A Clinical Atlas of 101 Common Skin Diseases

Deep Fungal Infections

Cutaneous and subcutaneous lesions, usually nodules, that have become keratotic, crusted, and ulcerated as a consequence of infection by a variety of deep fungi, i.e., fungi situated in the dermis and subcutis, some of which may be disseminated to o…

Dermatology Practical & Conceptual

Multiple confluent reddish nodules

…s. Grocott’s stain, 1000x. [Copyright: ©2013 Jeunon et al.] In sporotrichosis, the fungus is not found in tissue in approximately 65% of cases [14]. Actually, in endemic areas of sporotrichosis, the diagnosis is highly suspected when the architectura…

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

Images

Images 10.17.1A: Nodular dermatitis, granulomatous + 10.17.1B: Collections of histiocytes enveloped by lymphocytes and plasma cells, and brown spores in a multinucleate macrophage = Chromomycosis In a fully developed lesion of chromomyco…

Dermatology Practical & Conceptual

A verrucous plaque on the lower leg

Quiz case A 52-year-old male patient from South Africa presented with a lesion on his lower left leg extending from the ankle to just below the knee that has been present for twenty years. The lesion first developed as a verrucous nodule close to th…

Histologic Diagnosis of Inflammatory Skin Diseases

Leishmaniasis

Leishmaniasis Synonyms Leishmaniosis Presentation stereotypical Age and sex Young adults of both sexes Distribution of lesions Localized in Oriental sore, widespread in the mucocutaneous and post-kala-azar types, and disseminated in the anergic cuta…