[Clear cell acanthoma. Presentation of a case]. / Acantoma de células claras. Presentación de un caso.

A case of a 72 year-old woman, with a verrucous lesion was presented. The lesion was characterized by a purple colour and measured 2 X 1.5 cm. in diameter. The patient had the lesion for 1 year and reported previous repetitive traumas, suggesting a clinical diagnosis of traumatic seborrheic keratosis. The histological study reveal a clear cell acanthoma.

[Perforating annular granuloma]. / Granuloma anular perforante.

This study presents the first Venezuelan case of perforating granuloma annulare in an eleven year-old patient. The cutaneous eruption was characterized by minute lichenoid papules which have persisted for two years. These lesions were asymptomatic and most perforating, appearing in the dorsal side of hands and fingers. The histopathological study showed a classical granuloma annulare with sites of necrobiosis and perforation of the epithelium. This "transepithelial perforation" allows the elimination of collagen and cell detritus observed. The patient responds well to the injection of steroids into lesions.

[Atypical glomus tumor. Report of a case]. / Tumor glómico atípico. Reporte de un caso.

The solitary glomus tumor is considered by many authors a benign cutaneous neoplasm which gives rise to severe paroxysmal pains and it is frequently localized in the subungual region. Malignant glomus tumors have not been found in the skin but if in the stomach and duodenum. This study reports a case of 62 year old woman with a painful red nodule of 0.80 cm. in diameter, situated on the dorsal right arm. The duration of illness was unknown. Histopathologic studies showed a dermal tumor characterized by multilobulated masses composed of glomus cells and a high portion of anaplastic, pleomorphic cells. Cytochemical stain showed a myxoid matrix composed of nonsulphated acid mucopolysaccharides in which the tumor mass lies.

[Cruorifilaria tuberocauda (Nematoda: Filarioidea) in Venezuelan capybaras]. / La Cruorifilaria tuberocauda (Nematoda: Filarioidea) en capibaras de Venezuela.

Four filariae are known to parasitize the capybara "Hydrochoerus hydrochaeris" namely the "Cruorifilaria tuberocauda", Eberhard, Morales & Orihel (1976). The "Dipetalonema (Alafilaria) hydrochoerus", Yates (1983), and two "mansonella" recently described by Eberhard, Campo-Aasen & Orihel (1983), "Mansonella longicapita" and "Mansonella rotundicapita". In this study we describe the adult parasites and the microfilaria of the "Cruorifilaria tuberocauda" (Nematoda, Filarioidea), Eberhard, Morales & Orihel (1976) obtained from the arteries of the kidney of two capybaras from Apure and Barinas states of Venezuela. The pathology produced by the presence of the filariae in kidney and lungs of the animals is described as well as the blood harboring microfilaria.