Histologic Diagnosis of Inflammatory Skin Diseases

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…unded by a prominent halo formed of a gelatinous capsule = Cryptococcosis The absence of an infiltrate of inflammatory cells is typical of a lesion of cryptococcosis in a patient immunosuppressed severely. The pseudocarcinomatous proliferation of…

Dermatology Practical & Conceptual

Multiple confluent reddish nodules

The patient A 48-year-old fisherman from Amazonas (north of Brazil) developed a small papule on the anterior left leg after a traumatic injury with a piece of wood 20 years ago. Over the course of years, multiple large, confluent, reddish to brownis…

Histologic Diagnosis of Inflammatory Skin Diseases

Deep fungal infections

Deep fungal infections Synonyms Mycetoma Subcutaneous mycoses Dermal mycoses Presentation stereotypical Age and sex Any age, both sexes Distribution of lesions Localized or widespread; some infections favor exposed sites; internal organs sometimes…

Histologic Diagnosis of Inflammatory Skin Diseases

Atypical mycobacterial infections

Atypical mycobacterial infections Presentation stereotypical Age and sex Any age, but more often in young adults, particularly men and those who are immunocompromised Distribution of lesions Localized to a circumscribed site, that being the one of i…

Histologic Diagnosis of Inflammatory Skin Diseases

Pneumocystis carinii infection

Pneumocystis carinii infection Synonym Pneumocystosis Presentation stereotypical Age and sex Individuals, usually young men infected by HIV Distribution of lesions External auditory canal, trunk, and extremities Arrangement of lesions Scattered and…