Punch biopsy of the lesion revealed a pigmented basal cell carcinoma. The tumor, which was found to infiltrate to the muscle, was successfully surgically excised. These include a symmetry, b order irregularity, c olor variegation and d iameter greater than 6 mm. However, the rolled borders and pearly quality of the lesion are not typical of melanoma. Seborrheic keratoses are benign lesions that can exhibit varied pigmentation.
Venous lakes are vascular lesions that typically occur on the lips or ears.
Clinically, they may be dark purple or even black and thus mimic pigmented lesions. However, they do not reach the large size or exhibit the irregular pigment seen in this lesion. Skin tags are usually located in intertriginous areas such as the axillae or neck. They are typically small, flesh-colored to tan pedunculated papules, although they will occasionally undergo a color change if they become thrombosed or necrotic. Nonmelanoma skin cancers are by far the most common type of cancer in the United States, with an incidence similar to that of all noncutaneous malignancies combined.