Adnexal Tumors

A case of primitive non-neural granular cell tumor presenting as a single painless bleeding nodule

“…This makes differential diagnosis with other malignant and benign skin growths particularly difficult. As shown by our single case, dermoscopy does not allow for a correct diagnosis as it reveals unspecific pattern that have been reported in a range of tumors including pyogenic granuloma, amelanotic melanoma, non-pigmented melanoma metastases or other rare adnexal tumors [5–9]. Further reports are needed to improve the knowledge about the clinical and dermoscopic variability of this rare tumor.…”

Tristar Vessels: A Newly Described Dermoscopic Vessel Pattern of Miescher’s Nevus

“…Menzies et al reported that arborizing vessels were observed in 52% of pigmented BCCs (9). Although arborizing vessels were suggested to be a clue to diagnose the non-pigmented variant of BCC, they have also been recently observed in eccrine spiradenoma, neurothekeoma, hydradenoma, intraepidermal poroma and apocrine hydrocystomas (18,(20)(21)(22)(23)(24). Furthermore, it was reported that those vessels may be occasionally seen in irritated dermal nevi but there is no detailed data in the literature (9).…”

Dermoscopy of Nodular Hidradenoma, a Great Masquerader: A Morphological Study of 28 Cases

“…The bluish or brownish colour of some homogeneous areas could correspond histologically to the presence of increased melanin pigment observed in some cases, the presence of haemorrhage in some cystic spaces and/or to the Tyndall phenomenon, given the cystic nature and dermal localization of the tumour [4,5]. The histopathologic correlation of white structures (including chrysalis) could be the presence of the fibrovascular or even hyalinized stroma, which is characteristic of this tumour [3,4]. A large proportion of hidradenomas appear highly vascular, even resulting occasionally in hemangiopericytoma-like areas [1] (branching vascular pattern with a staghorn configuration), which is the reason for the presence of dermoscopic vascular structures in 82% of the cases.…”