Biomedical subjects
Publications and source records attributed to H Masuda.
The identification and diagnosis of thyroid metastases from renal cell carcinoma are rare in living patients in spite of more frequent incidence during autopsy. We reported two cases of thyroid metastases from renal cell carcinoma. In both cases, histological examination revealed metastasis from renal cell carcinoma and negative immunohistological stain for thyroglobulin ruled out primary thyroid carcinoma.
Clinical efficacy of sodium imipenem/cilastatin was studied on 45 patients with complicated urinary tract infections, on whom prior antimicrobial agents were ineffective. A 0.5g dose of IPM/CS was administered by drop infusion twice a day for 5 days. The clinical efficacy was evaluated according to the criteria of the Japanese UTI committee. Of a total of 65 strains, 29 strains of gram positive bacteria and 36 strains of gram negative bacteria, were detected as causative microbials. Bacteriologically, 23 strains of gram positive bacteria (79%) and 34 strains of gram negative bacteria (94%) were eradicated following the treatment. S. aureus, E. faecalis and Flavobacterium sp. were less sensitive to IPM/CS. Overall clinical effectiveness rate of IPM/CS in the present study was 87%. Adverse drug side effects were observed in six patients, namely they were eruption, headache and slight elevation of serum transaminase. These findings suggest that IPM/CS is an effective agent for the treatment of complicated UTI even when the prior medicine was ineffective.
A 56-year-old female case of papillary thyroid carcinoma is reported. Nuclear DNA analysis using flow cytometry and immuno-histological staining with thyroglobulin, CA19-9 and CA125 of the primary and metastatic foci from the autopsy specimens were performed. Correlation between ploidy patterns and immuno-histological staining was not found. Although two histogram patterns namely DNA diploid (DP) and aneuploid (AP) with DNA index of 1.3 were seen in primary, sternal and lung metastatic foci, only DP pattern was seen in the lymph node metastatic foci.
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A hundred and sixty cases of ovarian tumor were preoperatively examined by transvaginal (TV) and Transabdominal (TA) scanning and accuracy of the assessment for histologic type was compared. We also examined 56 cases of postoperative ovarian cancer by ultrasonography to detect recurrent lesions. Positive predictive values for serous cysts and endometrial cysts were higher with TV than TA. Sensitivity for cancer was also high, but false negative rate was lower with TV than TA. The results showed that scatter from small particles and small mural echo in the cystic mass are visualized more clearly with TV, so that TV is more useful for assessing histological type of ovarian tumors. Sensitivity and specificity of ultrasonographic examination for detecting intraperitoneal recurrent lesions were 88.2% and 97.4%, respectively. Those for extraperitoneal lesions were 86.7% and 97.6%. Ultrasonography is suggested to be useful for detecting recurrence ovarian cancer especially for experitoneal lesions, as laparoscopy is not effective for such lesions.
A 23-year-old man presented with high fever and left abdominal pain. Ultrasonography, CT scan and angiography visualized a left adrenal cyst. Cyst fluid obtained preoperatively by percutaneous needle puncture under ultrasonographic guidance was purulent, and had a higher level of aldosterone, and lower level of amylase than the plasma. These findings suggested that this cyst originated from the adrenal gland. Histopathological examination of the surgically removed specimen confirmed the adrenal pseudocyst.
We report contiguous gene deletions in the distal short arm of the X chromosome in two patients with ichthyosis, due to steroid sulfatase deficiency, and other complex phenotypes. One patient had chondrodysplasia punctata (CDP) and ichthyosis with a normal chromosome constitution. Another patient had a CDP-like phenotype, ichthyosis, and hypogonadism. His karyotype was 46, -X,Y, +der(X)t(X;Y)(p22;q11). DNA from the two patients was analyzed by Southern blotting using cloned fragments mapped in the Xp21-Xpter region to investigate gene deletions. DNA from the patient with CDP showed a gene deletion of the STS, DXS31, and DXS89 loci, and DNA from the patient with X-Y translocation lacked fragments of the STS, DXS31, DXS89, and DXS143 loci. These findings suggest that the common deleted region involving the STS locus might have caused the similar phenotypes in both patients.
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A novel antitumor compound, N-[4-(5-bromo-2-pyrimidinyloxy)-3-chlorophenyl]-N'-(2-nitrobenzoyl ) urea (HO-221) was evaluated for its antitumor activity in experimental tumor models. HO-221 preparation was given orally to tumor-bearing animals. The compound exhibited significant effects against various tumors such as P388 and L1210 leukemias; M5076 reticulum-cell sarcoma; colon 38 carcinoma; human xenografts MX-1, LX-1, GA-1, and Co-1; Lewis lung carcinoma; sarcoma 180; and Walker 256 carcinosarcoma and was especially effective against solid tumors. However, its effect on murine B16 melanoma was moderate. Intermittent administration of HO-221 produced better results. The effects of HO-221 on human tumor xenografts were compared with those of other antitumor agents. HO-221 showed activity against LX-1 lung and Co-1 gastrointestinal tumor and was also effective against advanced-stage L1210 leukemia and Lewis lung carcinoma. Furthermore, the effect of HO-221 on drug-resistant tumors was examined using murine leukemias L1210 and P388. It showed no cross-resistance with the known antitumor agents Adriamycin (ADM), daunomycin (DM), vincristine (VCR), mitomycin C (MMC), cisplatin (CDDP), 5-fluorouracil (5-FU), cytosine arabinoside (Ara-C), methotrexate (MTX), cyclophosphamide (CPA), or carboquone (CQ), and collateral sensitivity to HO-221 was found in MMC-, CDDP-, and CPA-resistant sublines. HO-221 exhibits significant reproducible, broad-spectrum antitumor activity against experimental tumors as well as human neoplasms.
The problems encountered in the diagnosis and treatment of primary hyperparathyroidism were studied in 69 cases. The accuracy of imaging for hyperplasia was less than that for adenoma or carcinoma and the major causes for multiple operations were a failure to locate the four glands and mediastinal adenoma. The intravenous administration of high doses of calcitonin could reduce the serum calcium level of patients in hypercalcemic crisis. Carcinoma required ipsilateral modified radical neck dissection because of lymph node metastases, and non-medullary thyroid carcinoma was often associated with primary hyperparathyroidism. We found removal of the parathyroid adenoma and biopsy or extirpation of only one macroscopically normal gland to be a fully satisfactory procedure after bilateral neck exploration and attempting to identify at least four glands.
We investigated whether age-dependent reactivation of a repressed X-linked gene occurs. Subjects were female mice, carrying the X-autosomal translocation, T(X;16)16H (Searle's translocation). The mice were also heterozygous, for the X-linked gene coding for phosphoglycerate kinase (T16H pgk-1b/+ pgk-1a and pgk-1a was selectively repressed in these mice (McMahon and Monk, 1983). An electrophoretic method was applied to determine the PGK-1 allozyme patterns in blood, bone marrow, brain, gastrointestinal tract, liver, heart, spleen, and uterus (including tumor tissues when found). Samples were collected from mice of three different ages: 2 months (n = 4), 11 to 12 months (n = 10), or 18 to 21 months (n = 15). The lowest detection limit of the relative cellular population expressing the PGK-1A allozyme was found to be 2%, which was sensitive enough to detect the reported reactivation ratio (more than 10% of cells in a lower power microscopic field). We could not detect PGK-1A activity in any organ, including tumors in any age group, leading to the conclusion that reactivation of the repressed pgk-1a gene did not occur during aging.
Acid and neutral invertases were found in the mesocarp of developing muskmelon (Cucumis melo L. cv Prince) fruit and the activities of these enzymes declined with maturation of the fruit, concomitantly with the accumulation of sucrose. Neutral invertase was only present in the soluble fraction and acid invertase was present in both the soluble and cell-wall fractions. The cell-wall fraction contained three types of acid invertase: a NaCl-released invertase; an EDTA-released invertase, and a tightly bound invertase that still remained on the cell wall after treatment with NaCl and EDTA. The soluble acid and neutral invertases could be separated from one another by chromatography on DEAE-cellulose and they exhibited clear differences in their properties, namely, in their pH optima, substrate specificity, K(m) values for sucrose, and inhibition by metal ions. The EDTA-released invertase and the soluble acid invertase were similar with regard to their chromatographic behavior on DEAE-cellulose, but the NaCl-released invertase was different because it was adsorbed to a column of CM-cellulose. The soluble acid invertase and two cell-wall bound invertases had very similar characteristics with regard to optimal pH and temperature, K(m) value for sucrose, and substrate specificity.
Kawasaki disease (KD, or acute febrile mucocutaneous lymph node syndrome (MCLS)) was first described as a clinical entity in 1967 by Dr. Tomisaku Kawasaki of the Japan Red Cross Medical Center. Originally, it was thought to have a favorable prognosis, but as epidemiological surveys, augmented by pathological studies, have shown, it has come to be recognized as an often fatal disorder. In this report, the clinical symptoms, historical background, present status of research and epidemiological problems of KD are first described, and then we present a pathological and morphological outline of KD, focusing on pathological changes in the blood vessels, and the relationships of these changes to 1) the morphogenesis of arteritis, 2) the mechanism of coronary artery aneurysm formation and its sequelae, and 3) juvenile arteriosclerosis.
Two cases of acute attack of pseudogout associated with primary hyperparathyroidism are reported. Case 1 suffered from acute pain and swelling of the right ankle and dorsal of the right foot. Case 2 suffered from unknown fever and pain of the bilateral jaw, shoulder, elbow, wrist and knee joints. Postoperative radiological studies revealed the association of chondrocalcinosis in both cases. Synovial fluid in case 2 was aspirated and analyzed for calcium pyrophosphate dihydrate crystal by microscopic examination.
The presence of thyroid hormone autoantibodies was investigated in a 48-year-old non-goitrous woman with high levels of serum total T3 and free T3. Her other thyroid function tests were normal. The presence of thyroid hormone autoantibodies were assessed in serum, acid-charcoal treated serum, IgG fractions and in a purified IgG fraction. the IgG fraction was separated from serum by a protein A-Sepharose CL-4B column chromatography and purified by gel filtration chromatography using Sephacryl S 200. Sera from normal individuals were used as controls. The results showed that the increased serum total and free T3 levels were caused by the presence of anti-T3 IgG autoantibodies. The results also indicate that protein A column chromatography is useful as a screening method for gross qualitative analyses of thyroid hormone autoantibodies.
Diurnal patterns of food and water intakes, fecal and urine outputs, and locomotive activity were observed on beagles for three days continuously. They were kept individually in cages at temperature 21-23 degrees C, humidity 40-70% with a light time 7:00-19:00. The results showed that food and water intakes, and locomotive activity have diurnal patterns. Fecal and urine outputs have not diurnal patterns, but times of fecal and urine outputs is similar in many animals. The results suggest that physical condition is shown by quantitative values of behaviors, and sensitivity of diagnosis is raised by recognition of their diurnal patterns.
A newly recognized chlamydial species, Chlamydia pneumoniae causes acute respiratory infections including pneumonia, bronchitis and pharyngitis. In this paper, eight cases of bronchitis and tonsillitis associated with C. pneumoniae are presented. Three cases came to the clinic because of persistent cough and productive sputum. C. pneumoniae was isolated from sputum of a patient and cultured in HeLa 229 cells. Other two patients were diagnosed serologically; Antibodies were measured by microimmunofluorescence using formalized elementary bodies of C. pneumoniae. A titer of 512 in the IgG class was detected. Four patients had sore throat. C. pneumoniae was isolated and cultured from tonsillar swabs in all of them. A patient with sore throat and cough diagnosed as pharyngolaryngitis was sero-positive. Antibodies to C. pneumoniae in IgG and IgM class were 128 and 32, respectively. All the patients were treated with macrolide antibiotics (erythromycin and rokitamycin), and clinical symptoms subsided. In five patients from whom the organism was isolated, the agents were eradicated by the treatment. However, clinical courses of those patients revealed that patient takes a long time to recover from the illness, if diagnosis and first choice of antimicrobial agent are not appropriate.
Among 287 patients underwent pulmonary resection between Mar 1978 and Dec 1989, 49 were proved pathologically to have their primary tumor of 3 cm or less in the greatest dimension. Twelve of these 49 classified to stage III A by the modiastinal lymph node metastasis or stage IV by the pulmonary metastasis. The histologic type of tumor was adenocarcinoma in 10 and squamous cell carcinoma in 2. Mode of surgical treatment consisted of pneumonectomy in 2, lobectomy in 8, segmentectomy or wedge resection in 2, and complete mediastinal lymph node dissection was performed in all but 2. Survival rate in 1, 3, 5 year was 100%, 38.1% and 38.1% in 9 with stage III A disease, and 100%, 100% and 50% in 3 with stage IV disease, respectively, and significant difference was noted in comparison with control group with larger tumor in each stage (p less than 0.05). From these results, we concluded that patients with small primary tumor could expect longer survival after surgical treatment, even if mediastinal lymph node metastasis or pulmonary metastasis was present.