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Biomedical subjects

A Sakaguchi

Publications and source records attributed to A Sakaguchi.

At least 55 records · Page 3Linked to original sources
PubMed1982

Dense cerebellopontine epidermoid cyst.

A diffuse, bubblelike, high-density epidermoid cyst of the cerebellopontine angle is described as seen on CT scanning. The high density was attributed to high protein concentration of the cystic fluid due to a proliferative and exudative defense reaction to a "minor leak" of the lipidic material through the capsule, verified by Sudan black B stain. A description of the appearance of the tumor on computerized tomography, based on 42 cases of intracranial epidermoids reported in the literature, is discussed. To our knowledge this is the first morphological documentation of spontaneous leakage of cyst contents, and the second report in the English literature of a dense intracranial epidermoid.

Adult↗
PubMed1981

Home blood pressure and circadian variation of blood pressure in the evaluation of hypertensive patients.

Clinical blood pressures measured at clinic by physician were higher than home blood pressures measured at home by patients in the majority of untreated patients with essential hypertension, but equivalent or lower in some patients. Clinic minus home blood pressure (delta P) were correlated with the levels of clinic blood pressure (r = 0.51, p less than 0.005 for systolic; r = 0.35, p less than 0.02 for diastolic blood pressure, respectively). The systolic delta P might be greater in the middle-aged women, especially in the fifties of females than the age-matched males (p less than 0.05). The delta P could not be altered by any antihypertensive drugs with the exception of systolic delta P with diuretic alone. The blood pressure tended to remain more stable throughout the 24-hour period in proportion as the severity of hypertension increased. The observation of circadian variation in blood pressure disclosed that the blood pressure was lower in the morning, but increased gradually, resulting in the relatively high blood pressure between the afternoon and evening in the low renin and volume expanded type of hypertension. On the contrary, the blood pressure was already high in the early morning in hypertensive patients characterized by the accelerated renin-angiotensin system and contracted volume factor.

Adrenal Gland Neoplasms↗
PubMed1979

The role of macrophages in the early resistance to mouse hepatitus virus infection in nude mice.

Nude mice which had received intraperitoneal injection of silica simultaneously with infection of mouse hepatitis virus, NuU strain, died of severe necrotic hepatitis within 2 weeks postinfection, whereas those having received no silica survived for 3 weeks or more after challenge. Silica given day 4 postinoculation had no effect. The virus titers of the liver and spleen at day 4 as well as serum interferon levels at day 2 were much higher in silica-treated mice than those without silica treatment. At day 2 or 3 postinoculation, silica-treated mice were found to have a considerable number of necrotic foci in the liver with some neutrophil and lymphocyte infiltration, and viral antigen was present in the cytoplasm of some hepatocytes around necrotic foci. In contrast, those without silica treatment showed only some necrotic foci with some lymphocyte infiltration. Viral antigen was detected only in a few littoral cells but not in hepatocytes. The role of macrophages in the resistance at early stage of inection in nude mice is discussed.

Animals↗
PubMed1977

[Glossopharyngeal neuralgia associated with the right-bundle branch block and hypotension on sectioning a rootlet of the vagus nerve--case report (author's transl)].

A 74-year-old female who complained of severe attacks of pain in the throat and neck on the left side was first admitted to our hospital in 1971. Carbamazepine was effective at this time, and so she could be discharged. She was readmitted to the hospital in 1974 because of severe stabbing paroxysms of pain in the left throat, radiating into the auricular region as frequent as more than ten times a day. Paroxysms could not be alleviated by large doses of Carbamazepine, and side effects of the drug ensued. The pain could be easily elicited by talking, laughing, swallowing, pulling the left ear and pushing the left tragus. Block of the left 9th nerve with xylocaine produced complete relief of pain for 30 minutes to 1 hour; Plain skull X-rays and veretebral angiograms were normal. The patient was operated under general anesthesia in the sitting position. With the left suboccipital craniectomy, the left 9th nerve was cut without any change on ECG. Pulse rate, and blood pressure. Upon touching vagus nerve, the ventricular extrasystole and hypotension occurred. After the blood pressure restored to normal level and the extrasystole disappeared with administration of atropine and carnigen, the uppermost rootlet of the vagus nerve was cut. The blood pressure dropped abruptly again followed by the right bundle-branch block on ECG for approximately 20 minutes. Postoperatively, she was lethargic and had disorientation, delusion and disorientation. We attributed these symptoms to the hypoxia in operative procedure. The symptoms completely disappeared on the fifth postoperative day. The patient has been perfectly free from pain at the 15 month's follow-up without neurological or mental deficit except diminished gag reflex on the left side. We reported this our experienced case and discussed about the mechanism of the hypotension on sectioning a rootlet of the vagus nerve with literatures.

Aged↗