Case of Cytomorphological Diagnosis of Pancreatic Schwannoma

Abstract

Background: Schwannoma is an extremely rare non-epithelial tumor of the pancreas. Less than 50 cases of pancreatic schwannoma have been described in the literature over the past thirty years and only few cases report has described its findings on Fine-Needle Aspiration (FNA). Preoperative diagnosis of pancreatic schwannoma can be particularly challenging. Pancreatic schwannomas may mimic other, more common pancreatic lesions, such as cystic neoplasms, solid neoplasms, neuroendocrine tumors. Cytomorphological verification of the diagnosis is difficult due to the similarity of Schwannomas with other non-epithelial tumors from spindle cells. Therefore, pancreatic schwannomas have a very high rate of misdiagnosis. Objective: demonstration preoperative diagnosis and treatment of a rare pancreatic tumor. Materials and methods: Here we present a case of preoperative cytomorphological diagnosis of pancreatic schwannoma in a 58-year-old man. During magnetic resonance imaging, computed tomography and endosonography (EUS), the patient was diagnosed the tumor in the head of the pancreas with a diameter of up to 7 cm. For morphological verification of the process, a fine needle aspiration puncture of the formation was performed under EUS control. Diagnosis of pancreatic schwannoma was established by cytomorphological examination of cell block material using immunocytochemical method. Conclusion: the analysis of the result of cytomorphological diagnosis of pancreatic schwannoma is presented.