PMC3806685_01
Proliferating trichilemmal tumor on the nose of a man.
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F1
A 70-year-old white man, born in Buenos Aires, Argentina, visited for a consultation about a localized swelling on the tip of his nose and an external orifice with serosanguineous discharge (fig. 1, fig. 2).
Wall of the intradermal cystic structure, covered by stratified pavimentary epithelium, partly with and partly without the formation of a granular layer, and with larger cells (HE, x40).
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F3
This histopathological picture was interpreted as suggestive of adnexal neoplasia with pilar differentiation and a possible proliferating epidermoid cyst (fig. 3, fig. 4, fig. 5).
Detail of the solid portion of the neoplasia, composed of large cells with eosinophilic cytoplasma, prominent nucleoli, and atypical cells to a moderate degree (HE, x400).
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F5
This histopathological picture was interpreted as suggestive of adnexal neoplasia with pilar differentiation and a possible proliferating epidermoid cyst (fig. 3, fig. 4, fig. 5).
Aspect immediately after total surgical removal.
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F6
The lesion had already relapsed 45 days later, and another surgery was performed (fig. 6).
Four months after the removal of the tumor.
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F7
The patient has been monitored since then without a recurrence of the lesion (fig. 7).