O/E: 8 mm papule with two distinct parts. One is a pearly papule with tortuous vessels and the other is a greasy keratotic papule with a pebbly surface.
Photos:
Plan: Scheduled for excision
Reference:Letter: Collision tumor: importance of the new auxiliary tools for diagnosis (an illustrative case report). Free Full Text
Menezes N, et. al. Dermatol Online J. 2011 Jul 15;17(7):12.
Abstract: Collision tumor is a term used to refer to the
association of various types of tumors in time and space. Despite most of them
not being clinically relevant, sometimes there is a union between a benign
lesion and a malignant one. The clinical diagnosis in these cases is usually
extremely difficult, particularly if one of the lesions is pigmented.
Dermoscopy and confocal microscopy are noninvasive diagnostic methods that make
possible the visualization of morphologic structures not visible to the naked
eye, thus making diagnosis of these lesions possible. Here we describe a case
in which the corrected diagnosis of a collision between a seborrheic keratosis
and a basal cell carcinoma was only possible by means of confocal microscopy.
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