Nevo de Reed (nevo de células fusiformes): relato de três casos com padrões dermatoscópicos distintos

Abstract

Abstract:Reed nevus or pigmented spindle-cell nevus may mimic cutaneous melanoma; however, its dermoscopic and histopathological characteristics are different. This case report describes three patients with distinct clinical, dermoscopic and histopathological presentations, which were correlated to enable a differential diagnosis to be made between melanoma and Spitz nevus Keywords: Dermoscopy; Melanoma; Nevus, spindle cell Resumo: O nevo de Reed ou nevo de células fusiformes pigmentado pode ser um simulador do melanoma cutâneo. Apresenta, entretanto, diferentes características dermatoscópicas e histopatológicas. Trata-se de relato de três pacientes com apresentações clínicas, dermatoscópicas e histopatológicas distintas, correlacionando-as no auxílio diagnóstico deste com o melanoma e nevo de Sptiz.

Spitz nevus and Reed nevus

“…This is a pattern with prominent central pigmentation, diffuse, bluish-gray or black, also called black lamella, corresponding to the region of greatest parakeratosis, and streaks distributed around the lesion that correlate to areas of cell nest compression observed in histopathology. 14 19.4% of the cases have regular and prominent pigment network, and 8.3%, have a bluish-black pigmentation without streaks in the periphery (Figures 3 and 4).…”

“…It is also called dermatoscopy, surface microscopy and epiluminescence microscopy. 7,18,27 Three main dermoscopic patterns have been recognized: 1,8,14 1 -Starburst pattern, observed in 53% of the cases. This is a pattern with prominent central pigmentation, diffuse, bluish-gray or black, also called black lamella, corresponding to the region of greatest parakeratosis, and streaks distributed around the lesion that correlate to areas of cell nest compression observed in histopathology.…”

“…However, there is still no consensus in the literature. 8 In 1975, Reed et al 7,[11][12][13][14][15] described a deeply pigmented melanocytic lesion, also benign, found especially in the lower extremities of young adults. Some authors consider it as a single nosological entity, but others refer to it as a pigmented variant of the classic Spitz nevus, with its own clinical and histological features.…”

“…Some authors consider it as a single nosological entity, but others refer to it as a pigmented variant of the classic Spitz nevus, with its own clinical and histological features. 6,7,11,12,13,14,16,17 Whether Spitz and Reed nevi are distinct lesions is still debatable. 6 For this reason, some authors try to differentiate them in histological types, but there are controversies, as the combination of their microscopic characteristics is very common.…”

“…4 Reed nevus is characterized by a dark brown or black papule or plaque, often affecting the lower limbs of young women around the third decade of life; however, it can occur in children and young adults of both sexes ( Figure 2). 11,14,16,21 It is usually smaller than Spitz nevus. 16 It can grow fast.…”