Korean J Pathol.  2012 Aug;46(4):399-406. 10.4132/KoreanJPathol.2012.46.4.399.

Endoscopic Ultrasound-Guided Fine Needle Aspiration Cytology Diagnosis of Solid Pseudopapillary Neoplasm: Three Case Reports with Review of Literature

• Song JS
• Yoo CW
• Kwon Y
• Hong EK

• KMID: 1439886
• DOI: http://doi.org/10.4132/KoreanJPathol.2012.46.4.399

Abstract

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.

Keyword

Solid pseudopapillary neoplasm; Endoscopic ultrasound-guided fine needle aspiration; Cytology

MeSH Terms

Biopsy, Fine-Needle
Diagnostic Errors
Endoscopic Ultrasound-Guided Fine Needle Aspiration
Female
Humans
Male
Pancreas