Objective:

To explore the CT and pathological features of intestinal inflammatory myofibroblastic tumor (IMT).

Methods:

The CT features of 5 cases pathologically confirmed IMT were retrospectively reviewed

and compared with the pathological features. Preoperative CT examination was performed in all 5 patients

including 2 patients who underwent plain abdominal scan and enhanced abdominal scan

and 3 patients who underwent only enhanced abdominal scan

.

Results:

There were 1 male and 4 female patients

aged 43~67 years

with an average age of 56 years. The tumor was located in rectum (

n

=1)

small intestine (

n

=2)

cecum (

n

=2). One case was cystic and solid with exophytic growth

the solid components showed moderate enhancement

and the lesions were accompanied by flaky low-density shadow and marginal line-like calcification shadow. There were 2 cases of solid mass in the lumen of the intestinal tract

which presented obvious non-uniform enhancement

and the enhancement shadow of small blood vessels could be seen in it

among which 1 case had metastasis. The lesions in 2 cases were solid masses growing outside the lumen of the intestinal tract

and the enhanced scan showed progressive and delayed obvious enhancement

local nodular enhancement and ring enhancement. The lesions in these 2 cases were accompanied by focal sarcomatoid lesions. Histologically

the tumors consisted of proliferating spindle myofibroblast and fibroblast cells

accompanied by variable infiltration of interstitial inflammatory cells. Immunohistochemistry showed that the percentage of positive staining for smooth muscle actin(SMA)

vimentin was 80%

60%

respectively.

Conclusion:

Intestinal IMT is a very rare tumor

and its imaging features can reflect pathological characteristics

to some extent

and which is helpful for the diagnosis of this disease.