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Biomedical subjects

S Otsuka

Publications and source records attributed to S Otsuka.

At least 55 records · Page 3Linked to original sources
PubMed1994

HTLV-I associated uveitis and hyperthyroidism.

The records of 76 consecutive patients with etiology-undefined uveitis examined during the 3-year period between 1990 and 1992 were reviewed and 6 patients were found who had concomitant hyperthyroidism. These 6 patients had presented with uveitis symptoms and signs when hyperthyroidism was relieved with thiamazole therapy. The uveal disease was characterized by acute, granulomatous or nongranulomatous anterior uveal involvement and granular or membranous vitreous opacities with or without retinal vascular change. These manifestations resolved in a few weeks in response to topical and/or systemic corticosteroids. Three patients had recurrence of uveitis after remission for months to years. All of the patients had serum antibodies to HTLV-I. The uveal disease resembled HTLV-I associated uveitis that may develop in patients with HTLV-I associated myelopathy or HTLV-I carriers; 2 cases had chronic myelopathy or arthropathy that was considered associated with the retrovirus. The present observations suggest that the association between uveitis and hyperthyroidism is not accidental but shares a common underlying etiologic factor, HTLV-I, although the pathomechanism remains to be defined.

Adult↗
PubMed1994

[Visual acuity and central retinal sensitivity following removal of epimacular membrane].

We evaluated visual acuity and central retinal sensitivity after removal of the epimacular membrane to explore whether and how the visual outcome differs between idiopathic disease (seven cases) and secondary disease following rhegmatogenous retinal detachment surgery (seven cases). A 12-month follow-up study revealed that both the idiopathic and the secondary group showed a marked improvement in visual acuity during the initial six months, followed by a slight decrease. As regards the central retinal sensitivity as assessed by an Octopus automated perimeter, the idiopathic group remained unchanged, but the secondary group showed a gradual improvement. In addition, postoperative visual acuity in the secondary group appeared to correlate with the preoperative central retinal sensitivity. Preoperative assessment of preoperative retinal sensitivity may provide a means of predicting postoperative visual outcome.

Contrast Sensitivity↗
PubMed1994

[Acute erythroblastic leukemia presenting as FAB M6 with surface marker positive for megakaryocytic and erythroid: report of a case].

A fifty five-year-old male presenting as FAB M6 had blasts that were positive both for erythroblastic and megakaryocytic surface makers, i.e., carbonic anhydrase I, CD36 and CD41. HLA-DR and cD71 were also positive. In a very small portion, CD33 and glycophorin A were also positive. By Giemsa staining, these blasts were relatively large and had basophilic cytoplasm. By electroscopic study, PPO was negative and showed ferritin particles, theta granules and iron containing mitochondria in cytoplasm. Chromosome analysis revealed major karyotypic abnormality (MAKA). After initial treatment with blood transfusion, prednisolone and exymetholone, CD41b increased in positive ratio. Trial of remission induction with BHAC-DMP failed and patient died in 5 months.

Antigens, CD↗
PubMed1993

[A case of macrocystic cervical neurinoma diagnosed by MRI with Gd-DTPA].

The authors report a rare case of a large cystic cervical neurinoma. A 45-year-old female was admitted to our clinic because of motor weakness of the right upper extremity, numbness of the right fingers and right posterior cervical pain. Metrizamide CT myelography demonstrated the outline of a low density mass. MRI showed a mass revealing low signal intensity on T1-weighted image, high signal intensity on T2-weighted image and marginal enhancement on contrast image with Gd-DTPA. The mass which was diagnosed as cystic tumor, was located in the intradural extramedullary space between C4 to C5 segments. After C4 through C5 laminectomy, the tumor was found to originate from the C5 anterior motor root. The tumor consisted mostly of a cystic part with a very thin solid compartment beneath the capsule. Postoperative course of the patient was uneventful. Although spinal neurinoma is one of the most common spinal tumors, an almost completely degenerated large cystic spinal neurinoma is extremely rare. MRI with Gd-DTPA was useful for the diagnosis of the cystic neurinoma by clearly enhancing the margin of the tumor.

Cysts↗
PubMed1993

[Clinical usefulness of 111In transferrin scintigraphy in colorectal cancer].

As assessment was made regarding the clinical value of 111In transferrin in scintigraphy on 28 lesions in 26 cases of colorectal cancer. The positive rate of colorectal cancer was high: 21 lesions out of the 28 (75%) were found to be positive. As for the location of cancer, there was a tendency for the positive rate to be high in the ascending and transverse colon. There was no obvious trend regarding Borrmann's classification, histological type, or macroscopic depth of invasion. There was a trend for cases in which the maximum diameter of the tumor was large and depth of invasion was in progress to be positive. Ten cases in which a specimen was resected were all shown to be positive by scintigraphy. Radioactivity in the tumorous regions was 4.41 +/- 2.96 times that of the non-tumorous regions. Moreover, tumorous tissue was strongly stained by the immuno-histological staining with anti-Tf.receptor antibody. From the above findings, it was considered that 111In transferrin is clinically useful in scintigraphy, since it is evident that it accumulates in the tissue of colorectal cancer.

Aged↗
PubMed1993

[A case of achalasia evaluated with esophageal scintigraphy in terms of efficacy with endoscopic pneumatic dilatation].

The therapeutic effects on pneumatic dilatation were evaluated quantitatively by radionuclide transit study using 99mTc-Sn colloid in an achalasia patient. After dilatation, transit time (T3/4) with distilled water has improved from 13.5 seconds to 5.5 seconds. Radionuclide transit study using 99mTc-Sn colloid was a preferable method to evaluate the efficacy of the treatment quantitatively in an achalasia.

Adult↗
PubMed1992

Only three mutations account for almost all defective alleles causing adenine phosphoribosyltransferase deficiency in Japanese patients.

We analyzed mutant alleles of adenine phosphoribosyltransferase (APRT) deficiency in Japanese patients. Among 141 defective APRT alleles from 72 different families, 96 (68%), 30 (21%), and 10 (7%) had an ATG to ACG missense mutation at codon 136 (APRT*J allele), TGG to TGA nonsense mutation at codon 98, and duplication of a 4-bp sequence in exon 3, respectively. The disease-causing mutations of only four (3%) of all the alleles among Japanese remain to be elucidated. Thus, a diagnosis can be made for most of the Japanese APRT-deficient patients by identifying only three disease-causing mutations. All of the different alleles with the same mutation had the same haplotype, except for APRT*J alleles, thereby suggesting that alleles with the same mutation in different families were derived from the same ancestral gene. Evidence for a crossover or gene conversion event within the APRT gene was observed in an APRT*J mutant allele. Distribution of mutant alleles encoding APRT deficiency among the Japanese was similar to that seen in cystic fibrosis genes among Caucasians and Tay-Sachs genes among the Ashkenazi Jews.

Adenine Phosphoribosyltransferase↗
PubMed1992

Painful tic convulsif caused by a brain tumor: case report and review of the literature.

Patient with painful tic convulsif caused by a brain tumor is presented. The patient was admitted with right trigeminal neuralgia and ipsilateral facial spasm, i.e., painful tic convulsif. Preoperative computed tomography scans showed no apparent abnormalities; however, surgery revealed that these symptoms were associated with a pearly tumor located in the cerebellopontine angle. Subtotal resection for the decompression of the right trigeminal and facial nerves was performed and resulted in complete relief of the symptoms. Histological examination demonstrated the tumor to be an epidermoid cyst.

Cerebellar Diseases↗
PubMed1992

[A clinical and ultrastructural study of Fechtner syndrome in two Japanese families].

This is a report of Fechtner syndrome in two Japanese families. Six members of family I and three members of family II were studied. All but one had macrothrombocytopenia and leukocyte inclusion bodies, four had deafness, four had persistent proteinuria and none had cataracts. Under a diagnosis of ITP, two of them had splenectomy which resulted in no response. History revealed, other family members with deafness and/or nephritis were confirmed in both families. Ultrastructural studies of leukocytes showed oval inclusion bodies with unclear borders containing many fine ribosome like granules and randomly scattered filaments. Ultrastructural studies of macrothrombocytes were unremarkable except for a well-developed open canalicular system. More than half of megakaryocytes had uneven basophilic speckles in the cytoplasm, which were positive for Unna-Pappenheim staining. Ultrastructurally, widening of demarcating systems and remaining ribosomes were noted in the cytoplasma of mature megakaryocytes.

Deafness↗
PubMed1992

[A case of gastric carcinoma with peritonitis carcinomatosa responding remarkably to etoposide, adriamycin and cisplatin (EAP) therapy].

The patient was a 62-year-old male who had Borrmann 4 type gastric cancer. He presented massive ascites due to peritonitis carcinomatosa and the cytology of ascites was class V. He was treated with 3 courses of EAP (etoposide, adriamycin, cisplatin) therapy. Computed tomography showed ascites nearly disappeared. Remarkable improvement was observed by barium meal study and endoscopic examination, and partial remission (PR) was achieved. As for toxicity bone marrow suppression, alopecia and elevation of BUN were observed.

Adenocarcinoma↗