Application Value of CT and MRI in Diagnosis of Ewing’s Sarcoma/Primitive
Neuroectodermal Tumor: A Case Report and Literature Review
HAN Xu1,2, ZHANG Wan-shi3,
SUN Mei-yu2
1.Department of Graduate School, Dalian
Medical University, Dalian Liaoning 116044,
China; 2.Department of Radiology, the
First Affiliated Hospital of Dalian Medical
University, Dalian Liaoning 116011, China;
3.Department of MRI, Air Force General
Hospital, Beijing 100142, China
Abstract：Objective To investigate CT and MRI features, diagnosis and antidiastole of Ewing’s
Sarcoma/primitive neuroectodermal tumor (ES/PNET) in small intestine. Methods Analysis CT and
MR imaging feature, with pathology and immunohistochemistry of 1 case of small intestinal ES/PNET
patient and review of the literature. Results A 15-year-old female patient with two-year history anemia
and intermittent hematochezia for 1 month. CT scan revealed the presence of a large soft tissue mass
in right lower abdomen, the mass was heterogeneous. A contrast enhanced CT scan demonstrated that
the solid components of the mass were obvious enhanced. The MRI scan revealed that a heterogeneous
mass arose in right lower abdomen-vesicouterine pouch, which presented isointensity on both T1-weight
image and T2-weight images. The enhancement pattern of the mass was similar in MRI with that of CT
scans. The pathology diagnosis was altered to intestine malignant small round cell tumor with blood
sinus, areas of hemorrhage and cyst formation can be seen, the cells were diffuse and arranged in nests.
Immunohistochemical tests were performed, the results were as follows: positive expression for CD99,
VIM, Syn, EMA, PR and CAM5.2. Conclusion Small intestine ES/PNET is a rare small round and highgrade
cell malignant tumors. The imaging feature are non-specific in CT and MRI, but the mass can be
located accurately and described the size, shape and density. It also can confirm the signs of malignancy
and whether there is a distant metastasis. It provides a great deal of valuable information for preoperative
diagnosis and surgical planning.
韩旭1,2，张挽时3，孙美玉2. CT及MRI在诊断小肠原发尤文肉瘤/原始神经外胚层肿瘤中的价值一例并文献回顾[J]. 中国医疗设备, 2017, 32(5): 80-83.
HAN Xu1,2, ZHANG Wan-shi3,
SUN Mei-yu2. Application Value of CT and MRI in Diagnosis of Ewing’s Sarcoma/Primitive
Neuroectodermal Tumor: A Case Report and Literature Review. China Medical Devices, 2017, 32(5): 80-83.
