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Biomedical subjects

S Shuangshoti

Publications and source records attributed to S Shuangshoti.

At least 145 records · Page 8Linked to original sources
PubMed1977

Neoplasm of mixed mesenchymal and neuroepithelial origin of the optic nerve.

A case is reported of a 19-year-old male having right proptosis for 4 years because of a mixed meningioma and astrocytoma of the ipsilateral optic nerve. The sheath of this nerve is analogous to the leptomeninges, and neuroglial cells constitute the stroma of the nerve. Both meningioma and astrocytoma therefore can arise primarily in the optic nerve, and they may be combined in the same mass, forming a neoplasm of mixed mesenchymal and neuroepithelial origin.

Adult↗
PubMed1977

Multiple neuroepithelial (colloid) cysts: association with other congenital anomalies.

A 4-year-old boy had three neuroepithelial cysts, one in the third ventricle and two in the supratentorial subarachnoid space, and also had stenosis of the cerebral aqueduct, obstructive internal hydrocephalus, frontoethmoidal meningoencephalocele, and right microphthalmia. The occurence of these combined lesions supports the congenitially derived nature of the cysts. The cysts originated from neuroepithelium including ectopic ependyma-lined structures. The exception may be those cysts arising in or near the floor of the third ventricle; these cysts could be derived from the cleft of Rathke's pouch, an endodermal derivative. Folding of the neuroepithelium in contact with mesenchyma or neuroglial tissue is proposed as the mode of formation of most "colloid" cysts. Review of the literature as well as our experience indicates that neuroepithelial cysts are widely distributed throughout the central nervous system.

Abnormalities, Multiple↗
PubMed1976

Primary intracranial rhabdomyosarcoma producing proptosis.

A case is reported of a primary rhabdomyosarcoma occurring in the right subfrontal region of a 16 year old girl. The patient suffered from dull frontal headache and proptosis for three months before hospitalization. The circumscribed and demarcated neoplasm involved the dura mater, and invaded the frontal sinus and roof of the orbit on the same side. The pathogenesis of the tumour is thought to be related to aberrant differentiation of unstable mesenchyme. A suggestion is made that the "medullomyoblastoma" should be classified as a type of neoplasm of mixed mesenchymal and neuroepithelial origin.

Adolescent↗
PubMed1976

Melanosis of the choroid plexua.

A unique case of melanosis of the choroid plexus in a 74-year-old man who died of hypertensive cardiovascular disease is described. The cerebral lesion did not cause symptoms. The proposed pathogenesis is the conversion of choroidal epithelial lipofuscin into melanin. Our findings also may explain the origin of a previously reported primary malignant melanoma of the choroid plexus and of black cortical adenomas of the adrenal gland.

Aged↗
PubMed1975

Neurilemmoma of the oculomotor nerve.

A case is presented of neurilemmoma of the left oculomotor nerve occurring in a 64-year-old hypertensive woman. The incipient tumour produced ptosis, limited inwards rotation of the eyeball, and persistent pupillary dilatation on the left side. The mechanism of this process is discussed, having regard to the interruption of the fibres innervating these structures by the tumour, and considering the mode of occurrence of the ocular and pupillary impairments. The patient also had generalized athero-sclerosis and fusiform aneurysm of the terminal part of the left internal carotid artery. The symptoms of headache, seizure, coma, and temporary right hemiparesis were considered as manifestations of hypertensive encephalopathy unrelated to the tumour.

Aneurysm↗