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Biomedical subjects

Y Oishi

Publications and source records attributed to Y Oishi.

At least 19 recordsLinked to original sources
PubMed1992

Surgical excision of hemophilic pseudotumor of the ilium.

The iliac hemophilic pseudotumor is a rare complication of hemophilia occurring in 1-2% of patients with Factor VIII or Factor IX deficiency. It is frequently disabling and life threatening. This report presents a comparative study of postoperative results of two cases of hemophilic pseudotumor of ilium. One patient undergoing partial resection showed a favorable postoperative course, whereas the patient with complete resection of the pseudotumor died of postoperative bleeding and sepsis. Studies on the postoperative results of these two cases indicate that careful preoperative consideration of tumor size and degree of infiltration is of the utmost importance in operative management. Early excision of tumors eliminates the possibility of endogenous infection. Even partial resection of huge tumors, leaving the lateral wall intact for compression, can promote recovery of functions.

Angiography↗
PubMed1992

[Countermeasures for urinary incontinence in patients with senile dementia: correlation between urinary incontinence severity, senile dementia severity, and activity of daily living].

The actual conditions of urinary incontinence in 101 patients with senile dementia (23 men and 78 women, average age 80 years) and their urinary control was studied. The three categories of 1) dementia severity, 2) activity of daily living and 3) degree of urinary incontinence, were each divided into five grades and the patients were evaluated accordingly. The correlation among the grades was studied. Of the 101 patients, 87 had urinary incontinence. These 87 were further subdivided into two groups: an ambulatory patient group (25) in which the patients could manage their own daily activity, and the bedridden group (62). The countermeasures for the first group of patients were, usage of a portable chamber pot for 6 patients and induced urination in 5. An anticholinergic agent was administered to 47 of the bedridden patients. The condition of urinary incontinence was reevaluated in both groups 4 weeks later. A high degree of correlation was observed among the grades of dementia severity, activity of daily living and urinary incontinence severity. After the countermeasures taken, improvement in urinary incontinence was observed in the 6 patients who used a portable chamber pot, and in the 5 patients who were subjected to induced urination. No improvement was seen in urinary incontinence in the bedridden patients who were treated with an anticholinergic agent. In conclusion, countermeasures for urinary incontinence in senile dementia should be indicated primarily for patients who can manage their own daily activity.

Activities of Daily Living↗
PubMed1991

Induction of tumors in the Japanese house musk shrew, Suncus murinus (Insectivora), by dimethylbenz[a]anthracene.

The carcinogenic effect of 7,12-dimethylbenz[a]anthracene (DMBA) was examined in the virgin female Japanese house musk shrew, Suncus murinus (family: Soricidae, order: Insectivora). Leukemia, musk gland tumors, pilosebaceous tumors and sarcomas were induced in the DMBA-treated shrews, whereas none of the controls developed any tumors up to 50 weeks of age. DMBA emulsion was administered i.p. at a dose of 1.25 or 2.5 mg once a week, with either four or eight doses being given from 8 weeks of age. Leukemia developed in 100% (9/9), 50% (5/10), 56% (5/9) and 0% (0/10) of the animals treated with a total dose of 20 mg (8 x 2.5 mg), 10 mg (8 x 1.25 mg), 10 mg (4 x 2.5 mg) and 5 mg (4 x 1.25 mg) of DMBA respectively. Leukemia was of the lymphatic and/or mast cell type, and the spleen was the organ invariably involved. A dose-dependent effect of DMBA was not observed for pilosebaceous and musk gland tumors. When 1 mg of DMBA powder was dusted into the subcutaneous tissue at 4 weeks of age, sarcomas developed at the dusted site (69%; 9/13).

9,10-Dimethyl-1,2-benzanthracene↗
PubMed1989

[Clinical evaluation of serum prostatic acid phosphatase assay based on the immunoenzymatic method (TZR-516)].

The usefulness of a newly developed prostatic acid phosphatase assay based on the immunoenzymatic method (PAP-IEA) was studied. Serum samples were obtained from 22 untreated prostatic carcinoma patients, 34 benign prostatic hyperplasia patients, 32 prostatic disease-free patients and 27 normal volunteers. Mean +/- S.D. of PAP-IEA in prostatic disease-free group and normal volunteer group was 0.46 +/- 0.27 ng/ml. So, the upper limit of PAP-IEA for clinical normal range was set to 1 ng/ml (= Mean + 2S.D.). Thus, the false positive rate of benign prostatic hyperplasia was estimated at 9% and false negative rate of untreated prostatic carcinoma at 27%. Meanwhile, PAP-IEA values measured in this study were correlated well to PAP-RIA values measured in the same samples (r = 0.994).

Acid Phosphatase↗
PubMed1988

Enhancement of cis-diamminedichloroplatinum and mitomycin C-induced sister chromatid exchanges by dibutyryl cyclic AMP in a human salivary gland adenocarcinoma cell line in culture.

A human salivary gland adenocarcinoma cell line was cultivated in the presence of dibutyryl cyclic AMP (dB-cAMP), cis-diammine dichloroplatinum (cisplatin) or mitomycin C (MMC) only, or of the combination of dB-cAMP and each of the antineoplastic drugs. Then the treated cells were examined for the induction of sister chromatid exchanges (SCEs), colony-forming efficiency (CFE) in semisolid agar medium and cell survival as measured by counting for viable cells. It has been found that the frequency of SCE induction is significantly increased by treatment of cells with cisplatin or MMC under the presence of dB-cAMP, when compared to that in the cells treated with cisplatin or MMC only. Moreover, marked reduction in CFE and cell survival was found to occur in the cells treated with the combination of dB-cAMP and cisplatin or MMC. These finding indicate that treatment of a human salivary gland adenocarcinoma cell line with dB-cAMP results in modification of SCE induction, CFE and cell survival in the cells exposed to cisplatin or MMC.

Adenocarcinoma↗
PubMed1988

A prospective, randomized controlled study on the treatment of stage C and stage D prostatic cancer with estracyt in combination with other chemotherapeutic agents.

The present study was designed to investigate the efficacy of various combinations of chemotherapeutic agents in the treatment of prostatic cancer in a group refractory to antiandrogenic therapy (Group 1) and in a previous untreated group (Group 2). Therapeutic combinations of Estracyt (E) + Peplomycin (P) + Doxorubicin (Do) and P + Do + 5 FU (F) in Group 1 and E + P, Honvan (Ds) + P and E in Group 2 were carried out. The main objectives of this study were estimations of the efficacy of E and P in relation to the refractory cases of Group 1 and the efficacy of the combination E + P, in Group 2. This is the first such prospective, randomized, controlled study to be carried out in Japan in relation to prostatic cancer. The results obtained in the present study indicated that chemotherapeutic regimens including E provide some enhanced efficacy, but that the efficacy with regard to refractory cases is poor (23.1-27.3%), as has been reported of studies conducted in the USA and Europe. With regard to previously untreated cases, the E + P regimen achieved a relatively higher response rate than the other treatments (72.7 vs 44.5 or 50.0%). In the comparison of survival times and survival curves, there were no statistically significant differences among the various treatment subgroups. A comparison of survival curves revealed the interesting finding that the PAP-related response showed a clear correlation to the survival curves of Group 2 patients.

Aged↗
PubMed1987

[99mTc-DMSA renal uptake in urological diseases measured from renal tomographic images using single photon emission computed tomography (SPECT)].

To determine renal function, 99mTc-DMSA renal uptake was measured from renal tomographic images obtained by single photon emission computed tomography (SPECT). A total of 77 tests was conducted on 73 patients with various diseases in the kidneys and urinary tract to determine renal uptake. The correlation coefficient(r) between total renal volume and total renal uptake was 0.3509 and that between renal volume and uptake of 143 kidneys was 0.5433. In 62 patients whose creatinine clearance could be measured, the correlation coefficient between creatinine clearance and total renal volume was 0.2352, and that between creatinine clearance and total renal uptake was 0.8854, that is, creatinine clearance correlated well with renal uptake. Renal volume and uptake determined in 10 normal male and 10 normal female adults were 220 ml and 26.8% for the right kidney and 239 ml and 27.6% for the left kidney for the males and 206 ml and 26.4% (right) and 237 ml and 27.9% (left) for the females. This method, which requires no blood or urine collection, is very useful as an individual kidney function test to evaluate individual kidney function and to understand kidney function before and after operation in patients with renal and urinary diseases.

Adolescent↗
PubMed1986

Immunological reaction to horseradish peroxidase of the palatine tonsil of the rabbit.

Detection of the immune response to external antigen of the palatine tonsil of the rabbit is an interesting problem. Employing horseradish peroxidase (HRP) as an external antigen, the reactions of a perfusion sensitized group and those of a group sensitized by intravenous injection were examined. The results were as follows: 1. Hypertrophy of the palatine tonsil was recognized only in the perfusion sensitized group. 2. The serum titer level of the antibody to HRP was recognized to be high in the intravenous injection sensitized group, which was confirmed by the production of antibody in the spleen. It was also confirmed in the repeated perfusion sensitized group at a low level. 3. Antigen invasion through the epithelium of the crypt was possible by repeated intravenous injection sensitization as for perfusion sensitization. Also, invading HRP was observed electron microscopically to be phagocytized by macrophages and dendritic reticular cells. 4. In the perfusion sensitized group, production of antibody was not found in the palatine tonsils but in the regional lymph nodes of the neck. 5. In the perfusion sensitized group, a large number of eosinophils were noted mainly on the basal side of the interfollicular zone. 6. In the intravenous injection sensitized group, anti-HRP was found in the palatine tonsils and also in the spleen. Participation of the tonsils has been revealed in general human immunity.

Animals↗