Skin involvement by NTRK1-rearranged histiocytosis. (A) Single lesion on the eyelid of a 2-year-old girl (AP13). (B-C) Skin lesions of a 70-year-old female (AP11). (D-E) Multiple skin lesions of a female newborn (AP27). (F) Multiple skin nodules of a male newborn (AP24).