BHD-associated kidney cancer exhibits unique molecular characteristics and a wide variety of variants in chromatin remodeling genes.

Birt-Hogg-Dubé (BHD) syndrome is a hereditary kidney cancer syndrome, which predisposes patients to develop kidney cancer, cutaneous fibrofolliculomas and pulmonary cysts. The responsible gene FLCN is a tumor suppressor for kidney cancer, which plays an important role in energy homeostasis through the regulation of mitochondrial oxidative metabolism. However, the process by which FLCN-deficiency leads to renal tumorigenesis is unclear. In order to clarify molecular pathogenesis of BHD-associated kidney cancer, we conducted whole-exome sequencing analysis using next-generation sequencing technology as well as metabolite analysis using liquid chromatography-mass spectrometry and gas chromatography-mass spectrometry. Whole-exome sequencing analysis of BHD-associated kidney cancer revealed that copy number variations of BHD-associated kidney cancer are considerably different from those already reported in sporadic cases. In somatic variant analysis, very few variants were commonly observed in BHD-associated kidney cancer; however, variants in chromatin remodeling genes were frequently observed in BHD-associated kidney cancer (17/29 tumors, 59%). Metabolite analysis of BHD-associated kidney cancer revealed metabolic reprogramming toward upregulated redox regulation which may neutralize reactive oxygen species potentially produced from mitochondria with increased respiratory capacity under FLCN-deficiency. BHD-associated kidney cancer displays unique molecular characteristics that are completely different from sporadic kidney cancer, providing mechanistic insight into tumorigenesis under FLCN-deficiency as well as a foundation for development of novel therapeutics for kidney cancer.

Early assessment with 18F-2-fluoro-2-deoxyglucose positron emission tomography/computed tomography to predict short-term outcome in clear cell renal carcinoma treated with nivolumab.

BACKGROUND: We reported previously the usefulness of 18F-2-fluoro-2-deoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) to predict prognosis of renal cell carcinoma (RCC) treated with molecular targeted agents. Herein we describe a preliminary research of nine patients who underwent FDG-PET/CT before and after initiation of nivolumab. METHODS: Patients with metastatic RCC who were treated by nivolumab from October 2016 to March 2017 were enrolled in this study. All patients underwent FDG-PET/CT at baseline and 1 month as a first response assessment, and contrast-enhanced or non-contrast-enhanced CT scan at 4 month as a second response assessment. Logistic regression analysis was performed to assess the association of potential predictors, including age, gender, baseline diameter, baseline maximum standardized uptake value (SUVmax), lung or not lung metastasis, elevation of SUVmax at 1st assessment, and decrease in diameter at 1st assessment with the response at 2nd assessment (decrease in the diameter ≥ 30% or not). RESULTS: There were 9 patients and 30 lesions. Mean days of first assessment with FDG-PET/CT and second assessment by CT scan from initiation of treatment were 32.3 ± 6.4, 115.5 ± 14.9, respectively. Lesions whose diameter decreased ≥30% at second assessment were defined as responding, and lesions whose diameter did not decrease ≥30% were defined as non-responding. There were 18 responding lesions, and 12 non-responding lesions. We compared change in diameter and SUVmax at first assessment with FDG-PET/CT, respectively. All lesions with decreased diameter and elevated SUVmax at first assessment with FDG-PET/CT showed responding at second assessment by CT scan, while most lesions with increased diameter and declined SUVmax at first assessment showed non-responding at second assessment. The multivariate logistic regression analyses revealed that only the elevation of SUVmax at 1 month was an independent predictor (P = 0.025, OR: 13.087, 95%CI: 1.373-124.716). CONCLUSION: Our findings suggest that the early assessment using FDG-PET/CT can be effective to predict the response of RCC to nivolumab. However, larger prospective studies are needed to confirm these preliminary results. TRIAL REGISTRATION: Registered in University Hospital Medical Information Network in JAPAN [ UMIN0000008141 ], registration date: 11 Jun 2012.

Gastrointestinal cancer and bilateral hydronephrosis resulted in a high risk of ureteral stent failure.

BACKGROUND: Urologists frequently encounter malignant ureteral obstruction (MUO) caused by advanced urological or non-urological malignant disease, but the treatment policy is unclear. The present study examined the risk factors for predicting ureteral stent failure in patients with MUO after ureteral stent insertion and the change in the renal function after retrograde ureteral stent insertion in cases of bilateral hydronephrosis. METHODS: A total of 39 patients who required ureteral stent placement for MUO at Yokohama City University Medical Center (Yokohama, Japan) between February 2007 and May 2016 were included in this study. The age, gender, type of cancer, hydronephrosis side, pre-stenting estimated glomerular filtration rate (eGFR), and eGFR increase were assessed as predictive factors for stent failure. Among these 39 patients, 25 showed bilateral hydronephrosis. Thirteen of these patients had bilateral ureteral stents placed, and the remaining 12 had a unilateral ureteral stent placed. The renal function and overall survival (OS) were analyzed between these two groups. RESULTS: Among all 39 patients, 9 (23.1%) had stent failure. A univariate analysis revealed that causative disease (gastrointestinal cancer vs. others; p = 0.045) and laterality of hydronephrosis (bilateral vs. unilateral; p = 0.05) were associated with stent failure. A multivariate analysis revealed that only age (hazard ratio, 0.938; 95% confidence interval, 0.883-0.996; p = 0.038) was associated with stent failure. A Kaplan-Meier analysis and log-rank test indicated that having a unilateral ureteral stent placed was not correlated with a lower OS rate than having bilateral ureteral stents placed (p = 0.563). Among patients with bilateral hydronephrosis, the increase in the eGFR of those who had bilateral ureteral stents placed was not significantly different from that of those who had a unilateral ureteral stent placed (p = 0.152). CONCLUSIONS: We revealed that age > 60 years was helpful for predicting stent failure. MUO due to gastrointestinal cancer and bilateral hydronephrosis may be predictive of stent failure. These factors may help urologists decide the optimal time to perform early percutaneous nephrostomy. These findings suggest that patients with bilateral hydronephrosis do not necessarily need to have a ureteral stent placed into both sides of the hydronephrosis.

PD-1 and PD-L1 are more highly expressed in high-grade bladder cancer than in low-grade cases: PD-L1 might function as a mediator of stage progression in bladder cancer.

BACKGROUND: Bladder cancers have been characterized as a tumor group in which the immunological response is relatively well preserved. Programmed death ligand 1 (PD-L1, B7-H1, CD274) has been shown to be expressed in several malignancies, including bladder cancer. However, the clinicopathological impact of this biomarker has not yet been established. In the present study, a quantitative real-time polymerase chain reaction (qPCR) was performed using paired normal and cancerous bladder cancer tissue to investigate PD-1/PD-L1 gene expression. METHODS: We examined the mRNA expression of PD-1/PD-L1 by a qPCR using 58 pairs of normal and cancerous human bladder tissue specimens. We also examined the correlation with the expressions of the STAT1 and NFAT genes, which are thought to be upstream and downstream of the PD-L1 pathway, respectively. RESULTS: There were no significant differences between normal and cancerous tissue in the expression of the PD-1 and PD-L1 genes (p = 0.724 and p = 0.102, respectively). However, PD-1 and PD-L1 were both more highly expressed in high-grade bladder cancer than in low-grade bladder cancer (p < 0.050 and p < 0.010). PD-L1 was positively correlated with the expressions of both the STAT1 (r = 0.681, p < 0.001) and the NFATc1 genes (r = 0.444. p < 0.001). CONCLUSIONS: PD-1 and PD-L1 might be a new biomarker that correlates with the pathological grade of bladder cancer. PD-L1 might function as a mediator of stage progression in bladder cancer and STAT1-NFAT pathway might associate this function.

The neutrophil-to-lymphocyte ratio (NLR) predicts adrenocortical carcinoma and is correlated with the prognosis.

BACKGROUND: The neutrophil-to-lymphocyte ratio (NLR) is reported as a biomarker for some solid malignant diseases. Thus far, however, no reports of the relationship between the NLR and adrenal tumors have been published. We analyzed the utility of the preoperative NLR as a biomarker for predicting the prognosis or diagnosis of malignant disease. METHODS: A total of 59 patients with adrenal tumors (13 cases of malignant disease and 46 with benign disease) were analyzed in this study from February 2004 to June 2015 at our institute. The NLR was obtained just before adrenalectomy. The diagnosis of adrenal tumor was confirmed by a pathological examination of surgical specimens. RESULTS: The NLR in malignant adrenal tumor specimens was significantly higher than in non-malignant specimens (p = 0.028). Adrenocortical carcinoma (ACC) showed the highest NLR among all adrenal tumors. In ACC, the higher NLR group (NLR ≥ 5) showed a significantly poorer overall survival than the lower NLR group (NLR < 5) (p = 0.032). CONCLUSIONS: In adrenal tumors, a higher NLR indicates a higher incidence of malignancy. The NLR might be a new biomarker for predicting the prognosis of adrenal tumor patients.

A low psoas muscle volume correlates with a longer hospitalization after radical cystectomy.

BACKGROUND: Recently, sarcopenia has been reported as a new predictor for patient outcomes or likelihood of post-operative complications. The purpose of this study was to evaluate the association of the psoas muscle volume with the length of hospitalization among patients undergoing radical cystectomy. METHODS: A total of 63 (80.8%) male patients and 15 (19.2%) female patients who underwent radical cystectomy for their bladder cancer in our institution from 2000 to 2015 were analyzed. The psoas muscle index (PMI) was calculated by normalizing the psoas muscle area calculated using axial computed tomography at the level of the umbilicus (cm2) by the square of the body height (m2). Longer hospitalization was defined as hospitalization exceeding 30 days after surgery. RESULTS: The median PMIs (mean ± standard deviation) were 391 (394 ± 92.1) and 271 (278 ± 92.6) cm2/m2 in men and women, respectively. Thus, the PMIs of male patients were significantly larger than those of females (p < 0.001). Based on the differences in gender, we analyzed 63 male patients for a further analysis. In male patients, those hospitalized longer showed a significantly smaller PMI than those normally discharged (377 ± 93.1 vs. 425 ± 83.4; p = 0.04). Similarly, male patients with a small PMI (<400) had a significantly worse overall survival (p = 0.02) than those with a large PMI (≥400). CONCLUSIONS: The presence of sarcopenia was found to be associated with significantly longer hospitalization after radical cystectomy in male patients. Furthermore, in men, a PMI <400 may suggest a significantly worse prognosis.

Prediction of Time to Castration-Resistant Prostate Cancer Using Bone Scan Index in Men with Metastatic Hormone-Sensitive Prostate Cancer.

INTRODUCTION: We evaluated bone scan index (BSI) as a predictive biomarker for time to castration-resistant prostate cancer (CRPC) in patients with metastatic hormone-sensitive prostate cancer (mHSPC). MATERIALS AND METHODS: We identified 85 consecutive mHSPC patients treated with first-line androgen deprivation therapy. We analyzed the correlations between time to CRPC and clinicopathological characteristics, including age, prostate-specific antigen (PSA) level, Gleason score, clinical TNM stage, hemoglobin, lactate dehydrogenase, C-reactive protein, and BSI. RESULTS: The median BSI was 2.7%. Progression to CRPC occurred in 55 (64.7%) patients and the median time to CRPC was 12.9 months. In multivariate analysis, 3 significant risk factors for time to CRPC were identified: age (>73 vs. ≤73 years; hazard ratio [HR] 0.53), p = 0.038, PSA level (>270 vs. ≤270 ng/mL; HR 0.53, p = 0.038), and BSI (>2.7 vs. ≤2.7%; HR 2.97, p < 0.001). CONCLUSION: Age, PSA level, and BSI were found to be significant predictive factors for time to CRPC in patients with mHSPC.

[Transurethral Injection Using Deflux for Vesicoureteral Reflux in Three Adult Women with Frequent Febrile Urinary Tract Infections].

We report three patients with frequent febrile urinary tract infections (fUTI) who underwent transurethral injection therapy with Deflux for vesicoureteral reflux (VUR). The first case was in a 52-yearold woman who was initially diagnosed with right grade II and left grade I VUR at 18 years of age. She frequently experienced fUTI due to VUR. The second case was in a 29-year-old woman. At age 23,she was diagnosed with right grade III VUR when she developed fUTI. After that,she repeatedly developed fUTI. The third case was in a 40-year-old woman who had frequently experienced fUTI since 25 years of age and had gradually become antibiotics-resistant. She was diagnosed with right grade III VUR when she was referred to our hospital. No visible reflux was confirmed by postoperative voiding cystourethrography after the patients underwent transurethral injection using Deflux. One patient developed fUTI once after surgery,but there were no perioperative complications and no recurrences. Transurethral injection using Deflux for VUR might therefore be safe and effective for treating VUR in adult female patients.

Prognostic value of the bone scan index using a computer-aided diagnosis system for bone scans in hormone-naive prostate cancer patients with bone metastases.

BACKGROUND: The bone scan index (BSI) using a computer-aided diagnosis system for bone scans is expected to be an objective and quantitative clinical tool for evaluating bone metastatic prostate cancer. This study aimed to evaluate the pretreatment BSI as a prognostic factor in hormone-naive prostate cancer patients with bone metastases. METHODS: The study included 60 patients with hormone-naive, bone metastatic prostate cancer that was initially treated with combined androgen blockade therapy. The BONENAVI system was used for calculating the BSI. We evaluated the correlation between overall survival (OS) and pretreatment clinicopathological characteristics, including patients' age, initial prostate-specific antigen (PSA) value, Gleason scores, clinical TNM stage, and the BSI. Cox proportional hazards regression models were used for statistical analysis. RESULTS: The median follow-up duration was 21.4 months. Clinical or PSA progression occurred in 37 (61.7%) patients and 18 (30.0%) received docetaxel. Death occurred in 16 (26.7%) patients. Of these deaths, 15 (25.0%) were due to prostate cancer. The median OS was not reached. In multivariate analysis, age and the BSI were independent prognostic factors for OS. We evaluated the discriminatory ability of our models, including or excluding BSI by quantifying the C-index. The BSI improved the C-index from 0.751 to 0.801 for OS. Median OS was not reached in patients with a BSI ≤ 1.9 and median OS was 34.8 months in patients with a BSI >1.9 (p = 0.039). CONCLUSIONS: The pretreatment BSI and patients' age are independent prognostic factors for patients with hormone-naive, bone metastatic prostate cancer.

Prognostic value of a computer-aided diagnosis system involving bone scans among men treated with docetaxel for metastatic castration-resistant prostate cancer.

BACKGROUND: The bone scan index (BSI), which is obtained using a computer-aided bone scan evaluation system, is anticipated to become an objective and quantitative clinical tool for evaluating bone metastases in prostate cancer. Here, we assessed the usefulness of the BSI as a prognostic factor in patients with metastatic castration-resistant prostate cancer (mCRPC) treated using docetaxel. METHODS: We analyzed 41 patients who received docetaxel for mCRPC. The Bonenavi system was used as the calculation program for the BSI. The utility of the BSI as a predictor of overall survival (OS) after docetaxel was evaluated. The Cox proportional hazards model was used to investigate the association between clinical variables obtained at docetaxel treatment, namely PSA, patient age, liver metastasis, local therapy, hemoglobin (Hb), lactase dehydrogenase (LDH), albumin (Alb), PSA doubling time, and BSI and OS. RESULTS: The median OS after docetaxel therapy was 17.7 months. Death occurred in 22 (53.7%) patients; all deaths were caused by prostate cancer. In multivariate analysis, three factors were identified as significant independent prognostic biomarkers for OS after docetaxel; these were liver metastases (yes vs no; HR, 3.681; p = 0.026), Alb (<3.9 vs ≥ 3.9; HR, 3.776; p = 0.020), and BSI (>1% vs ≤ 1%; HR, 3.356; p = 0.037). We evaluated the discriminatory ability of our models including or excluding the BSI by quantifying the c-index. The BSI improved the c-index from 0.758 to 0.769 for OS after docetaxel. CRPC patients with a BSI >1 had a significantly shorter OS than patients with a BSI ≤ 1 (p = 0.029). CONCLUSIONS: The BSI, liver metastases and Alb were independent prognostic factors for OS after docetaxel. The BSI might be a useful tool for risk stratification of mCRPC patients undergoing docetaxel treatment.

Pretreatment neutrophil-to-lymphocyte ratio predicts the prognosis in patients with metastatic prostate cancer.

BACKGROUND: The neutrophil-to-lymphocyte ratio (NLR), a simple marker of the systemic inflammatory response in critical care patients, has been suggested as an independent prognostic factor for several solid malignancies. We investigated the utility of pretreatment NLR as a prognosticator in patients who presented with metastatic prostate cancer. METHODS: We first investigated the correlation between NLR and prostate-specific antigen (PSA) levels in 1464 men who had both tests and were found to have prostate cancer on their biopsies at our institution from 1999 to 2015. We then assessed the relationship between pretreatment NLR and the prognosis in 48 patients who were diagnosed with prostate cancer metastasized to the lymph node and/or bone. RESULTS: The NLR value was significantly elevated in men with higher PSA than in those with lower PSA (p < 0.001). In patients with metastatic prostate cancer, NLR (cut-off point of 3.37 determined by the AUROC curve) was correlated with both cancer-specific (p = 0.018) and overall (p = 0.008) survivals. CONCLUSIONS: Pretreatment NLR may function as a new biomarker that precisely predicts the prognosis in patients with metastatic prostate cancer.

Increased neutrophil-to-lymphocyte ratio is associated with disease-specific mortality in patients with penile cancer.

BACKGROUND: The neutrophil-to-lymphocyte ratio (NLR), a simple marker of the systemic inflammatory response, has been demonstrated to correlate with patient outcomes for various solid malignancies. We investigated the utility of the pretreatment NLR as a prognosticator in patients who presented with penile cancer. METHODS: A total of 41 patients who underwent complete blood count with differential and subsequent radical penectomy from 1988 to 2014 were analyzed. We assessed the correlation between the NLR and the prognosis of penile cancer. RESULTS: The median and mean (± SD) NLRs in 41 penile cancer patients were 3.42 and 5.03 ± 4.99, respectively. Based on the area under receiver operator characteristic curve, the cut-off value of NLR was determined to be 2.82. Patients with a high NLR (≥2.82) showed a significantly poorer cancer-specific survival (p = 0.023) than those with a low NLR. CONCLUSIONS: The pretreatment NLR may function as a biomarker that precisely predicts the prognosis in patients with penile cancer.

Predictors of poor response to secondary alternative antiandrogen therapy with flutamide in metastatic castration-resistant prostate cancer.

OBJECTIVE: In Japan, flutamide had been commonly used as second-line alternative antiandrogen hormonal therapy for metastatic castration-resistant prostate cancer that relapses after initial hormone therapy before new androgen pathway inhibitors became available. In this study, we attempted to identify predictive factors for efficacy of alternative antiandrogen as second-line hormone therapy. METHODS: We identified consecutive 65 patients with metastatic castration-resistant prostate cancer who were treated with alternative antiandrogen as second-line hormonal therapy (bicalutamide to flutamide). All patients were treated with combined androgen blockade initially. We analyzed correlations between progression-free survival of alternative antiandrogen and clinicopathological characteristics, including patients' ages, initial prostate-specific antigen levels, prostate-specific antigen levels at flutamide induction, Gleason scores, T stage, N stage, extent of disease grades on bone scan and previous duration of prostate cancer response to combined androgen blockade. RESULTS: In univariate analysis, T stage, N stage and previous duration of response to combined androgen blockade were correlated with shorter progression-free survival. We found four significant risk factors for shorter progression-free survival in multivariate analysis: initial prostate-specific antigen level, clinical N stage, extent of disease grades and previous duration of response to combined androgen blockade. CONCLUSIONS: Initial prostate-specific antigen, N stage, extent of disease grades on bone scan and previous duration of response to combined androgen blockade were the significant predictors for efficacy of alternative antiandrogen as second-line hormone therapy in patients with metastatic castration-resistant prostate cancer. These findings might support that decision-making of when to start the new androgen receptor pathway inhibitors.

[The Diagnostic Value of Pre-Biopsy Magnetic Resonance Imaging (MRI) for Detecting Prostate Cancer].

We examined the value of pre-biopsy magnetic resonance imaging (MRI) for detecting prostate cancer. We analyzed 267 men with prostate-specific antigen (PSA) levels of 3-10 ng/ml who underwent systematic prostate needle biopsy. From April 2009 to March 2011, a total of 98 male patients underwent 16-core prostatic biopsies without pre-biopsy magnetic resonance imaging (MRI) (nonenforcement group). From April 2011 to March 2013, 169 men underwent pre-biopsy MRI [T2-weighted imaging (T2WI) and diffusion-weighted imaging (DWI)] (enforcement group). When MRI findings indicated cancer in the latter group, in addition to the systematic 16-core biopsy one or two targeted biopsies were performed. Patients without suspicious MRI findings underwent only systematic 16-core biopsy. Cancer detection rates in the nonenforcement and enforcement groups were 42.9% (48/92) and 46. 2% (78/169), respectively. The difference did not reach significance (p＝0.612). Although the cancer detection rates were 39.4% (41/104) in the MRI-negative group and 56. 9% (37/65) in the MRI-positive group (p＝0.039), the sensitivity and specificity for cancer detection by MRI were relatively low: 47.4% and 69.2%, respectively. By receiver-operating curve analysis, the area under the curve for cancer detection by MRI was only 0.583. There were two study limitations. First, the patient sample size was small. Second, it is unclear whether an adequate sample of the suspicious lesion was obtained by biopsy. We thus demonstrated that it might be improper to base a diagnosis solely on pre-biopsy MRI (T2WI and DWI) findings in men with serum PSA levels of 3-10 ng/ml.

[Severe Hyponatremia after Cisplatin-Based Chemotherapy : Two Case Reports].

Hyponatremia is one of the common electrolyte disorders associated with cisplatin (CDDP) administration. We report here two cases of hyponatremia associated with CDDP. Case 1 : A 75-year-old man with urothelial carcinoma of bladder (cT3N1M0) underwent neoadjuvant chemotherapy with CDDP and gemcitabine. He lost consciousness on the eighth day after the chemotherapy. Blood tests showed severe hyponatremia (Na 113 mEq/l), low plasma osmolality and high level of plasma vasopressin. Urine tests showed low osmolality. These findings were consistent with the syndrome of inappropriate antidiuretic hormone hypersecretion (SIADH). His consciousness level was improved after saline infusion and fluid restriction. Case 2 : A 54-year-old man with penile cancer (cT3N2M0) underwent neoadjuvant chemotherapy with CDDP, paclitaxel and fluorouracil. He lost consciousness on the seventh day after the chemotherapy. Blood tests showed hyponatremia(Na 121 mEq/l) with renal dysfunction. We concluded that the hyponatremia is due to the renal salt wasting syndrome (RSWS) based on renal dysfunction and high urinary sodium excretion. His consciousness level was improved after saline infusion. Although it is difficult to distinguish between SIADH and RSWS, correct evaluation is necessary for appropriate management of hyponatremia after CDDP administration.

PHEOCHROMOCYTOMA DURING PREGNANCY-2 CASE REPORTS.

(Introduction) A pheochromocytoma diagnosed during pregnancy is rare, and also its fetal and maternal mortality is high if undiagnosed. We report two cases with successful pregnancy outcome with pheochromocytoma. (Case 1) A 31-years-old previously healthy woman presented at 19 week period of gestation with high blood pressure. High urine catecholamine level and a left adrenal mass recognized by magnetic resonance imaging (MRI) confirmed adrenal pheochromocytoma. The patient had good blood pressure control after we started doxazosin 4 mg daily, and Caesarean section was performed at 35 week period of gestation. Two months after delivery, laparoscopic adrenalectomy was performed and she was discharged in the absence of hypertension. (Case 2) A 31-years-old previously healthy woman presented at 29 week period of gestation with exacerbation of headache and palpitation. High urine catecholamine level and a mass recognized close to the inferior vena cava by MRI confirmed extraadrenal pheochromocytoma. The patient had good blood pressure after we started doxazosin 4 mg daily and labetalol hydrochloride 200 mg daily. Caesarean section was performed at 35 week period of gestation. One month after delivery, laparotomic resection of the tumor was performed. Seven years later, hypertension reoccurred and there was an extraadrenal pheochromocytoma recurrence. We had a laparotomic resection for the recurrent tumor, and now she is in the absence of hypertension. (Conclusion) Pheochromocytoma should be considered as a differential diagnosis in a case of high blood pressure occurred during pregnancy. Early detection and appropriate treatment is crucial to reduce fetal and maternal mortality.

Renal perfusional cortex volume for arterial input function measured by semiautomatic segmentation technique using MDCT angiographic data with 0.5-mm collimation.

OBJECTIVE: The purpose of this study was to evaluate the usefulness of renal perfusional cortex volume for arterial input function. MATERIALS AND METHODS: This retrospective study included 45 potential kidney donors--33 patients with aortic dissection and 12 patients with renovascular hypertension--who underwent both MDCT angiography with 0.5-mm collimation and renal (99m)Tc-diethylenetriamine pentaacetic acid (DTPA) scanning using the modified Gates method. Each perfusional cortex volume for the arterial input function and parenchymal volume was measured by semiautomatic segmentation using the region-growing technique. Linear regression analysis and correlation coefficients were used to assess the impact of the cortical volume, parenchymal volume, and renal scanning glomerular filtration rate (GFR) on estimated GFR (eGFR) using a modified Modification of Diet in Renal Disease (MDRD) equation. RESULTS: The correlation coefficient was higher for the total renal DTPA GFR adjusted for body surface area, weight-adjusted perfusion cortex volume, and adjusted total parenchyma volume in rank (r = 0.712, 0.642, 0.510, respectively, p< 0.0001 for each). The coefficient of the right renal perfusional cortex volume percent with a mean value of 52.1% ± 10.1% was 0.826 (p < 0.0001) for the right renal DTPA GFR percent with a mean value of 51.0% ± 12.1% (range, 22.0-89.5%), although the value for the right renal parenchymal volume percent with a mean value of 49.5% ± 5.5% was 0.764 (p < 0.0001). CONCLUSION: Weight-adjusted perfusional cortex volume for arterial input function can be measured clinically and may replace renal DTPA scanning using the modified Gates method.

[KIDNEY TRANSPLANTATION IN A PATIENT WITH AN INDIANA POUCH: A CASE REPORT].

Kidney transplantation with an Indiana pouch is very rare, and a case report about it has not been found. This is our report about a successful case of kidney transplantation in a patient with an Indiana pouch. A 32 year-old woman with end stage renal failure was referred to our hospital for living related kidney transplantation. She had undergone an Indiana pouch diversion, due to a neurogenic bladder with spina bifida and renal dysfunction, 11 years ago. However, her kidney function gradually deteriorated, and finally she was started on hemodialysis six months ago. We performed living related kidney transplantation from her mother. We transplanted a graft into her right fossa iliaca and made an anastomosis between a graft ureter and an Indiana pouch. Her postoperative course was uneventful with good graft function. Now 1 year after transplantation, she maintains good graft function without urinary tract infection dor rejection.

Comparison of Urinary Liver Fatty Acid Binding Protein Level and Pathologic Biopsy Findings 1 Year After Kidney Transplantation.

BACKGROUND: For the early detection of abnormal findings considering for therapeutic intervention, we regularly undertake protocol renal allograft biopsy at 1 year after kidney transplantation (KT). We examined whether urinary liver fatty acid binding protein (L-FABP) level predicts some pathologic findings of renal allograft. METHODS: We retrospectively enrolled recipients with stable graft function who routinely were biopsied renal allograft specimens 1 year after KT between January 2015 and May 2021 in our center. We assessed the association urinary L-FABP level with pathologic findings of renal allograft biopsies. RESULTS: We enrolled 56 recipients in this study. Their median age at KT was 49.5 and their median serum creatinine at 1 year after KT was 1.22 mg/dL. In 9 of 56 patients, abnormal high value of urinary L-FABP were observed. All of them had abnormal findings pathologically in the renal allografts (border line change 3, medullary ray injury [MRI] with calcineurin inhibitor toxicity [CNI-T] 1, MRI without CNI-T 1, CNI-T with IgA deposition 1, and BK virus nephropathy 3). On the other hand, 30 of 47 patients with normal value of urinary LFABP had no pathologically abnormal findings. Both specificity and positive predictive value of urinary L-FABP for pathologic findings were 100.0༅. CONCLUSIONS: Our results suggest that patients with renal transplant with elevated urinary L-FABP levels might benefit from renal allograft biopsy. Comparison of urinary liver fatty acid binding protein level and pathologic biopsy findings 1 year after KT.

A diagnostically challenging case of inflammatory myofibroblastic tumor primary to the peritoneum.

Introduction: Inflammatory myofibroblastic tumors are difficult to diagnose because of the lack of specific indicators. We describe a diagnostically challenging case of an inflammatory myofibroblastic tumor primary to the peritoneum. Case presentation: The patient was a 25-year-old male who presented at our hospital with lower abdominal pain. Computed tomography revealed a mass lesion 80 mm in diameter just above the bladder. This was suspected to be a bleeding tumor of the urachus. Since malignancy could not be ruled out, surgery was planned. This revealed a fragile tumor arising from the peritoneum. Following its removal, the tumor was diagnosed by histopathological analysis as an inflammatory myofibroblastic tumor. Conclusion: We describe a case of inflammatory myofibroblastic tumor primary to the peritoneum diagnosed by histopathology. Inflammatory myofibroblastic tumor should be considered in the differential diagnosis of abdominal wall and anterior bladder tumors.