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Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.

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contentuptodate· Content· item f3_4_3136

©2013 UpToDate ® Print Email Bitot's spot caused by vitamin A deficiency Bitot's spot (areas of abnormal squamous cell proliferation and keratinization of the conjunctiva), caused by vitamin A deficiency. This picture was taken in Lebanon and used as a clinical standard for examiners in international nutrition surveys. Reproduced from: Interdepartmental Committee on Nutrition for National Defense (1963). Manual for Nutrition Surveys 2nd ed. Department of Health, Education and Welfare, Public Health Service, NIH, US Government Printing Office, Washington DC 1963.