What is in the Differential Diagnosis for Black and White Skin Conditions?
Discussion
This is the third in a short case series of differential diagnoses of colored skin conditions.
An introduction to dermatological terminologies and information about colors can be 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 brown and grey 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. When lesions of the opposite color of the normal skin tone occur, this can be worrisome for individuals.
From a physics standpoint, black and white are not colors. Black and white do not have specific visual spectral wavelengths. Instead, black absorbs all the waves in the visible spectrum (none are reflected back to see the color), and white reflects back all the wavelengths. From an artistic or daily living viewpoint, black and white are described/treated as colors.
Learning Point
Black is not in the visible spectrum of light.
The differential diagnosis for black skin conditions includes:
Skin
Acne – blackhead or open comedome
Acanthosis nigricans
Blue nevus
Calciphylaxis
Dermatosis papulose nigra
Discoid lupus erythematosus
Ecthyma gangrenosum
Exogenous ochronosis
Foreign body
Hematoma
Ink spot lentigo
Infection
Mucormycosis
Tinea nigra
Verrucae plantaris
Neoplasms
Basil cell carcinoma
Melano...
Source: PediatricEducation.org - Category: Pediatrics Authors: Pediatric Education Tags: Uncategorized Source Type: news
More News: Acanthosis Nigricans | Acne | Cancer & Oncology | Carcinoma | Chemistry | Children | Databases & Libraries | Dermatitis | Dermatology | Eczema | Education | Gangrene | Hives | Hypopigmentation | Learning | Lichen Sclerosus | Lupus | Melanoma | Pediatrics | Physics | Piedra | Pityriasis | Psoriasis | Skin | Skin Cancer | Universities & Medical Training | Vasculitis | Vitiligo | Wikis