A rectal gastrointestinal stromal tumor case accompanied by elevated CEA mimicking rectal carcinoma on 18F-FDG PET/CT

被引:0
|
作者
Tao, Zihao [1 ]
Wu, Sitong [1 ]
Chen, Zhao [1 ]
Qiu, Yongkang [1 ]
Song, Lele [1 ]
Yang, Qi [1 ]
Nong, Lin [2 ]
Kang, Lei [1 ]
机构
[1] Peking Univ First Hosp, Dept Nucl Med, Beijing 100034, Peoples R China
[2] Peking Univ First Hosp, Dept Pathol, Beijing 100034, Peoples R China
来源
AMERICAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING | 2023年 / 13卷 / 01期
关键词
Gastrointestinal stromal tumor; GIST; rectum; F-18-FDG; PET/CT; case report; POSITRON-EMISSION-TOMOGRAPHY; COMPUTED-TOMOGRAPHY; IMATINIB MESYLATE; FDG-PET; GIST; THERAPY;
D O I
暂无
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal neoplasm arising from gastrointestinal tract and can be benign or malignant. Rectal GISTs are rare and have poor prognosis. We here reported an older male who presented with features of distending discomfort in the rectum and pain in the anus due to a large rectal tumor. Physical examinations detected a mass in the rectum without blood staining on the gloved finger. Carcinoembryonic antigen (CEA) was found to be slightly elevated and the prostate-specific antigen level was normal. F-18-FDG PET/CT showed a soft tissue density mass at the bottom of the pelvic, with an unclear boundary to the surroundings with the significantly increased FDG uptake (SUVmax 17.5). Although a rectal carcinoma was suspected based on the finding of PET/CT and CEA, the histopathological examination confirmed the diagnosis of the malignant GIST of the rectum. The patient was then treated with imatinib and on follow-up regularly. In this case, F-18-FDG PET/CT shows the advantage of visualizing both primary and metastatic lesions and provides valuable information for the diagnosis, staging, evaluation, and prognosis of GIST.
引用
收藏
页码:26 / 32
页数:7
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