Clinicopathological features and prognosis assessment of extranodal follicular dendritic cell sarcoma

Table 1 Clinicopathological and therapeutic data of nine new cases of extranodal FDC sarcoma (Cases 1-9)

Case No.	Age (yr)	Gender	Sites	Size (cm)	HG	MC (/10 HPF)	Year of onset	Initial diagnoses	Initial treatment	Recurrence, DFT (mo)	Disease status	Follow-up (mo)
1	60	M	Tonsil	5.0	Low	< 1	2002	Granuloma	Surg + RT		NED	86
2	35	F	Parapharyn-geal space	5.0	High	10	2003	NPC	Surg	LR, 2	DOD	12
3	63	M	Infratem-poral fossa	4.0	Low	1	2003	PNET	Surg + RT + ChT		NED	72
4	30	F	Pyform sinus	5.0	High	9	2004	FDC sarcoma	Surg + RT	DM (lung), 25	DOD	25
5	23	M	Mediastinum	8.0	Low	3	2006	MPNST	Surg + RT + ChT	DM (bone), 45	AWD	45
6	45	M	Liver	14.5	Low	< 1	2007	FDC sarcoma	Surg		NED	27
7	36	F	Mesentery	15.0	High	7	2007	Malignant GIST	Surg	DM (liver, ovary), 4	AWD	27
8	28	F	Parapharyn-geal space	6.0	High	3	2008	FDC sarcoma	Surg + RT + ChT	DM (lung), 14	AWD	22
9	55	M	Tonsil	2.0	High	9	2008	FDC sarcoma	Surg + RT	LR, 18	AWD	21

AWD: Alive with disease; ChT: Chemotherapy; DFT: Disease-free time following operation; DM: Distant metastasis; DOD: Died of disease; GIST: Gastrointestinal stromal tumor; HG: Histological grades; LR: Local recurrence; MC: Mitotic counts; MPNST: Malignant nerve sheath tumor; NED: No evidence of disease; NPC: Nasopharyngeal carcinoma; PNET: Primitive neuroepidermal tumor; RT: Radiotherapy; Surg: Surgery; FDC: Follicular dendritic cell.