Vitamin A (Retinol) Deficiency and Excess
View this Vitamin A (Retinol) Deficiency and Excess mnemonic and other USMLE mnemonics in the Vitamins playlist.

Vitamin A (Retinol) Deficiency and Excess

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Vitamin A (Retinol) imbalances include syndromes of deficiency and excess.

Vitamin A Deficiency has a number of characteristic clinical findings, including night blindness (nyctalopia), bitot spots, dry scaly skin (xerosis cutis), and keratomalacia (corneal liquefaction).

Vitamin A Excess is more common than deficiency, and chronic hypervitaminosis A is characterized by dry skin, joint pain, pseudotumor cerebri, and hepatomegaly. Acute vitamin A toxicity presents with nausea/vomiting and vertigo. Crucially, vitamin A is teratogenogenic, and prescription of retinol-containing drugs should be carefully considered in sexually-active and pregnant women.

Find Vitamin A Biochemistry and other Vitamins among Pixorize's visual mnemonics for the USMLE Step 1 and NBME shelf exams.