QuestionSBA
QuestionChoice
This is the most likely diagnosis based on the short history of a fast-growing lesion on an area that is frequently sun exposed. The ulcerated core is also characteristic of squamous cell carcinoma.
10001382
a
Squamous cell carcinoma
QuestionChoice
Seborrheic keratosis presents as brown lesions with a 'stuck on' appearance; they are benign skin growths and are very common.
10001385
d
Seborrheic keratosis
QuestionChoice
Keratoacanthomas present as rapidly growing skin tumours with a dome shape and a central keratin-filled crater.
10001386
e
Keratoacanthoma
QuestionChoice
Although basal cell carcinomas are found on sun-exposed areas, they are slower growing than squamous cell carcinomas. Also, basal cell carcinomas usually have a pearly rolled edge and surrounding telangiectasia.
10001383
b
Basal cell carcinoma
QuestionChoice
Actinic keratoses are found on areas of sun-exposed skin, but are not malignant and do not present with an ulcerated core.
10001384
c
Actinic keratosis
Concept
Chapter
2693
3920
squamous cell carcinoma
Topic
144
Dermatology
12823
A 55-year-old man presents to his GP with a lesion on the pinna of his ear which appeared last month and has since increased in size. On examination, there is a 6mm lesion with irregular borders and an ulcerated core. Vital signs are normal and there is no significant past medical history.

What is the most likely diagnosis?
a