[A Case of Massive Prostate Abscess Treated by Transperineal Drainage].

The patient was an 81-year-old man who visited a clinic for fever and lower abdominal pain. He was subsequently diagnosed with prostatitis based on computed tomography (CT) findings that showed swelling of the prostate. Despite treatment with antibacterial therapy, his symptoms did not improve significantly. Since the patient also had myelodysplastic syndrome, he was transferred to our hospital and subsequently diagnosed with prostate abscess based on findings on magnetic resonance imaging (MRI). The abscess had spread widely from the dorsal side of the trigone of the bladder to anterior wall of the rectum. Transperineal drainage was performed to preserve the urethral mucosa of the prostatic urethra. Considering the shape of the abscess cavity, one pigtail catheter was placed in the prostate and another was placed transperineally on the dorsal side of the trigone of the bladder. Cystostomy was performed at the same time. Culture of the abscess revealed the presence of Staphylococcus aureus. As there was little exudate from the abscess 9 days after drainage, the pigtail catheter on the dorsal side of the trigone of the bladder was removed following an injection of minocycline into the abscess. CT showed shrinkage of the abscess 4 days later, and the remaining intraprostatic pigtail catheter was removed after an injection of minocycline. The cystostomy pigtail catheter was subsequently removed since the patient was able to urinate smoothly after clamping. MRI confirmed the disappearance of the abscess cavity 2 months later.

Metabolic changes with degarelix vs leuprolide plus bicalutamide in patients with prostate cancer: a randomized clinical study.

PURPOSE: In a mouse model, degarelix generated the least metabolic consequences via low follicle-stimulating hormone (FSH) levels compared with orchiectomy and leuprolide after 4 months of androgen deprivation therapy (ADT). Here, we comparatively investigated the influence of ADT with degarelix or leuprolide on the development of metabolic syndrome in patients with prostate cancer (PCa). METHODS: Patients with hormone-naive PCa were recruited. Eligible patients were randomized (1:1) to monthly degarelix or monthly leuprolide for 6 months. Key trial variables were monitored monthly. The primary endpoint was changes in fasting blood sugar (FBS). Secondary endpoints were changes in body weight, abdominal circumference, lipid profiles, and hemoglobin A1c (HbA1c) and FSH levels. Computed tomography was performed to measure subcutaneous and visceral fat areas before and after 6 months of ADT. Data were analyzed using the χ2 test, Student's t test, and analysis of variance. RESULTS: From the 100 patients registered, 85 completed the trial (degarelix: 40 patients; leuprolide: 45 patients). Mean increases in FBS did not differ between the two arms. Similarly, there were no differences between the arms in mean increases in body weight, abdominal circumference, lipid profiles, HbA1c, or subcutaneous and visceral fat areas. Follicle-stimulating hormone levels were significantly lower in the degarelix arm than in the leuprolide arm (p < 0.05). CONCLUSIONS: Lipid and glucose metabolism did not differ significantly between the arms, while FSH levels were significantly lower in the degarelix arm.

Impact of Androgen Deprivation Therapy on Non-Alcoholic Fatty Liver Disease in Patients with Prostate Cancer: A CT Evaluation.

PURPOSE: The aim of this study was to investigate the influence of androgen deprivation therapy (ADT) on the progression of non-alcoholic fatty liver disease (NAFLD) in patients with prostate cancer (PCa) by evaluation of hepatic steatosis on computed tomography (CT). METHODS: The study included 77 PCa patients who underwent abdominal CT at baseline and after 6 months of ADT. The degree of hepatic steatosis was evaluated according to the attenuation value for liver parenchyma (CTLP), the attenuation ratio for liver and spleen (LSratio), and the difference in attenuation between LS (LSdif). The associations between these 3 indices and various metabolic syndrome-related factors were analyzed. RESULTS: The number of NAFLD patients increased from 9 (11.6%) at baseline to 16 (20.7%) after ADT. The CTLP, LSratio, and LSdif values were significantly lower after ADT than before (p < 0.05). There were significant correlations between the percent change in CTLP and the percent change in HbA1c, between the percent change in LSratio and the percent change in abdominal circumference, and between the percent change in LSdif and the percent change in BMI. CONCLUSIONS: Six months of ADT was associated with significant progression of NAFLD in PCa patients. This progression was strongly correlated with changes in HbA1c, abdominal circumference, and BMI.

Efficacy of Enzalutamide Rechallenge for Metastatic Castration-Resistant Prostate Cancer.

OBJECTIVE: There have been several reports on rechallenge with docetaxel, cabazitaxel, abiraterone acetate, or ethinylestradiol for metastatic castration-resistant prostate cancer (mCRPC). However, the efficacy of enzalutamide rechallenge for mCRPC has not been evaluated. METHODS: We retrospectively reviewed 63 consecutive patients who received enzalutamide for mCRPC at our institution between 2014 and 2022. Eight of these patients underwent rechallenge with enzalutamide after disease progression on prior enzalutamide and other therapy and were the focus of this study. The prostate-specific antigen (PSA) response (PSA decrease >50%), PSA progression-free survival, treatment duration, overall survival (OS) after CRPC, and treatment-related adverse events were evaluated. RESULTS: PSA decline to enzalutamide rechallenge was observed in 6 patients (75%), of which 2 patients had a PSA response. The median treatment duration was 4 months (range 1-12) and median PSA progression-free survival was 3 months (range 1-7). Median OS after CRPC was 41 months. OS after CRPC was not increased in patients with a PSA response. No toxicities were worse than grade ≥3. CONCLUSION: Enzalutamide rechallenge achieved a PSA response in a quarter of our patients with mCRPC after disease progression on prior enzalutamide. However, no improvement of OS was identified in these patients.

A case of squamous cell carcinoma arising from a suprapubic cystostomy tract in a patient with spinal bifida: Immunohistochemical analysis and literature review.

Introduction: Squamous cell carcinoma arising from a suprapubic cystostomy tract is a rare complication of an indwelling catheter and is caused by long-term inflammation and mechanical irritation. Prognosis is relatively poor. Biomarkers in the cancer pathway have not been investigated. Case presentation: A 61-year-old woman with a 34-year history of suprapubic catheter placement presented with a rapidly growing elevated lesion around the cystostomy site. Tumor biopsy confirmed squamous cell carcinoma. Local excision with partial cystectomy was performed. Multiple metastases were identified 5 months later. The patient died 14 months after the initial treatment. Immunohistochemical analysis of the resected specimen revealed alterations in vascular endothelial growth factor, epidermal growth factor receptor, cyclooxygenase-2, and Ki-67. Conclusion: We encountered a case of squamous cell carcinoma arising from a suprapubic cystostomy tract. Immunohistochemical analysis revealed activation of multiple carcinogenic pathways in cancer cells, including those for angiogenesis, signal transduction by epidermal growth factor receptor, inflammation, and cell proliferation.

[Recurrent advanced gastric cancer diagnosed 20 years after partial gastrectomy].

A 67-year-old woman underwent partial gastrectomy (por2+sig, stage IIIA) for gastric cancer. She was admitted to our hospital because of swelling of her left neck lymph nodes 20 years after surgery. A biopsy specimen revealed poorly differentiated adenocarcinoma with signet-ring cell carcinoma. We diagnosed recurrence of gastric cancer and gave chemotherapy, but she died of myelosuppression and disseminated intravascular coagulation 2 years later. On autopsy, we examined all organs except the brain, but the primary lesion was not recognized. We concluded that this case was late recurrence after partial gastrectomy for advanced gastric cancer.

Androgen receptor-neuroendocrine double-negative tumor with squamous differentiation arising from treatment-refractory metastatic castration-resistant prostate cancer.

INTRODUCTION: Treatment-refractory metastatic castration-resistant prostate cancer is a heterogeneous disease classified into androgen receptor-high prostate cancer, androgen receptor-low prostate cancer, amphicrine prostate cancer co-expressing androgen receptor and neuroendocrine genes, double-negative prostate cancer lacking androgen receptor and neuroendocrine gene expression, and small cell or neuroendocrine prostate cancer without androgen receptor activity. Double-negative tumors can convert to the squamous phenotype. CASE PRESENTATION: A 62-year-old man was newly diagnosed with prostate cancer (serum prostate-specific antigen 2613 ng/mL, Gleason score 4 + 5 = 9, cT3aN1M1b) that progressed to castration resistance 4 months after starting abiraterone with androgen deprivation therapy. After enzalutamide and docetaxel failed, a right ilium metastasis newly emerged. Needle biopsy confirmed a metastatic tumor with squamous differentiation that was CK5/6-positive and chromogranin A-, synaptophysin-, and androgen receptor-negative. CONCLUSION: We encountered a case of double-negative prostate cancer with squamous differentiation identified by needle biopsy of a right ilium metastasis after abiraterone, enzalutamide, and docetaxel failure.

Long-term disease control of metastatic type 2 papillary renal cell carcinoma using local treatment and molecular targeted therapy: A case report.

A 46-year-old man underwent right partial nephrectomy for type 2 papillary renal cell carcinoma (PRCC) in 2011. Lung metastasis and lymph node (LN) metastases around the inferior vena cave appeared in 2012. A right radical nephrectomy and extensive LN dissection was performed and the resection of lung metastasis was performed one month after the nephrectomy. Mediastinal LN metastases occurred in 2013, and resection of the affected LNs was performed. Sunitinib and zoledronic acid was started in 2014 because mediastinal LN swelling and multiple bone metastases appeared. Sunitinib treatment was stopped soon after due to adverse events and axitinib treatment was started. Axitinib was effective and the patient had stable disease for 30 months. Adverse events were successfully controlled by dose reduction and periodic drug withdrawal schedules (for example, 5 days on, 2 days off). Axitinib was further continued for 19 months as the metastatic lesions had progressed slowly. Temsirolimus treatment was started in 2019, but it was stopped after three cycles due to interstitial pneumonia. The patient died 80 months after the initial recurrence. Using multidisciplinary treatment, durable disease control was achieved in a patient with metastatic type 2 PRCC.

[CLINICAL ANALYSIS OF 95 CASES OF PERCUTANEOUS CYSTOSTOMY].

(Introduction) Percutaneous cystostomy is a standard urological procedure; however, very few reports have focused on the many cases of this procedure performed in Japan. We analyzed the background of the procedure and its approach as well as the incidence of its complications at our institution. (Material and methods) We examined 95 patients who underwent percutaneous cystostomy between April 2010 and March 2019. A comparative analysis was conducted for each type of procedure performed. Furthermore, cases that experienced accidental catheter extraction before the first catheter replacement were analyzed, and the three patient groups were compared based on the type of procedure performed and cases that needed another operation. (Result) The indications for cystostomy were urethral stricture (56.3%), neuropathic bladder (13.5%), and prostatic hyperplasia (11.5%). The complications included hemorrhage, peritoneal injury, urinary tract infection, and catheter damage caused by a puncture needle. The overall complication rate was 10.5%. Based on type of the procedure performed, the incidence of hemorrhage was found to be as high as 25% in patients who underwent the procedure using a cannula puncture needle. Accidental catheter extraction before the first catheter replacement occurred most frequently in patients treated with Seldinger technique (17.0%). The rate of complications including accidental catheter extraction ranged from 25.0% to 25.4% among the three groups. (Conclusion) We prefer the Seldinger technique for the first placement of the cystostomy catheter because of its low rate of hemorrhage, but a cannula puncture needle may also be used by using exploratory puncture if vascular damage and accidental catheter extraction are avoided.

The simultaneous expression of peroxisome proliferator-activated receptor delta and cyclooxygenase-2 may enhance angiogenesis and tumor venous invasion in tissues of colorectal cancers.

We conducted this study to evaluate the impact of the expression of peroxisome proliferator-activated receptor delta on angiogenesis in tissue samples of colorectal cancer. We examined 52 samples of primary human colorectal carcinomas and matched normal adjacent tissues to evaluate the expression of peroxisome proliferator-activated receptor delta, cyclooxygenase-2, vascular endothelial growth factor-A, and CD34 through immunohistochemical analysis. Peroxisome proliferator-activated receptor delta was expressed in 25 (48.1%), and cyclooxygenase-2 was expressed in 26 (50.0%) of total colorectal cancer tissues. Tissue samples were divided into four groups, according to the expression of peroxisome proliferator-activated receptor delta and cyclooxygenase-2. The positive rate of vascular endothelial growth factor-A, the levels of microvascular density, and the incidence of venous vessel invasion in peroxisome proliferator-activated receptor delta (+)/cyclooxygenase-2 (+) samples exceeded significantly those in the other three groups of tissue samples (P<0.05). The results suggest that the axis of the cyclooxygenase-2/peroxisome proliferator-activated receptor delta signal pathway might play a crucial role in the development of colorectal cancers by enhancing angiogenesis.

Penile-preserving surgery for male distal urethral carcinoma followed by buccal mucosa urethroplasty.

INTRODUCTION: We report a case of distal urethral carcinoma treated with segmental urethral excision and reconstruction by staged buccal mucosa urethroplasty. CASE PRESENTATION: A 60-year-old man presented with difficulty urinating and a palpable mass on the ventral side of his penis. He was diagnosed as having localized distal urethral carcinoma (cT2N0M0) and underwent penile-preserving surgery with staged urethroplasty using buccal mucosa as substitute tissue. The pathological diagnosis was squamous cell carcinoma of the urethra (T2) with negative surgical margin. At 2 years of follow-up, there was no recurrence or metastasis, he could void in a standing position with an acceptable urinary stream, and he found the appearance of his external genitalia acceptable. CONCLUSION: In cases of distal primary urethral carcinoma, urethroplasty using buccal mucosa graft could be alternative treatment option providing a better postoperative quality of life.

[A CASE OF EMPHYSEMATOUS PYELONEPHRITIS WHO PRESENTED THE PRESERVATION OF THE IPSILATERAL KIDNEY FOLLOWING OPEN DRAINAGE].

We report a case of a 53-year-old woman with emphysematous pyelonephritis who presented the preservation of the ipsilateral kidney following open drainage. She was transferred to our hospital with chief complaints of right back pain and high fever. On diagnosis, diabetes mellitus and a stone in the right ureter were confirmed, and she was followed up at a local clinic. Computed tomography revealed the presence of gas in the right renal pelvis, and the stone led to right hydronephrosis. Additionally, her hemoglobin A1c level was 11.3%. Hence, we diagnosed the patient with emphysematous pyelonephritis. Although right percutaneous nephrostomy was performed immediately after her admission, the gas in the right renal pelvis extended to the renal parenchyma one day later. Therefore, we performed open drainage of the right kidney to control severe inflammation. The gas disappeared after the procedure, and her systemic status gradually improved. We hypothesize that emphysematous pyelonephritis is treated with open drainage instead of nephrectomy while preserving the ipsilateral kidney.

[Intestinal tuberculosis of the terminal ileum causing obstructive ileus and tuberculous peritonitis and presenting numerous peritoneal small red nodules: a case report].

A 38-year-old woman suffering from lower abdominal pain was referred to our hospital. Abdominal computed tomography showed marked thickening of the terminal ileum to the cecum, localized collection of ascites, and multiple mesenteric lymphadenopathy. A barium contrast small bowel series showed solitary severe stenosis of the terminal ileum with marked swelling of the ileocecal valve, where colonoscopy could not pass through, suggesting that ileal stenosis was caused by intestinal tuberculosis. She also showed strongly positive tuberculin skin test. Laparoscopy-assisted ileocecal resection was performed for confirmation of diagnosis and removal of the stenotic intestinal lesion. Laparoscopically, numerous small red nodules scattered on the stenotic ileal serosa, peritoneum, and mesenterium. Histopathological examination revealed ileal tuberculosis causing ulcerative stricture, and mesenteric tuberculous lymphadenitis. The small red nodules were formed of hemorrhagic tuberculous nodules.

A Case of Pancreatic Side Effects Resulting from Sorafenib and Axitinib Treatment of Stage IV Renal Cell Carcinoma.

Tyrosine kinase inhibitors such as sorafenib and axitinib were developed to treat malignancies, including stage IV renal cell carcinoma. Recently, we experienced a patient with pancreatic side effects from both sorafenib and axitinib. We report this case and include a discussion of the literature.

Large nuclear overhauser fields detected in vertically coupled double quantum dots.

We report the electrical induction and detection of dynamic nuclear polarization in the spin-blockade regime of double GaAs vertical quantum dots. The nuclear Overhauser field measurement relies on bias voltage control of the interdot spin exchange coupling and measurement of dc current at variable external magnetic fields. The largest Overhauser field observed was about 4 T, corresponding to a nuclear polarization approximately 40% for the electronic g factor typical of these devices, |g*| approximately 0.25. A phenomenological model is proposed to explain these observations.

The 15-lipoxygenase-1 expression may enhance the sensitivity to non-steroidal anti-inflammatory drug-induced apoptosis in colorectal cancers from patients who are treated with the compounds.

BACKGROUND AND AIM: Non-steroidal anti-inflammatory drugs (NSAIDs) can prevent colorectal cancer (CRC), but their effect is limited. Recent studies have shown the involvement of 15-lipoxygenase-1 (15-LOX-1) in NSAID-induced apoptosis in colorectal carcinoma cells. We evaluate whether 15-LOX-1 expression influences the sensitivity of NSAID-induced apoptosis in CRCs. METHODS: In 22 CRC surgical samples from NSAID users who had been constant for more than 5 years and 28 CRC surgical samples from NSAID non-users, the expressions of 15-LOX-1, cyclooxygenase-2 (COX-2), beta-catenin, and p53 were analyzed using immunohistochemistry. TUNEL assay was also performed for samples. The effects of the transient transfection of 15-LOX-1 cDNA on indomethacin-induced apoptosis were certified in HCT-116 cells. The effects of adding 13-S-hydroxyoctadecadinoic acid (13-S-HODE) on indomethacin-induced apoptosis were also examined in HCT-116 cells. The levels of apoptosis were determined by the analysis of the floating-cells ratio and DNA gel electrophoresis. RESULTS: The expression of 15-LOX-1 on CRCs from NSAID users was significantly decreased compared with those from NSAID non-users; however, the expressions of other molecules were not significantly different between two groups. The levels of TUNEL scoring in samples from NSAID users were similar to those from NSAID non-users. Indomethacin (100 microM) induced less apoptosis in mocked cells, whereas the same concentrations of indomethacin enhanced the level of apoptosis in 15-LOX-1-transfected cells. 13-S-HODE also increased the level of indomethacin-induced apoptosis in cells. CONCLUSION: Results suggest that 15-LOX-1 expression may be one of the mechanisms which enhance the sensitivity to NSAID-induced apoptosis in CRCs from patients who are treated with the compounds.

Successful treatment of pure red cell aplasia and autoimmune cytopenia with cyclosporine and prednisolone in a patient with Sjögren's syndrome.

Abstract A 68-year-old woman was admitted to our hospital with xerophthalmia, xerostomia, leukopenia, and thrombocytopenia. She was diagnosed to have Sjögren's syndrome and autoimmune cytopenia. After 11 months, she was readmitted with severe anemia and reticulocytopenia. Mild hemolysis was seen, and bone marrow aspirate showed markedly decreased erythropoiesis. An association of pure red cell aplasia (PRCA) and autoimmune hemolytic anemia was diagnosed. After treatment with cyclosporine and prednisolone, her anemia dramatically improved. We discuss the mechanism of PRCA associated with Sjögren's syndrome.