Complete Remission in Systemic Skin Interdigitating Dendritic Cell Sarcoma after ABVD Chemotherapy

Area of Science:

• Oncology
• Hematology
• Dermatopathology

Background:

• Interdigitating dendritic cell sarcoma (IDCS) is a rare, aggressive neoplasm originating from dendritic cells.
• Typically affects lymph nodes, but can involve extranodal sites, including skin and bone marrow.

Observation:

• A 62-year-old male presented with multiple skin nodules on the head, body, and extremities, along with bone marrow involvement.
• Histopathological and immunohistochemical analysis confirmed the diagnosis of IDCS, with tumor cells positive for CD4, CD45, CD68, and S-100 protein.

Findings:

• The patient achieved complete remission after 6 cycles of ABVD (adriamycin, bleomycin, vinblastine, dacarbazine) chemotherapy.
• Tumor cells exhibited characteristic IDCS-associated antigen expression.

Implications:

• This case suggests ABVD chemotherapy may be an effective treatment for IDCS, particularly in patients with extensive cutaneous involvement.
• Further research is warranted to establish optimal treatment protocols for this rare malignancy.