Jei Hee Lee MD, Presenter: Nothing to Disclose

Young Keun Sur MD, Abstract Co-Author: Nothing to Disclose

Seon Young Park MD, Abstract Co-Author: Nothing to Disclose

Jai Keun Kim MD, Abstract Co-Author: Nothing to Disclose

Young Chul Kim MD, Abstract Co-Author: Nothing to Disclose

To evaluate and describe the imaging features of solid pseudopapillary tumors (SPT) in male patients and to compare with the imaging features of SPTs in female patients.

This retrospective study was approved by the institutional review board. We included 50 patients (M:F=8:42, mean age=36.4 years) who had undergone preoperative MR evaluation and were histologically confirmed as SPT. The following MR imaging features of SPT in each patient were reviewed: size, location, shape, margin, encapsulation, hemorrhage, calcification, solid-cystic ratio, P-duct dilatation, parenchymal atrophy, T1 signal intensity, T2 signal intensity, and enhancement pattern. Statistical differences of MR imaging features between male and female SPT patients were analyzed.

The average age of male patients (50.75 ± 4.13 years) was significantly higher (p=0.0013) than female patients (33.67 ± 2.03 years). The shape of SPTs in male patients was predominantly lobulated (n=6/8, 75.0%) compared to female patients in whom oval shaped SPTs were most prevalent (n=26/42, 61.91%) (p=0.0224). SPTs in male patients were predominantly solid (solid, n=4/8, 50.0%; mainly solid, n=4/8, 50.0%) whereas cystic (n=5/42, 11.90%) or mainly cystic (n=13/42, 30.95%) lesions were significantly more prevalent in female patients (p=0.0309). Progressive heterogeneous enhancement was the most prevalent enhancement pattern of SPTs in both male (n=7/7, 100.0%) and female (n= 32/37, 86.49%) patients. Other MR imaging features showed no significant difference between male and female patients.

In conclusion, SPTs in male patients appeared as mainly solid mass with lobulating contour and heterogeneous progressive enhancement occurring at an older age than female patients. Recognition of such different imaging features of SPTs in male patients may help to differentiate from other pancreatic tumors for proper management.

SPT in male patients occurred at an older age and appeared as solid mass with lobulating contour compared to female patients.

Lee, J, Sur, Y, Park, S, Kim, J, Kim, Y, MR Imaging Features of Solid Pseudopapillary Tumors of Pancreas in Male Patients: Comparison with Imaging Features in Female Patients.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14017723.html