reniform nuclei

CD1+S100+ – Friday Pop Quiz 01/22
by NEXT STEPS IN DERM TEAM on
  A 24 month-old infant presents with red-brown, crusted papules with petechiae in a seborrheic distribution. A biopsy is done to confirm a diagnosis. Which histologic picture is most likely? A. CD1-, S100- cells with reniform nuclei B. Foamy histiocytes with Touton giant cells C. CD1+, S100+ cells with reniform nuclei D. Mixed cellular infiltrate in a “ball and claw …