A previously healthy 28-year-old lady arrives at the clinic for an assessment of a raised, pigmented skin lesion on her leg. The woman has had no itching or pain and has no idea how long she has had the lesion. She has used tanning beds in the past but denies excessive sun exposure. Her father was just diagnosed with skin cancer, so she is very concerned about the possibility of cancer. A skin examination reveals the nodule seen in the figure below. A biopsy of the lesion reveals nests of uniform round cells at the basal portion of the epidermis that extend into the underlying dermis. The cells contain inconspicuous nucleoli and show no mitotic activity. Which of the following is the most likely diagnosis?

Question

A previously healthy 28-year-old lady arrives at the clinic for an assessment of a raised, pigmented skin lesion on her leg. The woman has had no itching or pain and has no idea how long she has had the lesion. She has used tanning beds in the past but denies excessive sun exposure. Her father was just diagnosed with skin cancer, so she is very concerned about the possibility of cancer. A skin examination reveals the nodule seen in the figure below.  A biopsy of the lesion reveals nests of uniform round cells at the basal portion of the epidermis that extend into the underlying dermis.  The cells contain inconspicuous nucleoli and show no mitotic activity.  Which of the following is the most likely diagnosis?

Quizplus · Accepted Answer

Eductional Objective: Compound nevi are melanocyte proliferations that include both the dermis and the epidermis. Lesions have the appearance of slightly elevated papules with homogeneous pigmentation and symmetrical sharp edges.

A Previously Healthy 28-Year-Old Lady Arrives at the Clinic for an Assessment