Basal cell carcinoma is the most frequent skin cancer, generally located in hair-bearing, sunlight-exposed areas. Basal cell carcinoma usually occurs on the head and neck, but very rarely on extra-facial locations. We report a case of a 65-year-old woman presenting with a solitary non-healing ulcer on the sole of the right foot for two years. Histopathological examination showed a typical nodular basal cell carcinoma, confirmed by positivity to Ber-EP4 on immunohistochemistry. There was no history of trauma, exposure to noxious agents, basal cell nevus syndrome, or xeroderma pigmentosum.
This article was published in the following journal.
Name: Anais brasileiros de dermatologia
ISSN: 1806-4841
Pages: 419-421
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Carcinoma, Merkel Cell
A carcinoma arising from MERKEL CELLS located in the basal layer of the epidermis and occurring most commonly as a primary neuroendocrine carcinoma of the skin. Merkel cells are tactile cells of neuroectodermal origin and histologically show neurosecretory granules. The skin of the head and neck are a common site of Merkel cell carcinoma, occurring generally in elderly patients. (Holland et al., Cancer Medicine, 3d ed, p1245)
Patched-2 Receptor
A patched receptor that may function redundantly with the PATCHED-1 RECEPTOR to modulate hedgehog signaling. It may also play a role in epidermal development and as a TUMOR SUPPRESSOR PROTEIN. Mutations in the patched-2 gene are associated with BASAL CELL NEVUS SYNDROME; CARCINOMA, BASAL CELL; and MEDULLOBLASTOMA.
Keratoacanthoma
A benign, non-neoplastic, usually self-limiting epithelial lesion closely resembling squamous cell carcinoma clinically and histopathologically. It occurs in solitary, multiple, and eruptive forms. The solitary and multiple forms occur on sunlight exposed areas and are identical histologically; they affect primarily white males. The eruptive form usually involves both sexes and appears as a generalized papular eruption.
Fasciitis, Plantar
Inflammation of the thick tissue on the bottom of the foot (plantar fascia) causing HEEL pain. The plantar fascia (also called plantar aponeurosis) are bands of fibrous tissue extending from the calcaneal tuberosity to the TOES. The etiology of plantar fasciitis remains controversial but is likely to involve a biomechanical imbalance. Though often presenting along with HEEL SPUR, they do not appear to be causally related.
Carcinoma, Basosquamous
A skin carcinoma that histologically exhibits both basal and squamous elements. (From Dorland, 27th ed)