What is in the Differential Diagnosis for Brown and Grey Skin Conditions?

Discussion This is the fourth in a short case series of differential diagnoses of colored skin conditions. An introduction to dermatological terminologies and information about colors can be found here. A differential diagnosis by distribution and common pattern can be found here. For red, orange and yellow conditions, a review can be found here. For green, blue and purple conditions, a review can be found here. For black and white conditions, a review can be found here. Note that any color can be a normal variant for an individual or is physiologic for a given state. Acanthosis nigricans causes dark brown-black patches or streaks in skin creases especially on the neck, armpits and groin. It has a velvety elevated texture. It is caused by insulin resistance. Learning Point Brown is produced in several ways. Combinations of red, yellow and black, or orange and black are the usual ways. The differential diagnosis for brown skin conditions includes: Skin Acanthosis nigricans Addison disease Cushing syndrome Drug induced hyperpigmentation Topical or systemic medications often with additional skin exposure Incontinentia pigmenti Neoplasms Langerhans cell histiocytosis Lymphoma Melanoma Pigmented purpuric dermatosis Petechiae Purpura Telangiectasis Post-inflammatory hyperpigmentation Cosmetics Inflammation Sun Trauma Pregnancy Melasma Riehl melanosis Seborrheic keratosis Stasis dermatitis Nails Chemical-induced Incontinentia pigmenti Melanonychia Trauma Mucosa I...
Source: PediatricEducation.org - Category: Pediatrics Authors: Tags: Uncategorized Source Type: news