Objective:

To analyze the computed tomography (CT) and pathology features of gastric stromal tumor (GST) and small intestinal stromal tumor (SIST) under multi-slice s

piral CT (MSCT).

Methods:

The clinical data of 117 patients with gastrointestinal stromal tumors (GIST) in Jiangsu Binhai peoples hospital from September 2016 to September 2019 were collected. Patients were divided into GST group (83 cases) and SIST group (34 cases) according to the location of GIST. The CT and pathological features of the two groups were compared and analyzed.

Results:

The main clinical manifestations of 83 GST patients before operation were abdominal pain

abdominal distension

and some patients had black stool or hematochezia

including 55 cases of primary gastric fundus

26 cases of gastric body

and 2 cases of gastric antrum. At the same time

34 cases of sist patients mainly manifested as black stool or hematochezia

stool occult blood test positive

and some patients had abdominal pain

abdominal distension

etc.

including 7 cases of primary duodenum

21 cases of jejunum

6 cases of ileum. The proportion of tumor diameter ＜2 cm in GST group was significantly higher than that in SIS Group ［48.2% (40/83)

vs

20.6% (7/34)

2

=7.647

P

=0.006］. Tumor internal condition

necrosis or calcification between the two groups were no significant differences (

P

＜0.05)

but tumor morphology and growth pattern showed significant differences (

P

＞0.05). In GST group

the enhancement scan of arterial phase

venous phase and delayed phase showed gradual enhancement

while in SIS group

the enhancement scan of arterial phase showed fast rising- slowly decreasing enhancement. The CT values of MSCT plain scan and three-phase contrast-enhanced imaging in SIS group were significantly higher than those in GST group (

P

＜0.05). The positive rate of CD34 in GST group was significantly higher than that in SIST group (

P

＜0.05)

and there were no statistical differences in other immunohistochemical indexes (

P

＞0.05). The proportion ofhigh-risk patients in pathological risk grading in SIST group was significant

ly higher than that in GST group (

P

＜0.05).

Conclusion:

CT findings and pathological characteristics between GST and SIST were some differences.