Young Keun Sur1, Jei Hee Lee2, Jai Keun Kim1, Min Jung Park1, Bohyun Kim1, Mi-Suk Park3, Jin-Young Choi3, Young Bae Kim4, Dakeun Lee4. 1. Department of Radiology, Ajou University School of Medicine, Suwon, Republic of Korea. 2. Department of Radiology, Ajou University School of Medicine, Suwon, Republic of Korea. Electronic address: radljh@ajou.ac.kr. 3. Department of Radiology, Yonsei University College of Medicine, Seoul, Republic of Korea. 4. Department of Pathology, Ajou University School of Medicine, Republic of Korea.
Abstract
PURPOSE: To evaluate MR imaging features of solid pseudopapillary neoplasms (SPN) in male patients and to compare them with the MR imaging features in female patients. MATERIALS AND METHODS: Fifty patients who were histologically confirmed as SPN (M:F=8:42, mean age=36.4 years) with preoperative MRI were included. The following imaging features were reviewed: size, location, shape, margin, encapsulation, solid-cystic ratio, pancreatic duct dilatation, parenchymal atrophy, T1 signal intensity, T2 signal intensity, and morphological and dynamic pattern of enhancement. The statistical differences between male and female patients were analyzed. RESULTS: The average age of male patients (50.8 ± 4.1 years) was significantly higher (p<0.01) than female patients (33.7 ± 2.0 years). The shape of SPN in male patients was predominantly lobulated (n=6/8, 75.0%) compared to female patients, in whom oval shaped SPN was most prevalent (n=26/42, 61.91%) (P=0.02). SPN in male patients contained less cystic component (solid, n=4/8, 50.0%; mainly solid, n=4/8, 50.0%) while cystic (n=5/42, 11.90%) or mainly cystic (n=13/42, 30.95%) lesions were significantly more prevalent in female patients (P=0.03). The majority of SPNs in both groups showed progressive heterogeneous enhancement pattern. Other MR imaging features showed no significant differences between the male and female patients. CONCLUSION: On MRI, SPN in male patients appeared as mainly solid mass with a lobulating contour and heterogeneous progressive enhancement occurring at an older age than female patients. Recognition of imaging features of SPN in male patients compared to typical SPN in female patients should assist in correct differentiation of SPN from other pancreatic tumors.
PURPOSE: To evaluate MR imaging features of solid pseudopapillary neoplasms (SPN) in male patients and to compare them with the MR imaging features in female patients. MATERIALS AND METHODS: Fifty patients who were histologically confirmed as SPN (M:F=8:42, mean age=36.4 years) with preoperative MRI were included. The following imaging features were reviewed: size, location, shape, margin, encapsulation, solid-cystic ratio, pancreatic duct dilatation, parenchymal atrophy, T1 signal intensity, T2 signal intensity, and morphological and dynamic pattern of enhancement. The statistical differences between male and female patients were analyzed. RESULTS: The average age of male patients (50.8 ± 4.1 years) was significantly higher (p<0.01) than female patients (33.7 ± 2.0 years). The shape of SPN in male patients was predominantly lobulated (n=6/8, 75.0%) compared to female patients, in whom oval shaped SPN was most prevalent (n=26/42, 61.91%) (P=0.02). SPN in male patients contained less cystic component (solid, n=4/8, 50.0%; mainly solid, n=4/8, 50.0%) while cystic (n=5/42, 11.90%) or mainly cystic (n=13/42, 30.95%) lesions were significantly more prevalent in female patients (P=0.03). The majority of SPNs in both groups showed progressive heterogeneous enhancement pattern. Other MR imaging features showed no significant differences between the male and female patients. CONCLUSION: On MRI, SPN in male patients appeared as mainly solid mass with a lobulating contour and heterogeneous progressive enhancement occurring at an older age than female patients. Recognition of imaging features of SPN in male patients compared to typical SPN in female patients should assist in correct differentiation of SPN from other pancreatic tumors.
Authors: Mohammad Abudalou; Eduardo A Vega; Rohit Dhingra; Erik Holzwanger; Sandeep Krishnan; Svetlana Kondratiev; Ali Niakosari; Claudius Conrad; Christopher G Stallwood Journal: World J Clin Cases Date: 2021-03-06 Impact factor: 1.337