Epidermoid Cyst and Pilar Cyst Charles A. Gropper (ICD-9 706.2) Symptoms and Signs Cysts are asymptomatic until they become inflamed. They are among the most common skin lesions. Patients present…

Skin Tags Charles A. Gropper (ICD-9 701.9) Symptoms and Signs Skin tags are asymptomatic. They are extremely common, small (1 to 3 mm), flesh-colored or brown papules. They are usually…

Dermatofibroma James C. Shaw (ICD-9 216.9) Symptoms and Signs Patients with dermatofibroma (DF) present with an asymptomatic smooth, firm, round, brownish papule or nodule, usually measuring less than 1 cm…

Dysplastic Nevus James C. Shaw (ICD-9 238.9) Symptoms and Signs Dysplastic nevi (DN), also called Clark’s nevi, or atypical nevi, are asymptomatic. Patients may have only a single lesion or…

Malignant Melanoma James C. Shaw (ICD-9 172.3 Face; 172.4 Scalp, Neck; 172.5 Trunk; 172.6 Upper Extremity; 172.7 Lower Extremity) Symptoms and Signs Malignant melanoma (MM) is usually asymptomatic. Sometimes it…

Halo Nevus John T. Crissey (ICD-9 M8723/0) Signs and Symptoms Itching and varying degrees of erythema may precede or accompany the development of the characteristic depigmented ring of the halo…

Melanocytic Nevus David H. Frankel (ICD-9 216.3 FACE; 216.4 SCALP, NECK; 216.5 TRUNK; 216.6 UPPER EXTREMITY; 216.7 LOWER EXTREMITY) Symptoms and Signs Junctional, compound, and intradermal nevi are benign lesions…

Basal Cell Carcinoma James C. Shaw (ICD-9 173.3 HEAD, EAR; 173.4 SCALP, NECK; 173.5 TRUNK; 173.6 UPPER EXTREMITY; 173.7 LOWER EXTREMITY) Symptoms and Signs The presentation of basal cell carcinoma…

Keratoacanthoma James C. Shaw (ICD-9 238.2) Symptoms and Signs Keratoacanthomas (KA) are usually asymptomatic and develop rapidly over 2 to 6 weeks. The rapid enlargement of a dome-shaped nodule of…

Actinic Keratosis David H. Frankel (ICD-9 702.2) Symptoms and Signs Actinic keratoses (AK), in general, are asymptomatic. Sometimes patients complain of itching or burning but when present, these symptoms should…