Solid and cystic papillary neoplasm of pancreas: A clinic-pathological and immunohistochemical study: A tertiary care center experience. 2013

Rashmi Patnayak, and Amitabh Jena, and Sriram Parthasarathy, and Bodagala Vijaylaxmi, and Amancharla Y Lakshmi, and Nandyala Rukmangadha, and Amit K Chowhan, and Bobbit V Phaneendra, and Mandyam K Reddy
Department of Pathology, Sri Venkateswar Institute of Medical Sciences, Tirupati, Andhra Pradesh, India.

BACKGROUND Solid pseudopapillary tumor of the pancreas (SPT) is a rare tumor of low malignant potential, mostly described in young women. METHODS In this retrospective study from January 2000 - December 2010, there were 50 pancreatic tumors. In this period, four SPTs were encountered, which were analyzed with respect to clinical, imaging, histopathological, and immunohistochemical findings. RESULTS There was a female preponderance with mean age of 22.2 years. Two of the tumors were located in head of the pancreas and two in the body and tail region. On imaging, majority were large cystic tumors. Histopathologically, they exhibited extensive necrosis and presence of pseudo papillae in viable areas. Immunohistochemically, they were positive for alpha-1-anti-trypsin, alpha-1-anti-chymotrypsin, vimentin, CD10, and CD99. Progesterone receptor and p53 exhibited mild positivity in all of the four cases, whereas neuron specific enolase (NSE), synaptophysin, and chromogranin showed focal positivity in one case. CONCLUSIONS Despite its non-specific clinical, imaging, and even immunohistochemical features, characteristic gross and microscopic findings provide reliable diagnosis of SPTs.

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