Diagnosis and differential diagnosis of solid-pseudopapillary tumors of the pancreas by CT and MRI

HU Liang-bo; DU Ying; YANG Quan; LIU An-quan; ZHANG Ao; ZHANG Dong

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Journal of China Clinic Medical Imaging ›› 2007, Vol. 18 ›› Issue (3) : 202-204.

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Diagnosis and differential diagnosis of solid-pseudopapillary tumors of the pancreas by CT and MRI

HU Liang-bo1, DU Ying1, YANG Quan1, LIU An-quan1, ZHANG Ao1, ZHANG Dong2

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Abstract

Objective: To study the CT and MRI features of solid-pseudopapillary tumors of the pancreas(SPTP). Methods: Imaging findings of 13 patients with histopathologically proven SPTP were analyzed retrospectively. CT was performed in 12 patients and MRI in 4 patients. Results: Eleven masses were located in the marginal zone of the pancreas. The SPTP were round or elliptial, while the tumors involving both cystic portions and solid portions. All tumors have clear margins. On CT scans, the tumors were low density. Seven masses showed calcification. All masses were mixed hypo- and hyperintense on T1WI and T2WI in 4 cases, and solid portions of mass showed slightly hypointense on T1WI, and iso- or slightly hyperintense on T2WI; and cystic portions of mass showed hypointense on T1WI, and hyperintense on T2WI. On enhanced CT and MRI scans, solid portions showed marked enhancement and cystic portions showed no enhancement. The most marked density contrast between lesions and normal tissue showed on arterial phase, and the contrast of the lesions were equal to the normal tissue on portal vein and balancing phase. Conclusion: There are some characteristics on CT and MRI manifestation of SPTP. The correct imging diagnosis and differential diagnosis is possible based on clinical characteristic and CT or MRI findings.

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pancreatic neoplasms / tomography / X-ray computed / magnetic resonance imaging

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HU Liang-bo;DU Ying;YANG Quan;LIU An-quan;ZHANG Ao;ZHANG Dong. Diagnosis and differential diagnosis of solid-pseudopapillary tumors of the pancreas by CT and MRI[J]. Journal of China Clinic Medical Imaging. 2007, 18(3): 202-204