Myiasis refers to Diptera larvae infesting vertebrate animals. There are two forms of the disease: primary and secondary. In primary myiasis, fly larvae invade and develop in healthy tissue; in secondary myiasis, flies lay their eggs in skin ulcerations, and the larvae develop in tissue necrosis products. Furuncular myiasis is a type of primary myiasis. Treatment for it consists of techniques such as the production of localized hypoxia to force the emergence of the larvae, and mechanical or surgical removal of the maggots. These techniques, however, are painful and often unsuccessful. We propose a new technique for extraction of myiasis larvae, which might facilitate the surgical procedure and constitute a virtually painless and aesthetic option for the patient.

Resumo: A síndrome da unha amarela é uma doença rara, caracterizada pela tríade de linfedema, derrame pleural e unhas distróficas de crescimento lento e coloração amarelada. Várias associações já foram descritas, entre elas, afecções crônicas do aparelho respiratório, doenças autoimunes, malignidades e estados de imunodeficiência. Entre os casos citados na literatura, apenas cerca de um terço se apresenta com todos os achados e o caso relatado a seguir é um exemplo da tríade clássica. Palavras-chave: Derrame pleural; Doenças da unha; Linfedema Abstract: The yellow nail syndrome is a rare disease, in which there is a triad of lymphedema, pleural effusion and slow-growing dystrophic yellow nails. Many associations have already been described; among them, chronic respiratory tract diseases, autoimmune disorders, malignancies and immunodeficiency conditions. Only one third of cases in the literature show all findings. The case reported next is an example of the classical triad.

Hay-Wells syndrome is a rare form of ectodermal dysplasia initially described by Hay and Wells in 1976. It is an autosomal dominant disorder with varying forms of expression featuring congenital abnormalities of the skin, hair, teeth, nails and sweat glands. The present report describes the case of a 17-year old white boy, the son of nonconsanguineous parents, who presented ankyloblepharon filiforme adnatum, ectodermal dysplasia and a cleft palate at birth, which are considered cardinal signs of this syndrome by most authors. We also highlight the importance of implementing multidisciplinary follow-up of these patients.

Lupus vulgaris is a clinical variant of cutaneous tuberculosis, a rare subtype of extrapulmonary infection caused by the Mycobacterium tuberculosis complex. A paucibacillary form associated with high degrees of immunity, predominantly in the face, may present several clinical and histopathological differential diagnoses, which makes its diagnosis challenging. We present a case of lupus vulgaris in an immunocompetent patient, whose initial clinical presentation and histopathology did not suggest the condition. The objective is to highlight the relevance of the hypothesis of cutaneous tuberculosis as an important differential diagnosis, especially in endemic areas.