A 73-year-old man was referred to the dermatology clinic with a 6-month history of a solitary red lesion on the right cheek. On examination there was a 12 x 6 mm nontender, flaccid, red thick-walled bulla on the right cheek with a firm nodular component. Histology demonstrated islands of basaloid cells with central abrupt keratinization, ghost cells and some fragmentation of the dermis. What is the diagnosis?
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Monash Med Ctr, Dept Dermatol, Melbourne, Vic, Australia
Univ Melbourne, Fac Med Dent & Hlth Sci, Parkville, Vic, AustraliaMonash Med Ctr, Dept Dermatol, Melbourne, Vic, Australia
Punchihewa, Nisal
Tandon, Smriti
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Monash Med Ctr, Dept Dermatol, Melbourne, Vic, AustraliaMonash Med Ctr, Dept Dermatol, Melbourne, Vic, Australia
Tandon, Smriti
Poon, Flora
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Monash Med Ctr, Dept Dermatol, Melbourne, Vic, AustraliaMonash Med Ctr, Dept Dermatol, Melbourne, Vic, Australia
Poon, Flora
Pawlowski, Rhonda
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Monash Med Ctr, Dept Anat Pathol, Melbourne, Vic, AustraliaMonash Med Ctr, Dept Dermatol, Melbourne, Vic, Australia
Pawlowski, Rhonda
Chan, Yuen
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Monash Med Ctr, Dept Anat Pathol, Melbourne, Vic, AustraliaMonash Med Ctr, Dept Dermatol, Melbourne, Vic, Australia
Chan, Yuen
Mar, Adrian
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Monash Med Ctr, Dept Dermatol, Melbourne, Vic, AustraliaMonash Med Ctr, Dept Dermatol, Melbourne, Vic, Australia