Mr. Rossi, a fisherman in his late sixties, comes to the clinic to complain of small ulcers on both forearms as well as on his face and ears. Although he has had them for several years, he has not had any other problems. What is the likely diagnosis, and what is the likely cause? Solution What is the likely diagnosis, and what is the likely cause? The most likely diagnosis for Mr. Rossi, a fisherman is basal cell carcinoma------answer Because it causes ulcers . It is slow to metastasize and spread to other areas, cause : several years of exposure to sunlight may be caused his cancer..