text: <unk>  cell carcinoma is a very rare and highly aggressive skin<unk> .<unk>  cell carcinoma is the most serious form of skin<unk> . When<unk>  cell carcinoma spreads to the lymph nodes, the average 5-year survival rate for a patient with<unk>  cell carcinoma is less than 50 percent. Recurrence may occur in up to half of all the patients with<unk>  cell carcinoma.<unk>  usually occurs on either the face, head, or neck. Patients with<unk>  cell carcinoma usually present with a rapid growing, firm, painless, red/violaceous skin lesion.<unk>  cell carcinoma usually metastasizes first to regional lymph nodes and then to other organs, and spreads to other parts of the body, especially the liver, lungs, brain and bones. The predominant therapy for<unk>  cell carcinoma is surgical resection, but chemoradiation may also be required in more advanced disease.
option_0: Merkel cell cancer
option_1: Basal cell carcinoma
option_2: Squamous cell carcinoma of the skin
option_3: Lymphoepithelioma
option_4: Sebaceous gland carcinoma
option_5: Angiokeratoma
option_6: Trichoepithelioma
option_7: Lymphangioma circumscriptum