14 results
Disorders of Pigmentations - Hypopigmentation and Hyperpigmentation - Differential Diagnosis Algorithm

HYPOPIGMENTATION
Diffuse Congenital - Generalized hypopigmentation of
Disorders of Pigmentations ... Diagnosis Algorithm ... sclerosis (white "ash ... versicolor (more commonly ... #causes
Skin Hypopigmentation - Differential Diagnosis Algorithm

Diffuse Congenital - Generalized hypopigmentation of hair, eyes, skin
 • Phenylketonuria
- Differential ... sclerosis (white "ash ... Localized Acquired • Tinea ... Hypopigmentation #disorders ... #causes
Christmas Tree Rash of Pityriasis rosea
 - small oval scaling patches
 - Christmas tree pattern
 -
parallel to lines of skin ... palms/soles - Differential ... diagnosis: secondary ... nummular eczema, tinea ... #dermatology #photo
Causes of Petechial Rash - Differential Diagnosis Algorithm

Pinpoint areas (less than 2 mm) of hemorrhage, which
Causes of Petechial ... Rash - Differential ... Vasculitis - Collagen disorders ... RMSF - Henoch Schonlein ... cryoglobulins • Skin
Dermatologic Manifestations of Granulomatosis with Polyangiitis (GPA)

Skin involvement in granulomatosis with polyangiitis (GPA) is common and
disease or more commonly ... GPA causes disease ... Rarely dominate the clinical ... reticularis Differential ... EGPA • Henoch-Schönlein
Moccasin-variety Tinea Pedis 
70 M chronic scaly feet. Over the years: rash has itched only occasionally;
Over the years: rash ... Diagnosis? ... dermatophytes cause ... rubrum is most commonly ... skin of inflamed
Lymphocutaneous Sporotrichiosis Infection

Landscaper w/ painless nodular rash of arm present for months wax and wane; diagnosis?
Lymphocutaneous
painless nodular rash ... wax and wane; diagnosis ... trauma leads to skin ... biopsy preferred Differential ... #photo #hand
Skin Hyperpigmentation - Differential Diagnosis Algorithm
Diffuse:
 • Tanning
 • Adverse cutaneous drug eruption
 • Addison's disease
- Differential ... • Melasma • Tinea ... versicolor (more commonly ... Hyperpigmentation #disorders ... #causes
Secondary Syphilis Rash
Secondary syphilis is the most contagious of all the stages of this disease, and
Skin rash and malaise ... commonly characterize ... resembling rashes caused ... #Diagnosis #Clinical ... #Photo #Dermatology
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
present • Henoch Schonlein ... tract, and often causes ... Drug Associated (Commonly ... Associated: (± 100 % Commonly ... mucositis - Rash