DERMATOLOGY NOTES FOR THE USMLE

DERMATOLOGY NOTES

FOR MEDICAL STUDENTS

By

J.R. Phillip MD, PhD

SMASHWORDS EDITION

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PUBLISHED BY:

J.R. Phillip MD, PhD on Smashwords

DERMATOLOGY NOTES

FOR MEDICAL STUDENTS

Copyright © 2012 by J.R. Phillip MD, PhD

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Acanthosis Nigricans

Velvety brown lesion usually located in axilla/neck

Assn: stomach adenocarcinoma, MEN II b, insulin resistance (DM, obesity)

Acne Rosacea

Looks like acne but begins in middle age

Assn: Rhinophyma (red bulbous nose, see image abov

Tx: topical Metronidazole, Tetracycline PO

Famous Sufferers: J.P. Morgan

(Self-conscious about his rosacea, J. P. Morgan hated being photographed)

Severe Cystic Acne

Tx: Isotretinoin PO (vitamin A analogue, teratogenic, pregnancy test before commencing treatment then monthly)

Acne Vulgaris

Tx: Tretinoin, Benzoyl Peroxide, topical antibiotic

Actinic Keratosis

Develops on sun-exposed areas

Precancerous lesion, can progress to squamous cell CA

Prophylaxis: sunscreen

Tx: topical 5-Fluorouracil (5-FU), Tretinoin (emollient cream), liquid N2

Alopecia Areata

Autoimmune

Tx: localized Steroid injection (hair loss can recur after successful treatment)

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