Follicular dendritic cell sarcoma (FDCS) are uncommon malignant neoplasms that can involve lymph nodes or extranodal sites. They can exhibit a broad spectrum of histologic appearences and behavior, but usually pursue an aggressive course. A case of follicular dendritic cell sarcoma arised in the tonsil region is reported in a 37-year-old man. He had a swelling in the left retromolar trigone. Clinical examination disclosed an ulcerated mass. CT scans showed a low density lesion in the left medial parapharyngeal area. The biopsy specimen was insatisfatory and the patient underwent successful surgical excision of the tumor which was extended to palatine tonsil adjacent and right palatine tonsil. The specimen revealed a low grade malignant tumor and immunohistochemical has confirmed the diagnosis. FDCS should be considered in the differential diagnosis of any spindled cell tumor with interspersed chronic inflammatory cells occurring in head and neck regions . This tumor exhibits distinctive histologic features that permit its presumptive diagnosis, but a final diagnosis requires confirmation with special studies.
Sarcoma; Follicular dendritic cell; Lymph nodes
