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Biomedical subjects

V Menon

Publications and source records attributed to V Menon.

8 recordsLinked to original sources
PubMed1992

An aetiological profile of optic atrophy.

484 cases of optic atrophy were studied for the distribution pattern and significance of various etiological factors in different age groups of both sexes. Bilateral optic atrophy was found to be two and a half times as common as unilateral optic atrophy. Intracranial neoplasm (29.5%) was the most frequent known cause of bilateral optic atrophy in either sex and the most common tumor was chromophobe adenoma (48% of intracranial tumors) with highest incidence over 20 years of age. Craniopharyngioma was the most frequent tumor responsible for bilateral optic atrophy before 20 years of age. Intracranial glioma also emerged as an important cause of bilateral optic atrophy. Head injury due to road accidents and periocular trauma were the most common causes of unilateral optic atrophy in males, whereas no definite factor could be elucidated in unilateral optic atrophy in females. Vascular factors were the usual cause of optic atrophy after 40 years of age, highlighting the significance of thorough systemic evaluation.

Adolescent↗
PubMed1991

Skin test reactivity to whole body and fecal extracts of American (Periplaneta americana) and German (Blatella germanica) cockroaches in atopic asthmatics.

Forty-six atopic asthmatic subjects aged 3 to 58 years attending the allergy clinic of a university hospital were evaluated for prick skin test reactivity with commercially available extracts of cockroach (CCE) and house dust (HD). Additionally, skin testing was performed with American cockroach whole body (AWBE) and fecal extracts (AFE) as well as German cockroach whole body (GWBE) and fecal extracts (GFE) prepared in our laboratory. Commercial cockroach extract was prepared from American, German, and Oriental cockroach whole bodies. Skin test reactivity to the different extracts were as follows: 83% to HD, 70% to CCE, 70% to AWBE and/or GWBE, 63% to AWBE, 57% to GWBE, 63% to AFE and/or GFE, 52% to AFE, 50% to GFE, 48% to both AWBE and GWBE, and 39% to both AFE and GFE. The subjects with positive skin tests to AWBE and/or GWBE (70%) were the same individuals who showed skin test reactivity to CCE (70%). Subjects from lower income families (less than $10,000) had a significantly higher skin test reactivity to cockroach allergens than those from families with an annual income of $11,000 to $24,000 (P = .04). These results demonstrate the significance of cockroach sensitization in atopic asthmatics, suggest the importance of fecal cockroach allergens, and support earlier observations of shared interspecies allergens between American and German cockroach whole bodies.

Adolescent↗
PubMedDate not supplied

Cyclic vertical squint.

A rare case of cyclic vertical squint which developed after surgery on medial rectus muscle and its subsequent management by the Faden operation is described.

Adult↗
PubMedDate not supplied

Congenital nystagmus with head posture (a modified approach in surgical management).

The surgical methods for correction of an abnormal head posture in congenital nystagmus presently in use, do not correct the head posture adequately and in some cases produce a postoperative tropia. We felt that this may be related to the arbitrary quantities of surgery suggested by various workers. We have observed that surgery on the medial rectus is approximately one and a half times as effective as on the lateral. Using this ratio, excellent results have been obtained in 5 cases which are reported herein.

Adolescent↗