Interdigitating dendritic cell sarcoma (IDCS) is an extremely rare malignancy derived from professional antigen presenting cells. This report describes a case of IDCS arising in the salivary gland associated lymphoid tissue of the parotid gland of a 51 year woman, presenting with a painless neck swelling. Histologically, sheets of S100+/Ccd68+/CD45+/CD34−/CD1a− spindle cells were surrounded with an inflammatory infiltrate with no evidence of B or T cell clonal proliferations. No evidence of either human herpesvirus 8 or Epstein-Barr virus could be detected by quantitative polymerase chain reaction in the tumour cells with serological evidence of previous Epstein-Barr virus infection. The patient remains well and disease free 24 months after presentation without specific treatment.
- interdigitating dendritic cell sarcoma
- Kaposi’s sarcoma associated herpes virus
- Epstein-Barr virus
- EBV, Epstein-Barr virus
- FDC, follicular dendritic cell
- HHV, human herpesvirus
- IDC, interdigitating dendritic cell
- IDCS, interdigitating dendritic cell sarcoma
- IgH, immunoglobulin heavy chain
- PCR, polymerase chain reaction
- TCR, T cell receptor
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