Bullous sclerodermalike changes in chronic graft-vs-host disease.

Area of Science:

• Dermatology
• Hematology
• Immunology

Background:

• Chronic cutaneous graft-versus-host reaction (cGVHD) commonly presents with sclerodermalike changes.
• Bone marrow transplantation (BMT) is a curative therapy for various hematologic malignancies and genetic disorders.

Observation:

• A patient developed vesicles and bullae on sclerodermoid skin 18 months post-BMT.
• Histopathological examination revealed subepidermal blisters with dilated lymphatics and dermal edema.
• Immunofluorescence microscopy showed no immunoreactant deposition.

Findings:

• Vesicles and bullae in cGVHD can occur in the subepidermal space.
• Dermal edema and lymphatic dilation are key microscopic findings.
• The absence of immunoreactant deposition suggests a non-autoimmune blistering mechanism.

Implications:

• Localized lymphedema is a potential contributing factor to vesicle and bulla formation in cGVHD.
• Understanding the pathogenesis of these lesions can guide future therapeutic strategies.
• This case expands the spectrum of cutaneous manifestations of cGVHD.