Langerhans' cell histiocytosis with neurological injuries diagnosed from a single cutaneous lesion.

Histiocytoses are rare diseases caused by the proliferation of histiocytes. The pathogenesis remains unknown and the highest incidence occurs in pediatric patients. The clinical presentations can be varied, in multiple organs and systems, and the skin lesions are not always present.

Paracoccidioidomycosis with sarcoid-like lesions:a diagnostic challenge.

Clinical presentation of paracoccidioidomycosis (PCM) can be diverse. Morphology and quantity of skin lesions depends on interactions between host immunity and fungus virulence. Diagnosis can be a challenge considering that this fungus has low virulence and some individuals have immunity to microorganism, which results in well-marked granulomas without visible microorganisms.

Importance of multidisciplinary approach in diagnosis of histoplasmosis.

A patient with systemic involvement, initially treated as tuberculosis, is presented in this report. There were only two painful subcutaneous nodules, from which we arrived at the correct diagnosis of histoplasmosis. The patient was attended by several experts in the fields of infectious diseases, nephrology and internal medicine, but the diagnosis was only possible after dermatological examination and skin biopsy.