Primary Synovial Sarcoma (SS) of the digestive system: a molecular and clinicopathological study of fifteen cases

Table 2 Morphological features of 15 synovial sarcomas of the digestive system

Case #	Type	Mitoses	Necrosis	Grading	Involvement of
					Perivisceral soft tissue	Peritoneum	Adjacent organ
1	M	7	1	2	None	None	None
2	PD	11	1	2	Adventitial tissue	Yes	None
3	M	6	0	2	None	None	None
4	M	P	P	P	Adventitial tissue	Yes	Pancreas
5	M	12	1	2	Adventitial tissue	Yes	Pancreas
6	M	P	P	P	None	None	None
7	B	27	1	3	None	None	None
8	M	14	1	2	None	None	None
9	M	8	2	3	Stomach, duodenum and liver	Yes	None
10	M	5	1	2	None	None	None
11	M	13	1	2	Perivisceral adipose tissue	None	None
12	PD	P	P	P	Perirectal adipose tissue	None	None
13	PD	P	P	P	None	None	None
14	M	4	1	2	None	None	None
15	M	P	P	P	None	None	None

Legend: M: monophasic, B: biphasic, PD: poorly differentiated, mitoses are per 10 HPF, P: pretreated. Necrosis is reported as: 0 for no necrosis, 1 for <50% tumor necrosis, 2 for ≥ 50% tumor necrosis.

ISSN: 2045-3329