BACKGROUND AND DESIGN
The cutaneous eruptions due to allogeneic graft-vs-host disease, autologous graft-vs-host disease, and lymphocyte recovery occur in the setting of peripheral leukocyte reconstitution after marrow aplasia. Since the eruptions of lymphocyte recovery (ELR) and autologous graft-vs-host disease develop in the presence of histocompatibility, we question whether reliable histologic differentiation is possible. To this end, we performed a retrospective, blind analysis of 38 skin biopsy specimens obtained from patients who received autologous marrow transplants or intensive chemotherapy alone for various malignant neoplasms.
RESULTS
In 31% of the cases, we were unable to distinguish between an ELR and a grade 2 graft-vs-host reaction. In 40% of the ELR specimens, a significant number of dyskeratotic keratinocytes were present, leading to the false interpretation of a grade 2 graft-vs-host reaction. Satellite cell necrosis was observed in both groups. The patterns of dyskeratotic keratinocytes were similar; one ELR specimen displayed prominent follicular involvement. Most ELR specimens were consistent with grade 1 graft-vs-host reaction changes.
CONCLUSIONS
These findings indicate that the presence of dyskeratotic keratinocytes is not specific for a graft-vs-host reaction and that cutaneous eruptions after autologous marrow transplantation are best considered an ELR.
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