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Yoshiyuki Matsui

Publications and source records attributed to Yoshiyuki Matsui.

At least 19 recordsLinked to original sources
PubMed2026

Proteomic Analysis Identifies Potential Biomarkers of ELOC -Mutated Renal Cell Carcinoma.

ELOC -mutated renal cell carcinoma (RCC) is a rare tumor with only ∼40 cases reported to date; it shares a molecular background with clear cell RCC (ccRCC) in terms of hypoxia-inducible factor-alpha (HIF-α) protein accumulation. ELOC -mutated RCC is characterized by prominent leiomyomatous stromal growth and a more indolent clinical course compared with ccRCC. In our previous study, whole-genome sequencing of 102 ccRCC cases identified 5 cases of ELOC -mutated RCC. In the present study, we conducted proteomic and immunohistochemical analyses on up to 13 Japanese ELOC -mutated RCCs, including 8 previously reported cases, to elucidate its distinct molecular mechanisms and identify biomarkers that may be useful in distinguishing ELOC -mutated RCC from ccRCC. Proteomic profiling revealed that molecules, including cytokeratin 7, scinderin (SCIN), and sortilin 1 (SORT1), were significantly overexpressed in ELOC -mutated RCC compared with ccRCC. Notably, SCIN and SORT1 emerged as novel potential diagnostic biomarkers for distinguishing ELOC -mutated RCC from ccRCC. The analysis further suggested that ELOC -mutated RCC relies more on oxidative phosphorylation and less on glycolysis than ccRCC. This metabolic shift may be linked to the relative depletion of NAD+ due to the low expression of NAPRT and QPRT. In addition, we observed geographic variation in the disease frequency among different cohorts, with a higher frequency in Japan. Our findings provide novel insights into the pathogenesis of ELOC -mutated RCC and highlight SCIN and SORT1 as potential supportive biomarkers.

Humans↗
PubMed2006

Evaluation for surrogacy of end points by using data from observational studies: tumor downstaging for evaluating neoadjuvant chemotherapy in invasive bladder cancer.

PURPOSE: In clinical cancer trials for evaluating neoadjuvant chemotherapy, tumor downstaging is frequently used as a surrogate end point for overall survival. We evaluated the surrogacy of tumor downstaging using data from a follow-up observational study in bladder cancer. EXPERIMENTAL DESIGN: A total of 586 patients (from 32 Japanese hospitals) who underwent radical cystectomy for invasive bladder cancer (clinical T2 to T4) between 1990 and 2000 were analyzed. We considered changes over time in clinical stage at diagnosis and pathologic stage at cystectomy as a surrogate end point, and survival time after cystectomy as a true end point. First, we developed a new criterion for tumor downstaging. Second, we statistically evaluated surrogacy for the criterion using Prentice's criteria. RESULTS: To develop the criterion of end points based on tumor downstaging, we selected the best classification among all possible classifications in an attempt to separate prognosis for patients. The hazard ratios after adjustment for prognostic factors in the intermediate effect patients and the poor effect patients were 1.9 (95% confidence interval, 1.0-3.7) and 5.0 (95% confidence interval, 2.6-9.8), respectively, compared with that in the good effect patients. The conditions for correlation and conditional independency of Prentice's criteria were satisfied approximately. Neoadjuvant chemotherapy has a statistically significant tumor downstaging effect, whereas there was no difference on survival between treatment groups. CONCLUSIONS: The tumor downstaging effect could be an appropriate intermediate end point for screening novel neoadjuvant chemotherapy for invasive bladder cancer. The dataset from follow-up studies were useful for evaluating the surrogacy of end points.

Adult↗
PubMed2005

Risk stratification after radical prostatectomy in men with pathologically organ-confined prostate cancer using volume-weighted mean nuclear volume.

OBJECTIVE: We examined the impact of volume-weighted mean nuclear volume (MNV) on biochemical failure after radical prostatectomy (RP) in pathologically organ-confined prostate cancer (PC) and developed a prognostic factor-based stratification model for these patients. PATIENTS AND METHODS: We analyzed 141 patients with pathologically organ-confined PC treated solely with RP. Unbiased estimates of MNV were calculated from biopsy specimens based on a stereological method, and compared with other clinical and pathologic findings including patient age, pre-treatment PSA, biopsy and RP specimen Gleason score, pathologic stage, total cancer volume, index cancer volume, tumor differentiation, number of tumor foci, main tumor location, and surgical margin status, with regard to prediction of disease outcome after RP using Cox proportional hazard models. RESULTS: The median follow-up was 38.6 months (range 4--119 months). Twenty patients (14.2%) experienced biochemical failure. On multivariate analysis, MNV was demonstrated to be an independent prognostic factor, along with pre-treatment PSA and total cancer volume (P=0.0004, 0.0184, and 0.0285, respectively). All patients were stratified into three groups according to their prognostic scores developed on the basis of multivariate analysis, with statistically significant prognostic differences revealed for each of the between-group comparisons. CONCLUSION: The results demonstrated that estimates of MNV contribute most significantly to the prediction of biochemical control of pathologically organ-confined PC. The combination of MNV with other independent predictors such as pre-treatment PSA and total cancer volume provided a statistically verifiable basis for risk stratification, facilitating more accurate prediction of disease outcome.

Aged↗
PubMed2005

Use of complementary and alternative medicine by patients with urologic cancer: a prospective study at a single Japanese institution.

OBJECTIVES: We prospectively evaluated the prevalence and predictors of complementary medicine (CAM) use among Japanese patients with urologic cancer 1 year after diagnosis. PATIENTS AND METHODS: A total of 349 patients with newly diagnosed urologic cancer answered a self-administered questionnaire on CAM use 1 year after diagnosis. General-health-related quality of life (GHQL) of the patients was also assessed at diagnosis and 1 year after diagnosis using the Medical Outcome Study Short Form-36 (SF-36). The overall prevalence, types of CAM used, and costs of CAM were assessed. The effects of several variables including GHQL at baseline and 1 year after treatment on the prevalence of use of CAM were evaluated. RESULTS: A total of 164 respondents (47%) admitted using some type of CAM, of which 73 (45%) had used multiple types. "Health food," in particular extract from Agaricus blazei, was the most common type of CAM used. CAM users had significantly lower scores for social function, general health perception, and vitality domains than CAM non-users 1 year after diagnosis. This tendency was more marked in users of multiple types of CAM. CONCLUSIONS: "Health food," including extract from A. blazei, was the most commonly used CAM in Japan. The prevalence of CAM use did not differ between patients with prostate cancer and those with urologic cancer other than prostate cancer. CAM users, especially those who used multiple types of CAM, had lower GHQL scores than non-users of CAM.

Adult↗
PubMed2005

The current status of perioperative chemotherapy for invasive bladder cancer: a multiinstitutional retrospective study in Japan.

BACKGROUND: We conducted a multiinstitutional analysis to clarify the clinical significance of perioperative chemotherapy, in invasive bladder cancers in Japan, and to identify the patient subpopulations who could benefit from perioperative chemotherapy. METHODS: A total of 913 consecutive patients aged less than 80 years who underwent radical cystectomy for invasive bladder cancer from 1990 to 2000 at 32 Japanese hospitals were retrospectively analyzed. Median follow-up was 3.8 years (range, 0.1 to 11.8 years). RESULTS: In total, 341 patients (37.3%) were treated with perioperative chemotherapy, including neoadjuvant chemotherapy (n = 174), adjuvant chemotherapy (n = 114), or a combination of both chemotherapies (n = 53). With cisplatin-based combination chemotherapy, the MVAC (methotrexate, vinblastine, doxorubicin, and cisplatin) regimen was the one most frequently used for perioperative chemotherapy, but the average number of cycles was distinctly less than that in reported randomized trials. MEC (methotrexate, epirubicin, and cisplatin) chemotherapy had efficacy similar to that of the MVAC regimen. On analysis of patients stratified by stage, the overall survival of patients with adjuvant chemotherapy was significantly better than that of those without adjuvant chemotherapy, in patients with pT2b, pN0 or pT3, pN0 (P = 0.016 or 0.020, respectively), but adjuvant chemotherapy had no, or the opposite, effect on patients with pT2a, pN0, pT4, pN0, or pTany, pN+. On the other hand, neoadjuvant chemotherapy provided a statistically significant survival benefit only for patients with clinical T3N0 (P = 0.015). Of note, in the high-risk subgroup, the overall survival rate for patients with complete response (CR) after neoadjuvant chemotherapy was significantly better than that of patients with partial response (PR) or no change (NC)/progressive disease (PD) (P = 0.043). CONCLUSION: In Japan, cisplatin-based combination chemotherapy has been the main modality adopted perioperatively for high-risk patients with radical cystectomy. This study's clinical results indicated that perioperative chemotherapy may improve survival in patients with T3N0 or pT2b/pT3, pN0 bladder cancer.

Adult↗
PubMed2005

Risk factors for subsequent development of bladder cancer after primary transitional cell carcinoma of the upper urinary tract.

OBJECTIVES: To determine the independent risk factors for intravesical tumor recurrence in patients with primary transitional cell carcinoma of the upper urinary tract, and to develop a risk-stratification model to allow more accurate prediction of recurrence risk. METHODS: Of 141 patients who underwent total nephroureterectomy for clinically localized transitional cell carcinoma of the upper urinary tract, the data from 89 patients were retrospectively reviewed. Patients with a previous history or concomitance of bladder cancer and/or a follow-up period of less than 1 year were excluded from this study. Multivariate analysis by Cox's proportional hazards model was used to determine independent risk factors for intravesical tumor recurrence. RESULTS: Of 89 patients, 37 (41.6%) experienced subsequent intravesical tumor recurrence during a median follow-up period of 39.7 months (range 12.0 to 186.6). On multivariate analysis, tumor multiplicity, pathologic stage, tumor size, and surgical modality had a statistically significant impact on the risk of intravesical tumor recurrence (P = 0.0075, P = 0.0221, P = 0.0377, and P = 0.0413, respectively). Pathologic stage and tumor size were inversely correlated to the risk. A scoring system for the risk of intravesical recurrence was developed from the proposed prognostic factors, and the patients were stratified into three groups according to their scores, with statistically significant prognostic differences between them (P = 0.0018). CONCLUSIONS: Tumor multiplicity, pathologic stage, tumor size, and surgical modality all had a significant impact on the incidence of intravesical tumor recurrence. A risk stratification model constructed from tumor biologic factors may be useful in the follow-up of patients with transitional cell carcinoma of the upper urinary tract.

Aged↗
PubMed2005

Impact of superficial bladder cancer and transurethral resection on general health-related quality of life: an SF-36 survey.

OBJECTIVES: To assess the general health-related quality of life (GHQOL) of patients with superficial bladder cancer who underwent transurethral resection (TUR). METHODS: We assessed the GHQOL a total of 178 times for 133 patients with superficial bladder cancer before multiple TURs. The GHQOL was assessed using the Medical Outcome Study Short-Form 36-item survey (SF-36). Ninety-three patients answered the questionnaire at the first TUR, 34 at the second TUR, 17 at the third TUR, and 34 at the fourth or later TUR. RESULTS: Compared with age-matched and sex-matched Japanese norms, the general health perception was severely impaired in patients with superficial bladder cancer. Their mental health was also severely impaired at the first TUR, but gradually returned to normal as TUR was repeated. The scores of physical functioning, social functioning, and role-emotional demonstrated a nadir at the second or third TUR, and increased thereafter if TUR was repeated four or more times. Intravesical treatment for prevention of recurrence increased the score of bodily pain. CONCLUSIONS: Although superficial bladder cancer is not frequently lethal, patients with this disease believed their general health was much impaired. Only two domains of bodily pain and vitality had no negative impact from this disease. As urologists, we should notice the considerable affect of superficial bladder cancer on the GHQOL of patients.

Aged↗
PubMed2005

Lymphoepithelioma-like carcinoma of the ureter.

Lymphoepithelioma-like carcinoma is an undifferentiated epithelial tumor with a prominent lymphocytic infiltrate and is rarely seen in the upper urinary tract. Only 3 and 2 cases involving the ureter and renal pelvis, respectively, have been reported. We report the fourth documented case of lymphoepithelioma-like carcinoma of the ureter. Tumor cells were immunoreactive to cytokeratin and negative for Epstein-Barr virus. Our patient was disease free 30 months after nephroureterectomy. The prognosis is favorable for pure lymphoepithelioma-like carcinoma of the upper urinary tract.

Aged↗
PubMed2005

Emergency drainage for urosepsis associated with upper urinary tract calculi.

PURPOSE: We examined the characteristics of patients with urosepsis associated with upper urinary tract calculi requiring emergency drainage. MATERIALS AND METHODS: From January 1994 to December 2003, 424 patients were admitted to our urological department a total of 473 times for treatment of upper urinary tract calculi, of whom 53 required a total of 59 emergency drainage procedures for urosepsis. We summarized the characteristics of these patients and events, and determined risk factors for emergency drainage using logistic regression analysis. RESULTS: In 14 events (24%) intensive management, such as the use of vasopressors and anticoagulants, was performed. Transient thrombocytopenia less than 100,000/mm occurred in 18 events (31%). Hyperbilirubinemia occurred in 8 of 38 events (16%) without prior antibiotic therapy. One patient (2%) died of urosepsis. Patients with calculi who underwent emergency drainage required a longer hospital stay than those without emergency drainage (25.2 vs 14.8 days, p <0.001). Of the variables analyzed poor performance status (Karnofsky performance status 70% or less, OR 2.9, p = 0.003), age 75 years or older (OR 2.1, p = 0.038) and female sex (OR 1.8, p = 0.046) were risk factors on multivariate analysis. CONCLUSIONS: Our findings suggest that the frequency of emergency drainage in elderly patients with poor performance status has increased in recent years, at least in our rural area of Japan. Preventing calculous formation and urinary tract infection in individuals with poor performance status will be of considerable importance in the future.

Aged↗
PubMed2005

Alteration of body configuration after retroperitoneoscopic nephrectomy and nephroureterectomy.

OBJECTIVE: To evaluate objective alterations of body configuration in patients who treated with retroperitoneoscopic nephrectomy (RN) and retroperitoneoscopy-assisted nephroureterectomy (RAN). PATIENTS AND METHODS: Twenty-six patients who had RN and 23 RAN were eligible for the study. Abdominal computed tomography films before and after surgery were evaluated. The intra-abdominal content surrounded by the vertebral bones and the muscles forming the trunk of the body were divided into four subspaces. The areas of these four portions were measured, and the ratio of occupation of each portion calculated before compared with that obtained after surgery. RESULTS: While RAN had little impact on body configuration, RN significantly affected it; after RN the total area and area of ventral subspaces decreased homogeneously throughout the L2-L4 levels. The ipsilatero-dorsal subspace had a marked cranial decrease in area and no caudal alteration. CONCLUSIONS: While RAN has little effect on body configuration, RN has a significant effect, as measured objectively. Continuing the skin incision between ports and muscle splitting to extract the specimen is probably responsible for the difference between the findings of RAN and RN.

Abdomen↗
PubMed2005

Salvage radiotherapy for biochemical recurrence after radical prostatectomy.

OBJECTIVE: To evaluate the clinical outcome of salvage radiotherapy (RT) for biochemical recurrence after radical prostatectomy (RP) at our institution. PATIENTS AND METHODS: Between March 1999 and January 2004, 37 patients had salvage RT for prostate-specific antigen (PSA) failure after RP, including eight who had had neoadjuvant hormone therapy. After surgery, PSA was measured with ultrasensitive immunoassays. In all patients RT was delivered to the prostatic bed at a total dose of 60 Gy with a four-field box technique. RESULTS: The median (range) PSA level before salvage RT was 0.146 (0.06-3.216) ng/mL and RT was started at a PSA level of <0.5 ng/mL in 34 of the 37 patients (92%). With a median follow-up of 31.9 (0-69.8), months, 11 patients (30%) had disease progression after RT and the 3- and 5-year progression-free probability was 74% and 54%, respectively. Univariate analysis showed that clinical and pathological tumour stages and PSA level before RT (>0.15 vs < or = 0.15 ng/mL) were significant predictors of disease progression. There were no late adverse events related to RT. CONCLUSION: Salvage RT for biochemical failure after RP at a low PSA level, using ultrasensitive immunoassays for monitoring, is a reasonably effective treatment. A relatively low radiation dose (60 Gy) seems to be effective.

Adenocarcinoma↗
PubMed2005

[The influence over the long-term prognosis of BCG therapy and the surgical treatment in superficial bladder cancer treatment].

From the view point that total cystectomy is important in treatment of carcinoma in situ (CIS) of the bladder, we reviewed the cases showing resistance to bacillus Calmette-Guerin (BCG) among 42 CIS treated with intravesical BCG. Twenty-six cases were cured by BCG treatment. Twelve total cystectomies were done in 16 cases of BCG-resistant CIS of the bladder. Four died with urethral invasion or upper urinary tract recurrence. There was invasion into the prostate in 3 cases. The development of CIS to the upper urinary tract and the prostatic urethra is not rare and this has an influence on the prognosis. In bladder CIS treatment, the inspection to see extravesical progression is necessary. It is important not to delay the radical cystectomy.

Adjuvants, Immunologic↗
PubMed2004

High incidence of inguinal hernia after radical retropubic prostatectomy.

OBJECTIVES: To assess the incidence of, and risk factors for, inguinal hernia after retropubic radical prostatectomy compared with after pelvic lymph node dissection and total cystectomy. METHODS: A total of 155 radical prostatectomies, 35 pelvic lymph node dissections, and 56 total cystectomies were included in this study. We reviewed the charts retrospectively and evaluated the incidence of, and risk factors for, inguinal hernia after surgery using Kaplan-Meier plots and a Cox proportional hazard model. RESULTS: Of 155 patients in the radical prostatectomy group, 35 patients in the pelvic lymph node dissection group, and 56 patients in the cystectomy group, 33 (21.3%), 4 (11.4%), and 3 (5.4%), respectively, developed inguinal hernias during follow-up. In the radical prostatectomy group, 27 (81.8%) of the 33 patients developed inguinal hernia within 2 years postoperatively. Multivariate Cox proportional hazard analysis revealed that prostatectomy group, past history of inguinal hernia, and body mass index of less than 23 were significant risk factors for postoperative inguinal hernia. CONCLUSIONS: The incidence of inguinal hernia after radical prostatectomy is not low. Urologists should realize that inguinal hernia is one of the major complications of radical prostatectomy and examine the groin preoperatively and postoperatively.

Aged↗
PubMed2004

Comparative analysis of lower urinary tract symptoms and bother in both sexes.

OBJECTIVES: To compare the prevalence and severity of lower urinary tract symptoms (LUTS) in Japanese men and women and to analyze the impact on bother in an age-stratified manner. METHODS: A consecutive series of 2328 men (mean age 49.5 years) and 1735 women (mean age 48.3 years) who underwent multiphasic health screening at our institution completed the self-administered International Prostate Symptom Score (IPSS) questionnaire with quality-of-life (QOL) assessment. RESULTS: A significant age-related increase in the IPSSs and QOL scores was observed in both sexes. Age-stratified analysis showed that the total IPSS, voiding symptoms, and QOL score were significantly greater in men than in women, and the storage symptoms were not significantly different between both sexes. The percentage with moderate to severe symptoms (IPSS 8 or greater) among those younger than 40, 40 to 49, 50 to 59, 60 to 69, and 70 years old or older was 7.9%, 12.0%, 23.7%, 32.0%, and 48.7%, respectively, in men and 6.5%, 8.3%, 12.1%, 13.8%, and 31.8%, respectively, in women. Within each category of the severity of IPSS, the distribution of the QOL score was very similar in both sexes, showing no sex difference in the impact of LUTS on bother. CONCLUSIONS: These data showed a similar age-related development of LUTS in both sexes, except that voiding symptoms were more prevalent among men. The impact of LUTS on bother was also comparable between men and women.

Adult↗
PubMed2004

Association of lower urinary tract symptoms with erectile dysfunction in Japanese men.

OBJECTIVES: To assess the age-stratified prevalence of erectile dysfunction (ED) and how lower urinary tract symptoms (LUTS) are associated with ED, and to estimate the correlates of ED among Japanese men. METHODS: A self-administered questionnaire of the International Prostate Symptom Score and the abridged 5-item version of the International Index of Erectile Function were given to 3189 noninstitutionalized men during a multiphasic health screening. The data from 2084 men who provided complete responses to the questionnaire were analyzed. RESULTS: The prevalence of moderate to severe ED increased from 13.4% among those younger than 40 years to 20.6%, 39.9%, and 63.1% among those aged 40 to 49, 50 to 59, and 60 years or older, respectively. Most were dissatisfied with their sex life regardless of age. The severity of ED was significantly associated with moderate to severe International Prostate Symptom Scores (age-adjusted odds ratio 1.52), specifically in the urgency (1.75) and nocturia (1.36) domains, and for those with diabetes mellitus (2.54) and coronary artery disease (8.04). CONCLUSIONS: ED is highly prevalent among Japanese men with LUTS and is significantly associated with the severity of LUTS after controlling for age. This significant aspect of life for men of all ages should be taken into account when treating patients with LUTS.

Adult↗
PubMed2004

Primary localized amyloidosis of urethra: magnetic resonance imaging findings.

Amyloidosis of the urogenital tract is relatively rare. We experienced a case of primary localized amyloidosis of the urethra and report its characteristics on magnetic resonance imaging. In our case, the lesion exhibited low signal intensity on T1-weighted and T2-weighted images and was well-enhanced on gadolinium-enhanced T1-weighted images. The gross appearance on cystoscopic examination suggested urethral malignancy but the low signal intensity is atypical for malignant tissue. Because magnetic resonance imaging clearly demonstrated the local extent and depth of the lesion, it was useful in making our decision to perform conservative resection.

Adult↗
PubMed2004

The use of artificial neural network analysis to improve the predictive accuracy of prostate biopsy in the Japanese population.

OBJECTIVE: We examined the efficacy of an artificial neural network analysis (ANNA) based on parameters available from previously existing examinations for improving the predictive accuracy of prostate cancer screening in the Japanese population. METHODS: Two hundred and twenty-eight patients with prostate-specific antigen (PSA) of 2-10 ng/ml were enrolled in this study. Two artificial neural network analysis (ANNA) models were constructed: ANNA1 with patient age, total PSA, free to total PSA ratio, prostate volume, transition zone volume (TZ), PSA density (PSAD) and PSA-TZ density (PSATZ) as input variables, and ANNA2 with presumed circle area ratio (PCAR), digital rectal examination (DRE) findings and chief complaint added as variables. The predictive accuracies of the ANNA models were compared with conventional PSA and volume-related parameters and a logistic regression (LR) model by receiver operating characteristic (ROC) curve analysis. RESULTS: Of 228 patients, 58 (25.5%) were diagnosed with prostate cancer. While ANNA2 had a slightly larger area under the curve (AUC) than ANNA1 (0.782 versus 0.793, P = 0.8477), the AUC of ANNA2 was significantly greater than those of ln(PSA), PSAD, PSATZ and free to total PSA ratio (P = 0.0004, 0.0230, 0.0304, and 0.0037, respectively). The accuracy of ANNA2 was significantly better than that of LR analysis at 90 and 95% sensitivity levels (P = 0.0051 and P < 0.0001, respectively). At 95% sensitivity level, ANNA2 reduced unnecessary biopsies by 40.0% with a negative predictive value of 95.7%. CONCLUSIONS: To determine the indication of prostate biopsy for PSA value in the range of 2-10 ng/ml, the ANNA model has the possibility to reduce unnecessary biopsies without missing many cases of cancers.

Aged↗