Vol.46, No.4:399-406, August 2012 Case reports Endoscopic Ultrasound-Guided Fine Needle Aspiration Cytology Diagnosis of Solid Pseudopapillary Neoplasm: Three Case Reports with Review of Literature Joon Seon Song1,2ㆍChong Woo Yoo1ㆍYoungmee Kwon1ㆍEun Kyung Hong1 1Department of Pathology, Center for Liver Cancer, National Cancer Center, Goyang; 2Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea Solid pseudopapillary neoplasm of the pancreas (SPN) is relatively rare and it occurs almost exclusively in women. We recently experienced three cases of SPN diagnosed by endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA). These three cases were two male and one female patient whose age was 29, 37, and 44 years old. Radiological diagnosis was pancreatic endocrine tumor (PEN) showing solid with a heterogenous echogenicity. EUS-FNA cytology specimens consisted of single cells and aggregates of uniform cells, forming microadenoid structures, branching, papillary clusters with delicate fibrovascular cores. In conclusion, a single diagnosis of SPN based on clinical and radiological findings would be risky because there is a possibility of it being misdiagnosed as PEN or other malignancies. An EUS-FNA is therefore essential for establishing the diagnosis. In addition, the pathologists should recognize the characteristic cytologic findings with immunoprofiles of SPN to prevent misdiagnosis of SPN. Key Words : Solid pseudopapillary neoplasm; Endoscopic ultrasound-guided fine needle aspiration; Cytology

Copyright(c) 2008 By the Korean Society of Pathologists & the Korean Society for Cytopathology
Room 1209 Gwanghwamun Officia, 163 Sinmunno 1-ga, Jongno-gu, Seoul 110-999, Korea
Tel: +82-2-795-3803, 3094, Fax: +82-2-790-6635, E-mail: kjpath@kams.or.kr.
#406 Lilla Swami Bldg, 391-18, Yangjae-dong, Seocho-gu, Seoul 137-130, Korea
Tel: +82-2-593-6943 Fax: +82-2-593-6944, E-mail: cytopathology@hanmail.net