What Causes Enlarging Reddish Papule On Cheek?

A 62 y/o fair skinned male farmer presents to the dermatologist with a nine-month history of progressively enlarging reddish papule on his right cheek. Examination reveals a dome shaped “pearly” 3mm lesion with small superficial blood vessels. Describe the likely diagnosis; explain diagnostic tests that may be used and what information is obtained from them; and describe possible treatment options.