Cytokeratin-positive follicular dendritic cell sarcoma: A mimic of carcinoma

[摘要] A 34-year-old male presented with night sweats, fatigue, and anenlarging left neck mass. Computed tomography (CT) scan showed a5.6 × 4.2 × 3.7 cm necrotic mass in the left upper lateral carotid space.Histologic examination of an incisional biopsy of the mass demonstrated pleomorphic, plump spindle cells forming whorls with no discernable node architecture (Figure 1, panels A and B). The tumourcells were large with oval nuclei, vesicular chromatin, distinct nucleoli, and a moderate amount of eosinophilic cytoplasm.

[关键词] dendritic cells;diagnostic haematology;haematopathology