Review Question - QID 212766

A 29-year-old woman comes to the dermatologist complaining of a firm nodule on her leg. She believes that it started as a bug bite 1 year ago that scarred and didn’t go away. She is annoyed with it now because it gets in the way of shaving. She denies pain, bleeding, or pruritis. She has no significant past medical history. She had her tonsils removed as a child. Her maternal grandmother had stage 2 melanoma, and her father has had 2 superficial skin cancers removed from his arm and face. She smokes a half pack of cigarettes a day. She is recently single and has been sexually active with multiple partners for the past month. She currently works as an outdoor day camp counselor. A firm nodule is appreciated on the patient’s right leg, as shown in Figure A. The nodule dimples in the middle when pinched. Which of the following is associated with the patient’s most likely diagnosis?