Sarcoma de Kaposi clásico ganglionar: comunicación de tres casos / Lymph node involvement in classic Kaposi sarcoma: report of three cases

Classic Kaposi s sarcoma (KS) affects lower extremities in older adults, showing a progressive, benign course. It can also involve oral mucosa and gastrointestinal tract with a lower frequency. The involvement of internal organs and lymph nodes is rare, and its primary compromise is even more uncommon. We report an unusual presentation of classic KS in the lymph nodes of three patients. A 46 years old male had a primary involvement of an inguinal lymph node. Dermal involvement appeared one year later. A 58years old male and a 76years old female with simultaneous dermal and lymph node involvement. We conclude that the presence of classic KS in our region is more common than previously considered. Moreover, it must be emphasized that KS in lymph nodes can affect HIV-negative patients or patients without any associated immune deficiency.

Enfermedades infecciosas emergentes y reemergentes en Latinoamérica: lo que el dermatólogo debe saber / Emerging and reemerging infectious diseases in Latin America

En los últimos años nuevas enfermedades infecciosas desconocidas o poco conocidas en Latinoamérica han aparecido en la consulta del dermatólogo. La presente discusión incluye cuatro entidades de este tipo. La úlcera de Buruli es una infección crónica de la piel producida por el Mycobacterium ulcerans y se caracteriza por presentar úlceras de bordes socavados. La infección cutánea por amebas de vida libre, especialmente las causadas por Balamuthia mandrillaris, se presenta clásicamente con una lesión de tipo placa infiltrativa, con frecuencia centrofacial y ocasionalmente en extremidades. La gnathomiasis, típica de aquellos cuyas costumbres culinarias incluyen la ingesta de pescado crudo, se presenta como una paniculitis migratoria que va acompañada de marcada eosinofilia tisular. Por último, la dermatitis infectiva, un cuadro eccematoso en directa conexión con la infección por el virus HTLV1, se caracteriza por compromiso recurrente del cuero cabelludo, cara y zonas intertriginosas.

In recent years new infectious diseases unknown or infrequent in Latin America have appeared in dermatology practice. We present four of these disorders. Buruli ulcer is a chronic skin infection caused by Mycobecterium ulcerans and is characterized by the present of large ulcerations with undermined borders. Cutaneous infections caused by free amebas, especially those caused by Balamuthia mandrillaris, manifest as an infiltrating plaque, commonly located on the central face and occasionally on extremities. Gnathomiasis, typical of people who eat raw fish, present as a migratory paniculitis, accompanied by marked tissue eosinophilia and finally, infective dermatitis, an eczematous process in direct relation to HTLV1 infection, which is characterizes by recurrent involvement of scalp, face and intertriginous areas.