C4A.2 - Merkel cell carcinoma of ear and external auricular canal C4A - Merkel cell carcinoma C4A.2 - Merkel cell carcinoma of ear and external auricular canal
C4A.20 - Merkel cell carcinoma of unspecified ear and external auricular canal C4A.21 - Merkel cell carcinoma of right ear and external auricular canal C4A.22 - Merkel cell carcinoma of left ear and external auricular canal