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Biomedical subjects

M S Chou

Publications and source records attributed to M S Chou.

23 records · Page 2Linked to original sources
PubMed1993

Ventricular tumors--CT evaluations of 28 cases.

Ventricular neoplasms can be grouped together as a single disease entity because of the behavior of some of the tumors and similarities between the access of therapy and procedure of operation. In our series, the incidence of various ventricular neoplasms (shown in decreasing order) were metastasis, astrocytoma, ependymoma, meningioma, choroid plexus papillomas and oligodendroglioma. The intraventricular tumors included some metastasis involved by hematogenous spread, meningioms, and choroid plexus papilloma while paraventricular tumors included some of the systemic myeloproliferative disorders with ventricular seeding along with tumors with glial origins. Most of the patients with symptoms of intraventricular tumors also had symptoms related to increased intracranial pressure while those with paraventricular neoplasm presented symptoms related to focal signs or symptoms. CT scan with enhancement could provide a very good image modality except in some involvements in the posterior cranial fossa.

Adolescent↗
PubMed1991

[Moyamoya disease-analysis of 9 cases and review of the literature in Taiwan].

Moyamoya disease is a rare disorder in Taiwan. From 1984 to 1990, we documented 9 cases of Moyamoya disease, 5 from Kaohsiung Medical College Hospital, and 4 from Mackay Memorial Hospital. The average age was 34.2 years old, which is higher than compared with that mentioned in the foreign literature. In this series there were 3 cases with hemorrhages and 6 cases with infarctions. As revealed by CY scans, two of the infarction cases had low density zones involving splenium of the corpus callosum, which is an unusual location for cerebral infarction. Two of the hemorrhagic cases involved the ventricles, and another case, with putamen hemorrhage, ruptured into the adjacent sylvian fissure and the basal cisterns. The clinical data and radiological manifestations were analysed in detail.

Adolescent↗
PubMed1991

[High-resolution computed tomography evaluation of congenital anomalies of the temporal bone].

High-resolution computed tomography (HRCT) was used to study 23 patients with congenital temporal bone deformities. One patient had an inner ear abnormality and 3 patients were combined together with inner, middle and external ear malformations. Embryological development of the outer and middle ears is linked. Development of the inner ear occurs independently. These abnormalities included vestibule dilatation in 2 patients, a lateral semicircular canal defect in 1 case, dilatation of lateral and superior semicircular canals in 1 patient, only dilatation of the lateral semicircular canal in 1 case, oval-window non-development in 3 cases, oval aqueduct dilatation in 1 patient and inner ear abnormalities in 1 case. The study also included 17 cases of unilateral external auditory canal atresia, 5 cases of bilateral atresia, and 1 normal external auditory canal. There were 8 cases of unilateral and 2 cases of bilateral bony atresia. There were 9 unilateral and 1 bilateral cases of membranous atresia. Two cases had bony atresia on one side, with contralateral membranous atresia on the other. Nine unilateral and 2 bilateral cases were positioned superiorly and posteriorly of the mandibular condyle. Thick atresic plate were found in 10 unilateral and 2 bilateral cases. Small tympanic cavities were found in 12 unilateral and 2 bilateral patients; 7 unilateral and 2 bilateral cases had acellular and hypoplastic mastoids. Ossicular deformities were seen in 14 unilateral and 2 bilateral patients. One patient had no ossicle. Anteriorly located descending facial nerve canal was noted in 9 unilateral and 2 bilateral cases. Congenital cholesteatoma was identified in 2 patients.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1989

[The effects of metrizamide myelography on electroencephalographic changes].

Metrizamide, a non-ionic water soluble contrast medium, is used in myelography for detecting spinal cord lesions. Because it is an injection in the subarachnoid space, the effects on the central nervous system following metrizamide myelography should be studied. Electroencephalography can offer a non-invasive and objective method for evaluating the functions of the central nervous system. From September to December 1986, 30 cases which had received cervical or lumbar metrizamide myelography were collected. After myelography, in addition to a history review and neurologic examination, electro-encephalography was carried out within 24 hours. If the EEG record revealed abnormal, a series of EEG follow-ups were conducted until recordings were normal. The incidence of clinical adverse effects following Metrizamide myelography was 53.3% and 66.6% respectively in cervical and lumbar injections. No significant difference was found between the two groups. Secondly, the abnormal rate of the EEG record was 40.0% and 60.0% following cervical and lumbar myelography. The difference was also not significant. Lastly, the relation between clinical adverse effects and an abnormal EEG records was poor in cervical metrizamide myelography but good in lumbar myelography. The conclusions suggested by this research that the clinical adverse effects and the abnormal EEG record after metrizamide myelography are transient and are reversible changes. The mechanism of complications following cervical and lumbar metrizamide are different. Although complications may occur following cervical and lumbar metrizamide myelography, it remains a practical method in detecting spinal cord lesions.

Adult↗