomly divided into control, partial ligation, and monopolar cauterization groups. Six weeks after experimental procedures, the experimental groups were evaluated cystometrically, biochemically, and histologically. RESULTS: According to the cystometric results, bladder capacity, baseline bladder pressure, and compliance data of the monopolar cauterization group were higher than those of the partial ligation and monopolar cauterization groups (p<0.05 and p<0.01, respectively). As a biochemical evaluation, malondialdehyde levels in bladder tissues of group control were higher than partial ligation and monopolar cauterization groups (p<0.05 and p<0.01, respectively). The collagen type I level of the control group was higher than the partial ligation and monopolar cauterization groups (p<0.01 and p<0.05, respectively). Collagen type III levels of the monopolar cauterization group were higher than those of the control group (p<0.01), but the Collagen type I/Collagen type III and transforming growth factor-ß levels of the monopolar cauterization group were significantly lower than those of the control group (p<0.001). As a histological evaluation (hematoxylin and eosin), fibrosis in the lamina propria was more prominent in the monopolar cauterization group than in the control group (p<0.05). In addition, the muscular thickness was higher in the monopolar cauterization group compared with control and partial ligation groups (p<0.001 and p<0.01, respectively). CONCLUSION: The needle-tipped monopolar cauterization of the posterior urethra may be the method of choice for creating a chronic infravesical obstruction model of infravesical obstruction in male rats.

Urethral monopolar cauterization: alternative infravesical obstruction model in male rats

SUMMARY OBJECTIVE: We aimed to determine which method gives the most consistent results between urethral monopolar cauterization and standard urethral partial ligation methods for the urethral obstruction model. METHODS: Thirty male rats were randomly divided into control, partial ligation, and monopolar cauterization groups. Six weeks after experimental procedures, the experimental groups were evaluated cystometrically, biochemically, and histologically. RESULTS: According to the cystometric results, bladder capacity, baseline bladder pressure, and compliance data of the monopolar cauterization group were higher than those of the partial ligation and monopolar cauterization groups (p<0.05 and p<0.01, respectively). As a biochemical evaluation, malondialdehyde levels in bladder tissues of group control were higher than partial ligation and monopolar cauterization groups (p<0.05 and p<0.01, respectively). The collagen type I level of the control group was higher than the partial ligation and monopolar cauterization groups (p<0.01 and p<0.05, respectively). Collagen type III levels of the monopolar cauterization group were higher than those of the control group (p<0.01), but the Collagen type I/Collagen type III and transforming growth factor-β levels of the monopolar cauterization group were significantly lower than those of the control group (p<0.001). As a histological evaluation (hematoxylin and eosin), fibrosis in the lamina propria was more prominent in the monopolar cauterization group than in the control group (p<0.05). In addition, the muscular thickness was higher in the monopolar cauterization group compared with control and partial ligation groups (p<0.001 and p<0.01, respectively). CONCLUSION: The needle-tipped monopolar cauterization of the posterior urethra may be the method of choice for creating a chronic infravesical obstruction model of infravesical obstruction in male rats.

Is PSA Still the Best Predictor for Biochemical Recurrence after Radical Prostatectomy in High-Risk Prostate Cancer?

BACKGROUND: Patients with high-risk prostate cancer (PCa) experience heterogeneous oncological outcomes. In this study, we assessed the patients who underwent an RP procedure because of high-risk prostate cancer in subgroups formed according to D'Amico criteria and analyzed the effects of these criteria on biochemical recurrence (BCR) after RP. METHODS: We retrospectively identified high-risk non-metastatic PCa patients who underwent RP between 2006 and 2020 in our hospital. Groups were formed as follows: group 1 consisted of those with an ISUP grade 4 - 5 biopsy, group 2 consisted of those with a clinical stage T2c, group 3 consisted of those with a tPSA level ≥ 20 ng/ml, and group 4 consisted of those with locally advanced disease. Survival analyses were made by Kaplan-Meier test and Log Rank test. A P value <0.05 was accepted as statistically significant. RESULTS: Of all patients, 61.8% were cured by only RP and 38.2% had recurrences. Rates of BCR were significantly different among groups (P = 0.003). In group 1, group 2, group 3, and group 4, BCR rates were 30.8%, 13%, 40.8%, and 70.6%, respectively. Mean BCR-free survival was 82.47 ± 11.64 months. In group 2, BCR-free survival was higher than that in group 3 and group 4 (P1 = 0.020 and P2 = 0.001) and in group 1, BCR-free survival was higher than that in group 4 (P = 0.016). There was no significant difference between group 3 and 4 (P > 0.05). CONCLUSION: Despite the developments in the imaging technology, an elevated tPSA level remains to be an important predictor for BCR-free survival.

Effect of sexual arousal on semen parameters during abstinence.

Semen analysis and physical examination are performed while first evaluation for patients with male infertility. Alcohol, smoking and dietary habits can affect the semen parameters. This study aimed to evaluate whether semen parameters are changed with sexual arousal. After excluding, 100 patients with ages of 18-45 were included to the study. All semen analysis were performed with three days of sexual abstinence. An identified 20 min video link was determined to the patients and while the sexual abstinence were told to watch this video once a day; after 3 days abstinence semen analysis was examined again. In the detailed examination normal spermatozoa ratio (Tygerberg strict criteria), spermatozoa concentration, semen volume, total motility and progressive motility ratios were noted. When the two semen analysis from the same patient are compared, it was observed that all parameters did not change except semen volume and total motile sperm count (p < 0.001). In conclusion, to understand the effect of sexual arousal during the sexual abstinence, we need studies with high patient number and longer follow-up.

Synchronous Breast Cancer and Renal Leiomyoma.

We present a case of a 49-year Turkish woman who had synchronous renal leiomyoma and breast cancer. The patient was evaluated for a suspicious breast mass; and renal mass was detected incidentally by contrast-enhanced computed tomography (CT). Diagnostic tru-cut biopsy was performed for both masses. Breast mass biopsy was reported as invasive ductal carcinoma (IDC) while renal biopsy was described as benign mesenchymal tumour. According to the biopsy results, the renal mass was followed for six months. For breast cancer, segmental mastectomy and concomitant sentinel lymph node biopsy was performed. Histologically, the tumour was reported as IDC and low-grade cribriform ductal carcinoma in situ (less than 1%). Six months later, renal mass was excised by laparoscopic approach. Histopathological examination was consistent with renal leiomyoma. For both tumours, no recurrence within one year was found on follow-up. Key Words: Renal leiomyoma, Breast cancer, Laparoscopy.

A rare association in a patient with non-muscle invasive bladder cancer: ureteral fibroepithelial polyp and ipsilateral renal cell carcinoma: a case report.

BACKGROUND: Fibroepithelial polyps located in the ureter constitute 2-6% of all benign tumors in the urinary system. Distinguishing these lesions from transitional cell carcinoma is essential to avoid unnecessary nephroureterectomy. CASE PRESENTATION: A 59-year-old asymptomatic caucasian male patient was enrolled in follow-up for Ta low-grade transitional cell bladder cancer 4 years ago in our clinic. A suspicious, solid, contrast-enhancing mass 15 × 9 mm in diameter in the anteromedial mid-section of the left kidney, which was causing minimal washout and largely located in the parenchyma, was reported as renal cell carcinoma on computed tomography during routine controls. In the excretory phase, soft-tissue densities of approximately 30 mm in length, which were located in the distal part of the left ureter at a distance of 40 mm from the ureterovesical junction, extending towards the lumen suggested a urethral carcinoma. Urothelial lesion was reported as fibroepithelial polyp after histopathological examination. Partial nephrectomy for the mass, which was reported as renal cell carcinoma in the left kidney, was performed in the first postoperative month. Histopathological examination revealed Fuhrman grade 1 papillary type renal cell carcinoma. No recurrence was observed in the first year after treatment. CONCLUSIONS: Although our patient had a bladder transitional cell carcinoma and a suspicious renal cell carcinoma mass of 15 mm in the ipsilateral kidney, the patient was safeguarded from unnecessary nephroureterectomy early on by cross-sectional and endoscopic imaging of the ureter.

Prognosis of primary or metachronous prostate cancer in multiple primary genitourinary cancers; a single center experience with long-term results.

OBJECTIVE: This study aims to analyze the challenges, approaches and long-term results of primary or metachronous prostate cancer (PCa) in cases with multiple primary genitourinary cancers. METHODOLOGY: A total of 17 patients were included in the study. Patients with multiple primary genitourinary cancers were divided into two groups according to the diagnosis of primary or metachronous PCa as group 1 and group 2. RESULTS: The median age of patients was similar in both groups. The median smoking status (pack-years) was higher in group 2 than group 1. The median prostate-specific antigen (PSA) level was higher in group 1 than group 2. The median follow-up time from primary to the metachronous tumour was higher in group 1 than group 2. The rate of recurrence in PCa was higher in group 1 than group 2. No statistically significant difference was observed in terms of patients' age, smoking status, PSA levels at diagnosis of PCa and biochemical recurrence or metastasis between the two groups (p > 0.05). CONCLUSION: Primary PCa cases may progress more aggressively than metachronous PCa cases. Biochemical recurrence and metastasis may be less threatening in metachronous PCa cases than primary cases. Therefore, aggressive treatment can be avoided for metachronous PCa cases.

Contribution of pre-varicocelectomy color Doppler ultrasonography finding to surgery and its correlation with semen parameters.

BACKGROUND: This study aimed to determine the contribution of color Doppler ultrasonography (CDUS) performed before varicocelectomy to the success of surgical treatment and to evaluate the correlation between CDUS findings and semen parameters. METHODS: A total of 84 patients diagnosed with grade 3 left varicocele in our clinic between 2016 and 2018 were evaluated. The patients in whom the decision for varicocelectomy was based on only physical examination (PE) findings and abnormal semen analysis (SA) were defined as Group 1, while the patients undergoing varicocelectomy based on PE, CDUS and SA findings were defined as Group 2. The patients diagnosed with varicocele based on PE and CDUS findings who were included in a followup protocol due to normal semen parameters were defined as Group 3. RESULTS: In Group 1, there was a total of 28 patients and the mean number of ligated internal spermatic veins was 4.53 (range, 2-10). In Group 2, there was a total of 30 patients and the number of ligated internal spermatic veins was 3.76 (range, 1-8). No statistically significant difference was found between Group 1 and 2 in terms of the number of internal spermatic veins ligated during varicocelectomy. No statistically significant correlation was found between semen parameters and the number of veins ligated during varicocelectomy in Group 1 and 2 and between semen parameters and CDUS findings group 2 and 3. CONCLUSIONS: In patients with primary grade 3 varicocele, diagnosed by physical examination there is no need for additional imaging in primary cases.

The Lifelong Mysterious Relapsing "Kidney" Disease of the Founder of Turkey; Atatürk (1881-1938) in Connection with European Medical and Political History.

INTRODUCTION: Although Mustafa Kemal Atatürk (1881-1938) was a national hero with his intrepid and enlightened attempts to establish modern Turkey from the remnants of Ottoman heritage, he had been suffering from lifelong "kidney disease" that appeared with intermittent flank pain and fever without an identified source. However, we think that this physical pain that he endured only increased his motivation to focus on his military and political aims. Methods & Results: In this historical review article, we have focused on his personal medical life and specifically his "kidneys" from the beginning of the complaint till his death through European medical and political history with geographic locations and speculated upon it via past, near past, and recent medical literature. CONCLUSION: Mustafa Kemal Atatürk, the great military and political leader for his country, had always suffered from uro/nephrological problems throughout his life. We think that this was one of the reasons that urology has been privileged and thus to be the oldest separated medical surgical branch in Turkey and to some significant extent with European urological history.

Correlation of the Grade Group of Prostate Cancer according to the International Society of Urological Pathology (Isup) 2014 Classification between Prostate Biopsy and Radical Prostatectomy Specimens.

ABTRACTWe aimed to assess the correlation between ISUP 2014 grades of needle biopsy (NB) and radical prostatectomy (RP) specimens and the parameters effecting this correlation. A total of 353 patients, who underwent a radical prostatectomy with diagnose of prostate cancer, were included in the study. Especially, the maximum percentage of core involved by cancer (MPCI) of upgraded group was significantly higher than those of correlated group and downgraded group. MPCI might be used as a preoperative value to determine risk classification and to help counsel patients with regard to treatment decision and prognosis of disease.

Can the systemic immune inflammation index be a predictor of BCG response in patients with high-risk non-muscle invasive bladder cancer?

AIM: We aimed to investigate the predictor role of the systemic immune-inflammation index (SII) on Bacille Calmette-Guerin (BCG) response in patients with high-risk non-muscle invasive bladder cancer (NMIBC). METHODS: A total of 96 patients with high-risk NMIBC, who received intravesical BCG, were enrolled in the study. BCG responsive group (group 1) and BCG failure group (group 2) were compared in terms of demographic and pathological data, peripheral lymphocyte, neutrophil and platelet counts, neutrophil lymphocyte ratio (NLR), platelet lymphocyte ratio (PLR), SII, recurrence-free survival (RFS) and progression-free survival (PFS). The SII was calculated as in the formula: SII = neutrophil × platelet/lymphocyte. The prognostic ability of the SII for progression was analysed with multivariate backward stepwise regression models. RESULTS: The mean follow-up time 34.635 ± 14.7 months. Group 2 had significantly higher SII, peripheral lymphocyte, neutrophil and platelet counts than group 1. An ROC curve was plotted for the SII to predict the BCG failure and the cut-off point was calculated as 672.75. Effect of the SII to the model was statistically significant (P = .003) and a higher SII increased the progression onefold. A tumour greater than 30 mm in size and a high SII together increased the progression 3.6 folds. CONCLUSIONS: The SII might be a successful, non-invasive and low-cost parameter for prediction of BCG failure in patients with high-risk NMIBC. The cut-off value for SII is 672.75 and above this level BCG failure and progression to MIBC might be anticipated. However, these results should be validated in prospective randomised controlled studies with large patient groups.

Is there any association of COVID-19 with testicular pain and epididymo-orchitis?

AIMS: This study aims to analyse the novel Coronavirus disease- (COVID-19) related testicular pain in hospitalised patients because of COVID-19 and to review as an aetiological factor for epididymitis, orchitis or both. METHODS: A total of 91 patients were included in the study. A questionnaire was formed for the questioning of testicular pain or epididymo-orchitis in patients with COVID-19. Demographics and past medical history was also recorded. Patients' neutrophil and lymphocyte counts, neutrophil-lymphocyte ratios (NLR), C-reactive protein (CRP) levels and D-dimer values were recorded. Patients with COVID-19 were divided into two groups according to absence or presence of testicular pain or epididymo-orchitis as group 1 and group 2. All results were compared for both groups. RESULTS: The median age of patients was similar in both groups. Testicular pain was occurred in 10.98% of the patients. Clinical presentation of epididymo-orchitis was diagnosed in only one patient. No statistically significant difference was reported in terms of patients' age, levels of CRP and D-Dimer or NLR and results of questionnaire form queries between the two groups (P > .05). CONCLUSION: Testicular pain was observed more frequently in hospitalised COVID-19 cases. While no inflammation marker which is related to predict of testicular pain or epididymo-orchitis was found in patients with COVID-19.

COVID-19 infection threat in patients with high-risk non-muscle invasive bladder cancer receiving intravesical BCG therapy.

AIM: We evaluated the COVID-19 infection threat in patients receiving intravesical BCG therapy which has immunotherapeutic effects and is of vital importance in most of the individuals with high-risk non-muscle-invasive bladder cancer (NMIBC) and investigated the need for postponement of this therapy. METHODS: A total of 71 patients, who were diagnosed with high-risk NMIBC and on intravesical BCG treatment regularly (induction or maintenance), were enrolled in the study. The patients were classified into two groups depending on whether they were diagnosed with COVID-19 during the pandemic period or not. RESULTS: Of 71 patients, 26 underwent a COVID-19 polymerase chain reaction test with clinical suspicion during the pandemic period. Of these 26 patients, 4 were diagnosed with COVID-19. Age of the patients, working status (working/retired), compliance with containment measures against the pandemic, number of BCG courses, adverse effects after BCG therapy and systemic immune-inflammation index, which is an inflammation-related parameter, were not different between groups (P > .05). Neutrophil/lymphocyte ratio was significantly higher in the COVID-19 positive group (P < .05). COVID-19 positivity was higher in age groups 50-64 (6.6%) and 65-80 (5.8%) years than that in similar age groups of the normal population. CONCLUSION: Every effort should be made to administer intravesical BCG treatment in high-risk NMIBC patients even during the pandemic period. However, increased risk of COVID-19 transmission should be kept in mind and protective measures against COVID-19 for healthcare providers and patients before the procedure should be taken optimally. The procedure should be postponed in patients with lymphopenia in recent complete blood count.

Is primary adult hypospadiatic prepuce different from healthy prepuce in terms of microvascular density and androgen-estrogen-progesterone receptors?

This study aims to determine the histological data such as microvessel density, nerve density, and the androgen, oestrogen and progesterone receptor density in the prepuce of primary distal hypospadias cases in adulthood, compared to that of healthy individuals in the same age group. Between 2014 and 2019, we prospectively evaluated adult hypospadias and adult circumcision patients. A total of 28 patients were included: Group 1 (18 patients) primary distal hypospadias and Group 2 (10 patients-control group) healthy individuals who had a previous circumcision request for social/religious reasons. The prepuce of healthy individuals that were excised after the circumcision and the excised parts excluded from the prepuce that was used in reconstruction during the repair of hypospadias, were shaped and stored to be able to perform a study by the pathology clinic. Histopathological findings on adult distal hypospadias cases showed that the microvascular density and inflammation in the prepuce with hypospadias were found to be increased compared to the healthy prepuce and the density of androgen and oestrogen receptors was similar in both groups. Unlike childhood studies, in this study with adults, the progesterone receptor was detected in both groups and found to be significantly lower in the hypospadias group.

Association between atherogenic dyslipidemia and fournier's gangrene.

OBJECTIVE: We aimed to determine whether atherogenic dyslipidemia is associated with the disease and morbidity in our patients treated for Fournier's gangrene (FG). METHODS: Sixty-two patients who were treated with the diagnosis of FG at our center between 2012 and 2017 were retrospectively screened. RESULTS: The triglyceride values of the patients who required reconstructive surgery were statistically significantly higher than those of the patients for whom wound debridement and primary suturing was sufficient (p:0.001). A total of 65.7% of the patients had normal triglyceride values in the group in which wound debridement and primary suturing was sufficient, while this rate was 22.2% in the group of patients who needed reconstructive surgery; the difference was statistically significant (p: 0.002). The UFGSI score of those with triglyceride values higher than the normal range was statistically significantly higher (p:0.006). The cut-off point for the triglyceride value for which Fournier's gangrene was more morbid and the probability of reconstructive surgery need was significantly higher, i.e., >233mg. CONCLUSION: Our study has demonstrated that atherogenic dyslipidemia, especially hypertriglyceridemia, is an important factor affecting morbidity and associated with high patient care costs after hospitalization and discharge in FG.

The importance of PSA-Density in active surveillance for prostate cancer.

OBJECTIVE: In this study, we aimed to determine the predictive factor for additional treatment requirement in active surveillance (AS) for patients with low or very low-risk prostate cancer (PCa) and we investigated the effect of tumor burden by total core involvement rate in biopsy to predict of need for additional treatment. MATERIAL AND METHODS: 107 patients with PCa in AS between 2005 and 2018 have been evaluated retrospectively. Groups were divided into two groups according to the need for additional treatment. Group 1 received additional treatment, group 2 did not receive additional treatments and active surveillance was continued. Patient's total prostate-specific antigen (tPSA), prostate-specific antigen density (PSA-D), total core involvement count, quantity and rate at biopsy pathology results and follow-up period were recorded and compared in the two groups. RESULTS: The current cohort includes 107 patients. Mean age at diagnosis was 63.01years. Mean tPSA values at diagnosis were 6.09 ng/mL and 5.2 ng/mL in the group 1 and group 2, respectively. Mean follow-up period was 38.1 months (range, 12 to 134 months). Only PSA-D measurement significantly predicted need for additional treatment (p = 0.017). ROC analysis showed that the optimal threshold was 0.13 ng/mL/cc (sensitivity: 70.8%; specificity: 57.1%). Additional treatment requirement was not detected in patients with PSA-D cut-off level less than 0.07 ng/mL/cc. CONCLUSIONS: Total tumor burden of less than 5% is safe for patients with low or very low-risk PCa in AS. A 0.13 ng/mL/cc cut-off level of PSA-D can predict to need for additional treatment in patients managed by AS.