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Regressing ulcerative histiocytosis.

Y Horiguchi1, T Tanaka, K Toda

  • 1Department of Dermatology, Faculty of Medicine, Kyoto University, Japan.

The American Journal of Dermatopathology
|April 1, 1989
PubMed
Summary
This summary is machine-generated.

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A rare skin condition, regressing ulcerative histiocytosis, presented as ulcerating skin plaques in a teen. This histiocyte proliferation condition resolved with clofazimine therapy.

Area of Science:

  • Dermatology
  • Histopathology

Background:

  • Cutaneous histiocytic proliferations encompass a spectrum of conditions.
  • Distinguishing between inflammatory, neoplastic, and reactive histiocytic processes is crucial for diagnosis and management.

Observation:

  • A 15-year-old female presented with multiple erythematous, indurated plaques on the trunk, scalp, and extremities.
  • Lesions ulcerated spontaneously and healed within 2-3 months.
  • Histopathology revealed dermal proliferation of mature histiocytes without lymph node, bone marrow, or internal organ involvement.

Findings:

  • The condition, tentatively named regressing ulcerative histiocytosis, showed resistance to potassium iodide, corticosteroid, and cyclophosphamide therapies.
  • Complete recovery was achieved with a 2-year course of clofazimine.

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Implications:

  • This case highlights an unusual, self-regressing form of cutaneous histiocytic proliferation.
  • Clofazimine may be an effective treatment for this rare condition.
  • Further research is needed to understand the pathogenesis and long-term outcomes of regressing ulcerative histiocytosis.