This patient is a 72-year-old male who presented with a 10-day history of "bumps" on his trunk and lower extremities. Lytic bone lesions were present on x-ray evaluation.

Physical examination It revealed firm, non-tender, erythematous to violaceous nodules on the thighs, inguinal region and back (images attached) What can be the probable diagnosis for this patient? *This case is from Docplexus editorial team for educative purpose only Source: Washington School of Medicine