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Case ReportOpen Access
Inflammatory Myofibroblastic Tumor of Abdomen: Computerized Tomographic (CT) and Pathological Findings
Yamrubboon W 
,
Phongkitkarun S ,
Jaovisidha S ,
Sirikulchayanonta V ,
Tapaneeyakorn J ,
Siripornpitak S
,
Phongkitkarun S ,
Jaovisidha S ,
Sirikulchayanonta V ,
Tapaneeyakorn J ,
Siripornpitak S Inflammatory Myofibroblastic Tumor (IMT) is the recent name of Inflammatory pseudotumor which
was in intermediate group of fibrous-origin tumor. The authors retrospectively reviewed such cases in
Ramathibodi Hospital from January 2001 to December 2005. There were 115 cases of fibrous-origin tumor,
which was IMT in 17 cases. Nine cases occurred in the abdomen and only 3 of these had complete computerized
tomographic (CT) imaging. One was hypodense liver mass with thick rim enhancement. Another one in the
liver presented as a liver abscess which appeared as multiloculated hypodense mass with enhanced septum.
The third case was a large malignant-looking retroperitoneal mass and having a small accompanying hepatic
lesion which rapidly grew in the follow up study at nine months.
IMT in the abdomen was scanty. The diagnosis was done with difficulty because of different signs and
symptoms such as fever and palpable abdominal mass. The laboratory findings were nonspecific or within
normal limits. Tissue biopsy was the way of definite diagnosis. We reported 3 cases of abdominal IMT with
variable imaging findings that may lead to inappropriate treatment. Recognization of such findings will help
achieve correct diagnosis.
Keywords: Inflammatory myofibroblastic tumor, Inflammatory pseudotumor, Liver, Retroperitoneum,
Computerized tomography
was in intermediate group of fibrous-origin tumor. The authors retrospectively reviewed such cases in
Ramathibodi Hospital from January 2001 to December 2005. There were 115 cases of fibrous-origin tumor,
which was IMT in 17 cases. Nine cases occurred in the abdomen and only 3 of these had complete computerized
tomographic (CT) imaging. One was hypodense liver mass with thick rim enhancement. Another one in the
liver presented as a liver abscess which appeared as multiloculated hypodense mass with enhanced septum.
The third case was a large malignant-looking retroperitoneal mass and having a small accompanying hepatic
lesion which rapidly grew in the follow up study at nine months.
IMT in the abdomen was scanty. The diagnosis was done with difficulty because of different signs and
symptoms such as fever and palpable abdominal mass. The laboratory findings were nonspecific or within
normal limits. Tissue biopsy was the way of definite diagnosis. We reported 3 cases of abdominal IMT with
variable imaging findings that may lead to inappropriate treatment. Recognization of such findings will help
achieve correct diagnosis.
Keywords: Inflammatory myofibroblastic tumor, Inflammatory pseudotumor, Liver, Retroperitoneum,
Computerized tomography
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