Papular xanthoma
MONDO:0015536Papular xanthoma is a form of non-Langerhans cell histiocytosis characterized by cutaneous presentation of solitary or disseminated yellow to orange-brown papular or papulonodular, noncoalescent, asymptomatic skin lesions located predominantly on the head, neck, trunk and extremities (rarely on oral mucosa), in the presence of normolipidemia. Microscopically, the lesions consist of monomorphous infiltrate of xanthomatized macrophages and numerous Touton giant cells, with scant or absent inflammatory infiltrate. It is usually not associated with systemic disease.
7 clinical trials for this condition and its sub-types, 0 tagged with Papular xanthoma itself.
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New pill shows promise for rare childhood diseases
Disease control Recruiting nowThis phase 2 trial is testing the drug mirdametinib in 40 people aged 2 and older with Langerhans cell histiocytosis or similar disorders. The goal is to see if this oral medication works better and has fewer side effects than current treatments. Participants take the drug twice …
Phase 2 • Sponsor: Children's Hospital Medical Center, Cincinnati • Aim: Disease control
Last updated Jun 26, 2026 18:37 UTC
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500 patients needed to unlock secrets of rare histiocytic disorders
Knowledge-focused Recruiting nowThis study at Mayo Clinic will collect medical histories and blood, fluid, or tissue samples from 500 people with histiocytic disorders. Researchers will analyze these samples for molecular markers like BRAF V600E and PD-L1 to better understand the diseases. The goal is to gather…
Sponsor: Mayo Clinic • Aim: Knowledge-focused
Last updated Aug 06, 2026 00:00 UTC