21 results
Dermatological semiology of Cutaneous Vasculitis 

Clinicopathologic correlations
 • Purpura, papules, pustules, necrosis: involvement of small vessels
Identification of causes ... vasculitis (3%) • Infections ... Vasculitis #dermpath #dermatology ... semiology #signs #lesions ... manifestations #pathology #lesions
Dermatologic Manifestations of Granulomatosis with Polyangiitis (GPA)

Skin involvement in granulomatosis with polyangiitis (GPA) is common and
Dermatologic Manifestations ... GPA causes disease ... cell arteritis Infections ... diseases • Fungal infections ... vasculitis #Dermatologic
Kerion
Raised, boggy lesion with heaped up purulent nodules 
Caused by host's response to a fungal ringworm
Raised, boggy lesion ... purulent nodules Caused ... fungal ringworm infection ... Griseofulvin #Kerion #Dermatology
Pustular Skin Rash - Differential Diagnosis Algorithm
Pruritic / Scaly / Erythematous lesions, usually poorly demarcated
Acneiform -
/ Erythematous lesions ... borders of lips Infectious ... thick honey-yellow crusts ... Pustular #SkinRash #dermatology ... Diagnosis #Algorithm #causes
Genital Lesions - Differential Diagnosis Algorithm
Elevated - Vesicles:
 • Herpes simplex
Elevated - Papules / Plaques -
Genital Lesions ... Papules / Plaques - Infectious ... Plaques - Non-infectious ... #skinlesions #dermatology ... Diagnosis #Algorithm #causes
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
hemorrhagic skin lesions ... SLE) - Viral infections ... APLS • Acute Infectious ... Differential #Diagnosis #hematology ... #nonpalpable #dermatology
Causes of Petechial Rash - Differential Diagnosis Algorithm

Pinpoint areas (less than 2 mm) of hemorrhage, which
Causes of Petechial ... reddish-purple lesions ... - Trauma - Infection ... Hypotension • Mucosal lesions ... #dermatology #physicalexam
Erythemas Summarized
Erythema ab igne
 • A dermatosis that results from repeated exposure to heat (fires, heating
potential inciting causes ... Haverhill fever caused ... classic targetoid lesions ... • Cause is unknown ... differential #diagnosis #dermatology
Erythema Annulare Centrifugum (EAC),
This is erythema annulare centrifugum (EAC), one of the “figurate erythemas.” These lesions
These lesions show ... Most cases are idiopathic ... associations with infections ... clinical #photo #dermatology
Sweet Syndrome

Acute febrile neutrophilic dermatosis (Sweets Syndrome) is a skin condition characterized by fever and inflamed
skin and mucosal lesions ... Causes: - Idiopathic ... Upper respiratory infection ... gastrointestinal infection ... Syndrome #diagnosis #dermatology