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Photos courtesy of: Bita Esmaeli, M.D. / M.D. Anderson Cancer Center
Used with permission. Not to be reproduced.

This 35-year-old man presented with a slow growing left medial canthal lesion.

1.	The most likely diagnosis is:
	a. squamous cell carcinoma b. basal cell carcinoma c. sebaceous gland carcinoma d. keratoacanthoma e. nevus
2.	The most common periocular site involved with this lesion is:
	a. upper lid > lower lid > medial canthus > lateral canthus b. lower lid > upper lid > medial canthus > lateral canthus c. lower lid > medial canthus > upper lid > lateral canthus d. upper lid > medial canthus > lower lid > lateral canthus e. all sites affected equally
3.	Histopathologic examination would show:
	a. squamous differentiation and keratin pearls b. sebaceous gland differentiation and pagetoid spread c. proliferation of basaloid cells with peripheral palisading, and retraction artifact d. nests of atypical melanocytes in the dermis e. keratin filled crater

For answers to the above, click here on or after January 19, 2010.