An 83-year-old man complains that for the last few weeks he has had a bleeding lesion on his chest that seems to be growing rapidly. The lesion is shown below. What is the single most likely diagnosis?
Basal cell carcinoma
Malignant melanoma
Seborrheic keratosis
Squamous cell carcinoma
This is a Squamous cell carcinoma. Sun-exposed skin in areas such as the head, neck, hands, and arms represent other typical sites of involvement. Bleeding, rapid growth and irregular surface differentiate from a seborrhoeic keratosis or wa. Basal cell carcinoma has a rolled edge, shows central ulceration and a pearly rolled telangiectatic tumor border.
Tumours of skin