Monarch Disease Ontology entry MONDO_0005764 (follicular dendritic cell sarcoma) is a neoplasm composed of spindle to ovoid cells which have morphologic and immunophenotypic characteristics of follicular dendritic cells. It affects lymph nodes and other sites including the tonsils, gastrointestinal tract, spleen, liver, soft tissues, skin, and oral cavity. It usually behaves as a low grade sarcoma. Treatment options include complete surgical removal of the tumor with or without adjuvant chemotherapy or radiotherapy. Recurrences have been reported in up to half of the cases. Also known as: follicular Dendritic cell sarcoma, follicular Dendritic cell sarcoma/tumor, follicular dendritic cell tumor, follicular dendritic cell tumour, sarcoma of follicular dendritic cell.