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Biomedical subjects

S Asari

Publications and source records attributed to S Asari.

At least 109 records · Page 6Linked to original sources
PubMed1989

Peripheral K cells in normal human pregnancy: decrease during pregnancy and increase after delivery.

Peripheral blood levels of K cells were measured in normal pregnant and post-partum women by a plaque-forming cell technique that detects K cells on the basis of their activity of antibody-dependent cell-mediated cytotoxicity (ADCC). Peripheral K cells decreased throughout normal pregnancy (n = 46; 7.8 +/- 3.4%, P less than 0.01; 0.13 +/- 0.08 X 10(9)/l, P less than 0.001) and increased in the post-partum period (n = 17; 14.2 +/- 6.1%, P less than 0.05; 0.32 +/- 0.20 X 10(9)/l, P less than 0.01) in comparison with those in normal non-pregnant controls (n = 29; 10.5 +/- 4.2%; 0.20 +/- 0.09 X 10(9)/l). These findings suggest that a decrease of K cells during pregnancy may contribute in part to maternal acceptance of the fetal allograft and that the post-partum increase of K cells may represent a post-partum increase of cell-mediated cytotoxicity, which may contribute to natural defense against puerperal infection.

Adult↗
PubMed1989

Incidences of antibodies to Yersinia enterocolitica: high incidence of serotype O5 in autoimmune thyroid diseases in Japan.

Antibodies to Yersinia enterocolitica serotype O3, O5, O6 and O9 were measured by the micro-agglutination method in 445 healthy subjects and patients with Grave's disease (n = 70), Hashimoto's disease (n = 45) and thyroid tumor (n = 29). In contrast to previous reports, the incidence of antibodies to serotype O3 in each group of patients with thyroid diseases was not significantly different from that in healthy subjects. However, the incidence of antibodies to serotype O5 was significantly higher in patients with Graves' disease (81.4%, P less than 0.001) and Hashimoto's disease (91.1%, P less than 0.001) than in healthy subjects (258.9%). Significantly increased incidence of antibodies to serotypes O6 and O9 was observed only in patients with Hashimoto's disease (40.0% and 51.1% vs healthy subjects 24.7% and 29.9%, respectively). Patients with thyroid tumor showed no increase in any serotype of Yersinia enterocolitica. No correlations was found between the titers of anti-Yersinia antibodies and anti-thyroglobulin or anti-microsomal antibodies. These data indicate an association between thyroid autoimmunity and antibodies to Yersinia enterocolitica. These results are different from those in reports from other countries, suggesting that serotype specificity may be influenced by racial or genetic factors.

Antibodies, Bacterial↗
PubMed1988

[A rare case of cerebral aspergillus aneurysm at the site of temporary clip application].

Anterior communicating artery aneurysm was shown in a 48-year-old man who had suffered from subarachnoid hemorrhage (SAH) by cerebral angiography. Right pterional approach was performed on the 40th day after SAH. Premature ruptured occurred during aneurysmal manipulation and temporary clip (Scoville clip) was placed at the middle of the right A1 segment for fifteen minutes. the anterior communicating artery aneurysm was successfully clipped and postoperative course was uneventful. But, four days after the operation, the patient fell into coma following generalized tonic convulsion. Lumbar puncture showed fresh SAH. Consciousness recovered gradually to a lethargic state. A newly formed berry aneurysm was revealed on the righ A1 segment at the site of the temporary clip application by cerebral angiography performed on the seventh day after aneurysmal surgery. Second attack occurred on the 12th postoperative day and the patient died on the 16th day after the operation. Postmortem findings disclosed massive subarachnoid and intraventricular hemorrhage from the ruptured aneurysm at the right A1 segment. Microscopic examination of the aneurysm and the right A1 segment. microscopic examination of the aneurysm and the right A1 segment showed the extensive destruction of the artery and massive proliferation of aspergillus in the arterial wall which was prominent of its outer layer. The mechanism of the formation of the new aneurysm in this case was considered as follows: the arterial wall was primarily damaged by the temporary clip and was weakened rapidly by the invasion of aspergillus, probably producing thrombosis of the vast vasorum, hemorrhage, and necrosis in it.

Aneurysm, Infected↗
PubMed1988

[Unruptured cerebral aneurysms in two siblings screened by cerebral computed angiotomography].

The authors report two siblings, both of whom had unruptured cerebral aneurysms found by screening examination of noninvasive cerebral computed angiotomography. Other authors have reported unruptured cerebral aneurysms detected by conventional cerebral angiography in asymptomatic relatives of families in which two or more individuals had cerebral aneurysmal rupture. It is of interest that, in our cases, the unruptured cerebral aneurysms were detected by noninvasive cerebral computed angiography in two asymptomatic siblings in a family with no history of ruptured aneurysm. To the best of our knowledge, this is the first report of detection of unruptured familial aneurysm by cerebral computed angiotomography. Case 1 is a 67-year-old female who had been complaining of dullness in the head. Cerebral computed angiotomography showed a small high density nodule, suggesting an unruptured aneurysm of the right middle cerebral artery. An aneurysm with a diameter of 4 mm was found in the right middle cerebral artery. A 72-year-old male, who was a brother of case 1, had been afraid of having cerebrovascular disease, and wanted to have a neurological examination check-up. Computed angiotomography revealed a high-density nodule in the anterior communicating artery. Conventional cerebral angiogram showed a 6 X 7 mm aneurysm. However, both of the patients refused surgical treatment. Lozano et al reviewed the previously reported familial aneurysm cases. According to them, familial aneurysm tends to rupture at a younger age and at a smaller size than non-familial aneurysm. It is well known that asymptomatic members of familial aneurysm have a risk of developing aneurysm.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged↗
PubMed1988

[Chronic encapsulated intracerebral hematoma due to metastatic brain tumor: a case report].

Intracerebral hemorrhage from a brain tumor can mask the cause of bleeding, confuse the diagnosis, and affect the treatment and prognosis. This type of hemorrhage is generally regarded as a rapidly progressive, fulminating disease, sudden in onset, with the outcome being death or profound neurological deficits. Such hemorrhages are demonstrated by CT scan as intracerebral high density areas. Intracerebral hematomas producing chronic neurological disability and chronic intracerebral hematomas are rarely reported. We experienced a case of chronic intracerebral hematoma due to metastatic brain tumor. The patient was a 60-year-old female, and the initial symptoms were mild headache followed by right homonymous hemianopsia. The intracranial lesion was demonstrated by CT scan as an oval-shaped low density area (3 X 4.5 cm) with a ring enhancement in the left occipital lobe. MRI showed marked high intensity by short SE and long SE in the left occipital lobe. A left occipital craniotomy was performed. No tumor could be seen macroscopically except for an old encapsulated hematoma. Aspiration of the liquid hematoma and biopsy of the wall of the hematoma were done. A histological examination revealed an adenocarcinoma. Spontaneous bleeding from brain tumors was reviewed, and diagnostic problems were discussed.

Adenocarcinoma↗
PubMed1987

Histopathologic investigation of a case of meningioangiomatosis not associated with von Recklinghausen's disease.

A case of meningioangiomatosis not associated with von Recklinghausen's disease is reported. Microscopically, irregularly branched blood vessels extending into the gray matter from the meningeal surface are surrounded by a concentric arrangement of proliferating spindle-formed cells. Ultrastructurally these proliferating cells are composed of elongated heterochromatin-rich nuclei and slender cytoplasm-containing microfilaments, occasionally associated with desmosomal junctions and basal laminalike structures. Judging from these findings, together with a negative immune reaction for S-100 protein, the histogenesis of these proliferating cells is most probably meningothelial in origin.

Adult↗
PubMed1987

Agenesis of the left internal carotid artery, common carotid artery, and main trunk of the external carotid artery associated with multiple cerebral aneurysms.

A case of agenesis of the left internal carotid artery, common carotid artery, and the main trunk of the external carotid artery with multiple cerebral aneurysms is presented. This case was diagnosed by angiography and computed tomography scanning and confirmed by operation. Correlation between the anomaly of the circle of Willis based on the absence of the internal carotid artery and the development of cerebral aneurysm is discussed on the basis of the reported cases.

Aged↗
PubMed1987

Craniopharyngioma in the third ventricle: necropsy findings and histogenesis.

A case of craniopharyngioma confined within the third ventricle with necropsy is reported. A stalk-like structure in this tumour was present in the wall of the third ventricle at its base. It is suggested that this tumour might have arisen from the remnants of Rathke's pouch persisting in the tuber cinereum.

Cerebral Ventricle Neoplasms↗
PubMed1987

[A case of pituitary hyperplasia associated with primary hypothyroidism].

A thirteen-year-old girl was admitted complaining of short stature and anemia. The low titers of her serum T3 and T4 and the abnormally high TSH level represented primary hypothyroidism. Although she had normal sellar size, CT demonstrated an intra- and suprasellar round mass with homogeneous enhancement. With thyroid replacement therapy the enhanced mass diminished on CT within 5 months, and her symptoms regressed. Twelve cases with radiological diminution of pituitary mass or visual field improvement after thyroid replacement therapy are reviewed. They were considered to be pituitary hyperplasia, rather than pituitary adenoma, caused by long-standing untreated hypothyroidism. In four of them, the pituitary mass on CT was diminished after the therapy. Characteristic CT findings of pituitary hyperplasia, including our case, was a round isodensity mass with homogeneous enhancement in the midline of the pituitary region. In the experimental studies, pituitary hyperplasia is based on the feedback mechanism of hypothalamic-pituitary-thyroid axis, and ultimately autonomous pituitary adenoma may occur. Pituitary mass with hypothyroidism, visual field defect, amenorrhea or galactorrhea tend to be mistaken for prolactinoma or non-functioning adenoma with pituitary hypothyroidism. Thorough endocrinological examination must be carried out. The first choice of treatment for this type of pituitary mass should be thyroid replacement therapy. If there is no improvement of visual field, no regression of pituitary mass on CT, or continuing high TSH levels, then pituitary surgery must be considered.

Adolescent↗
PubMed1987

[Susceptibility of clinical isolates to aztreonam].

Aztreonam (AZT), which has a newly developed and synthetic structure belonging to the group of monobactams, possesses excellent antibacterial activity against a broad range of Gram-negative bacteria (including the beta-lactamase producing strains). Antibacterial activities of AZT were examined and compared with those of 5 antibiotics (cefoperazone (CPZ), latamoxef (LMOX), cefotaxime (CTX), cefmetazole (CMZ) and cefsulodin (CFS) against 296 strains of clinical isolates. The evaluation of antibacterial activities was determined with the inhibition zone diameter obtained by the single disc method. The results can be summarized by three categories as follows: 1. Susceptibility of clinical isolates to AZT and other antibiotics AZT and other 3rd-generation antibiotics (CPZ, LMOX, CTX) showed excellent antibacterial activities against most strains. Especially AZT was more active against Enterobacter cloacae and Serratia marcescens than reference drugs. Against Pseudomonas aeruginosa, the activity of AZT was similar to that of CFS. AZT showed as excellent activity against P. aeruginosa as CFS. 2. Susceptibility of strains isolated from different clinical materials and different clinics AZT showed the highest antibacterial activity against the clinical isolates from sputum, pharynx, urine, pus, bile, puncture fluid, blood and others. AZT exhibited the most potent activity against isolates in the 7 clinics we tested. 3. Susceptibility of strains isolated from inpatients and outpatients AZT demonstrated the highest antibacterial activity (the rate of susceptibility: 87.0%) against strains obtained from inpatients (except for P. aeruginosa). The activity of AZT (81.4%) against P. aeruginosa was as active as that of CFS (81.4%), and it was the highest in all drugs. Antibacterial activity of these antibiotics against bacteria was rated as follows: AZT greater than LMOX greater than CPZ greater than CTX greater than CMZ AZT showed the highest antibacterial activity (100%) against strains isolated in all the materials and at all the clinics tested of outpatients. Antibacterial activity of these antibiotics against isolates from outpatients was rated as follows: AZT greater than CPZ greater than LMOX greater than CTX greater than CMZ.

Aztreonam↗
PubMed1987

[Clinical study of late onset Chiari type I malformation].

Eight cases, 5 males and 3 females, of Chiari type 1 malformation aged from 9 to 51 years (mean 33.3 years) were analysed. The average age of the onset of symptoms was 29.6 years, between 7 and 44 years, and that from the onset of symptoms to the presentation to the hospital was 3.3 years ranged from 1 month to 16 years. Pain (87%) in the head or in the cervical region was the most common symptoms, the former was 5 cases and the latter was 2. The next common symptoms were unsteadiness and gait disturbance (50%). Weakness of one or more limbs was the complaints of 3 (38%) of the patients, and sensory impairment was 38%. Other symptoms included stiffness of the neck and shoulder, limitation of the neck movement, abnormal head posture, rectourinary incontinence and so on. In physical examination, foramen magnum compression signs (63%) and cerebellar signs (63% were most common and lower cranial nerve palsy (38%) and intracranial hypertension (25%) were included. Abnormalities of the skull and cervical spine were common on X-ray films. The were cervical fusion or occipitalization and basilar impression. On the angiograms, descended PICA was visualized in all cases. CT metrizamide myelography was performed in 2 cases and MRI was done in 1 case. They could clearly demonstrate the descended tonsils and were found to be the most reliable radiographic examination in the disease.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1987

[Application of the RI-counting method in CSF rhinorrhea].

Some diagnostic procedures for CSF rhinorrhea have been reported, but they can not always identify and localize CSF leakage. This method, using intranasal cotton pledgets after the intrathecal injection of radioisotope (111In-DTPA) is thought to be reliable, informative and innocuous for localizing the sites of CSF leakage. This technique was named RI-counting method, and applied in two cases that were difficult to diagnose especially with positional-loading. The patients were first in the supine position, then in the sitting position, after the intrathecal injection of radioisotope and the intranasal insertion of cotton pledgets. After exchanging these pledgets, the patients were set in the prone position. After measuring the radioactivity of these pledgets and of 1 ml of blood, the ratios of the radioactivity of the pledgets to that of the blood were calculated. In case 1 the ratios of the left sphenoethmoid recess and the left middle meatus were significantly higher when the patient took the prone position, but in the supine or sitting position the ratios were in the normal range. In case 2 the ratio of right olfactory cleft was significantly higher in the sitting position or neck flexion. Both cases were operated and demonstrated that the location of the CSF leakage was presumable by using RI-counting method, regarding the anatomical relationship between the intranasal sites of pledgets and the opening of the paranasal sinuses. Positional-loading seemed to be essential. We obtained 72 pledgets of patients without CSF rhinorrhea, and the ratios of radioactivity of these pledgets had a mean value (M) of 0.156 and a standard deviation (SD) of 0.107.(ABSTRACT TRUNCATED AT 250 WORDS)

Cerebrospinal Fluid Rhinorrhea↗
PubMed1986

Screening and treatment of unruptured cerebral aneurysms.

Thirty outpatients with unruptured cerebral aneurysms screened by computed angiotomography have been analysed and followed up in our clinic since 1979. Seventeen were men and the age range was 41 to 74 years old (mean 57.7 years). Patients had no or only mild neurological symptoms, such as headache, sensorimotor or speech impairment and others, which were scarcely related to the unruptured aneurysms themselves. It is important to realize that these first aneurysms which remain unruptured, have a primary significance to the individual in the protective aspect of an initial subarachnoid haemorrhage. Operation was successfully performed in fifteen patients. Transient aggravation of previous diseases, e.g. cerebral infarction, occurred in three after operation. Follow-up studies of fifteen patients without operation revealed no change in eight and some worsening or death due to other or previous diseases in six. One died of aneurysmal rupture in the 5th month after its detection. Because of the low operative risk, we advocate the operative treatment of unruptured aneurysms, following careful selection of the indicated patients.

Adult↗