The lichen planus-like eruption after bone marrow transplantation

Area of Science:

• Dermatology
• Immunology
• Hematology

Background:

• Bone marrow transplantation (BMT) is a complex procedure with potential complications.
• Graft-versus-host reaction (GvHR) is a significant immunological complication following allogeneic BMT.
• Cutaneous manifestations following BMT require careful evaluation.

Observation:

• Four patients developed a distinctive skin and mucous membrane eruption post-BMT.
• The clinical presentation closely resembled lichen planus.
• Histopathological examination showed features similar to lichen planus.

Findings:

• The eruption occurred subsequent to immune-mediated basal cell damage linked to GvHR.
• A correlation was observed between GvHR markers and the onset or recurrence of the lichen planus-like eruption (LPLE).
• These findings suggest LPLE may be an immune-mediated phenomenon.

Implications:

• The lichen planus-like eruption following BMT could serve as a clinical indicator of chronic immune response.
• Understanding this association may improve diagnosis and management of post-transplant complications.
• Further research is warranted to elucidate the precise immune mechanisms involved.