Table I.

Baseline patient and tumor characteristics at diagnosis.

Baseline parameters	No. (%)a
Patients	21 (100.0)
Median age at diagnosis, years (range)	67.2 (31.4-87)
Sex
Male	16 (76.2)
Female	5 (23.8)
Primary GIST location
Esophagus	3 (14.3)
Stomach	6 (28.6)
Small intestine	8 (38.1)
Colon	2 (9.5)
Peritoneum	2 (9.5)
Median time to metastasis, months (range)	0 (0-64)
Synchronous metastasis at initial diagnosis of GIST	12 (57.1)
Synchronous liver metastasis at initial diagnosis of GIST	7 (33.3)
Primary molecular pathology
c-KIT exon 11 mutation	8 (38.1)
c-KIT exon 9 mutation	4 (19.0)
c-KIT wild-type	1 (4.8)
Not available	8 (38.1)

^aUnless otherwise indicated. GIST, gastrointestinal stromal tumors.