ObjectiveTo analyze the CT features of solid pseudopapillary tumor of pancreas (SPTP). MethodsEight patients with SPTP received triple phasic contrast-enhanced CT, and its consistency with pathological findings was analyzed. ResultsSPTP manifested as a solitary and exogenous mass, with a heterogeneous pattern composed of solid and polycystic parts. The shape of SPTP was spherical in four patients, oval in two patients, and shallow lobulation in another two patients. In contrast-enhanced phase images, the solid parts showed mild to moderate enhancement in both arterial and portal phases. Complete capsule was showed in seven patients, and nodules were found in the wall of mass in five patients. Hemorrhage was seen in two patients and calcification was showed in five patients. The dilation of pancreatic duct was found in one patient, liver metastases was showed in one patient, and the invasion of tumor to posterior gastric wall was found in one patient. Pseudopapillary structure, hemorrhage, necrosis, and cystic degeneration were showed in all patients by histological study. ConclusionSPTP has certain characteristic CT imaging manifestations consistent with histological features, which is helpful for the diagnosis and differential diagnosis of SPTP.
ObjectiveTo investigate the imaging findings of carcinoma of body and tail of the pancreas. MethodsTotally twentythree patients with carcinoma of body and tail of the pancreas were studied. The diagnosis was proven by surgery and pathological findings. The imaging features of twentythree cases were reviewed including the location, size, shape, texture, and enhancement patterns of the tumor masses. Five cases underwent enhanced MRI examination, 18 cases underwent enhanced spiral CT examination. ResultsThe tumors located in the pancreatic body in 5 cases, located in the tail in 7 cases, and located in the body and tail of pancreas in 11 cases. The tumor masses were irregular in shape and heterogeneously hypointense from CT scan. From MR, the masses were slightly hypointense on T1WI, and slightly or mixed hyperintense on T2WI. Nineteen cases showed heterogeneous slight enhancement and four cases had no enhancement. The tumors were well demarcated in five cases, while those were poorly defined in the other 18 cases. Metastatic lymphadenopathy was shown in 16 cases, vascular invasion in 8 cases, and metastatic lesions of other organs in 3 cases. ConclusionThe carcinoma of body and tail of the pancreas shows certain characteristic imaging. CT and MRI examination can reflect the morphologic features, the hemodynamic alterations, and the involvement of adjacent structures and organs.
ObjectiveTo investigate the imaging features of insulinoma on multi-slice spiral CT (MSCT) and magnetic resonance imaging (MRI) with correlation of pathology. MethodsAll images of 8 patients confirmed by surgery and pathology were retrospectively analyzed with correlation of pathology. MSCT scans were performed in 4 patients and MR scans in 6 patients, among which 2 patients accepted both MSCT and MRI examinations. ResultsInsulinoma in all patients manifested as solitary lesions with diameters of 0.5-3.5 cm. Four lesions demonstrated isodensity or hypodensity on plain MSCT, with significant enhancement on arterial phase, and relative isodensity or slight hyperdensity on portal phase and delay phase. On plain MRI, lesions demonstrated hyperintensity on T1WI, slight hyperintensity or hyperintensity on T2WI. The enhanced patterns of insulinoma were similar to the findings on MSCT. ConclusionsThe imaging characteristics of insulinoma reflect the pathological features. MSCT and MRI are effective in the diagnosis of inslinoma, and MRI can show more diagnostic information.