Often occurring on the trunk, superficial basal cell carcinomas may appear as well-demarcated erythematous plaques that may be easily confused with psoriasis, nummular eczema, or tinea corporis. As basal cell carcinomas grow, they may produce areas of apparent regression. These morpheaform areas clinically appear as a scar, but the tumor often extends histologically well beyond the clinically visible area. Diagnosis and Treatment Diagnosis of basal cell carcinoma is obtained through histologic verification. A shave biopsy performed with local anesthesia is often the most useful approach to the diagnosis.
Surgical removal is the therapy of choice for basal cell carcinoma.
This technique is reserved for superficial basal cell carcinomas. Biopsy and removal of these tumors are best performed by the dermatologist or other practitioner who is familiar with them. The primary care physician's role is important for detection, patient education and follow-up.