Periungual basal cell carcinoma is rare and needs to be differentiated from other common diseases that affect this region. Several factors are associated with the development of this tumor, and sun damage seems to play an important role in its pathogenesis. Dermoscopy of clinically indolent lesions on the nail unit can shorten the diagnostic process and avoid destructive treatment and functional damage.
RESUMODe etiologia desconhecida, a mucinose folicular primária ou idiopática se caracteriza clinicamente como afecção inflamatória, com placas mais ou menos infiltradas e descamativas, com ou sem perda de pelos. Na sua forma secundária, costuma apresentar lesões mais numerosas e difusas, com morfologia variá-vel, desde placas até nódulos ulcerados. É representada por depósitos localizados ou difusos de mucina na pele ou nos folículos pilosos. Objetivo: Apresentar um caso incomum de mucinose folicular primária, de importância da diferenciação com a forma secundária de mucinose folicular, discutir os aspectos clínicos e histopatológicos utilizados no diagnóstico, suas características e classificações, bem como as possíveis escolhas terapêuticas. Palavras-chaves:Mucinoses. Linfoma. Histopatologia. ABSTRACTOf unknown etiology, acute follicular mucinosis is clinically characterized as an inflammatory disease coursing with more or less infiltrated and scaly plaques, with or without hair loss. In the chronic form, it usually has more numerous and diffuse lesions with variable morphology, from plaques to ulcerated nodules. It is characterized by localized or diffuse deposits of mucin in the skin or hair follicles. Objective: To present an unusual case of primary follicular mucinosis, the importance of differentiation from the secondary form of follicular mucinosis, to discuss the clinical and histopathological aspects used in the diagnosis, its characteristics and classifications as well as the possible therapeutic choices.Key words: Mucinosis. Lymphoma. Histopathology. Relato de Caso IntroduçãoA Mucinose Folicular é uma doença inflamatória relativamente rara, de etiologia incerta, caracterizada por acúmulo de mucina e linfócitos na porção infundibular do aparelho pilossebáceo, promovendo destruição total e irreversível do local afetado. Os achados clínicos são variados porém as manifestações mais típicas incluem placas que podem ser hipopigmentadas, eczematosas ou com
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