Pancreatic Polypeptide-Secreting Tumour of the Proximal Pancreas (PPoma)—Ultra Rare Pancreatic Tumour: Clinically Malign, Histologically Benign
Open Access
- 23 August 2019
- Vol. 55 (9), 523
- https://doi.org/10.3390/medicina55090523
Abstract
Background and objectives: Here we report a rare case of a pancreatic polypeptide-secreting tumour (PPoma) discovered by accident during an autopsy. These PPomas occur in less than 2% of all pancreatic neoplasms and are almost exclusively silent, i.e., they are non-functional. Symptoms arising from PPoma are due to its compression of surrounding tissue. Materials and methods: The autopsy was performed on a 68-year-old male diagnosed with multiple endocrine neoplasm type 1 (MEN1) due to the patient’s sudden death. Results: A solitary, densely fibrotic, pink-brown tumour, 18 mm in size tumorous mass, was localised in the head of the pancreas. Microscopically, the tumour had a glandular structure with a tubuloacinar arrangement of the cells. Immunohistochemically, we detected strong PP (pancreatic polypeptide) intracytoplasmic activity and negative glucagon activity. The PPoma was located in the head of the pancreas, likely resulting in the obstruction of the main pancreatic and common bile duct. Conclusions: To the best of our knowledge, this is the first report suggesting the association of PPomas with MEN1. Also, the PPoma could be the cause of acute hemorrhagic pancreatitis due to its location.Keywords
Funding Information
- Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja (172061, 175091)
This publication has 7 references indexed in Scilit:
- PPoma Review: Epidemiology, Aetiopathogenesis, Prognosis and TreatmentDiseases, 2018
- Epidemiology, diagnosis, surgical treatment and prognosis of the pancreatic neuroendocrine tumors: Report of 125 patients from one single centerIndian Journal of Cancer, 2015
- Prognostic Factors in Pancreatic Endocrine Neoplasms: An Analysis of 136 Cases With a Proposal for Low-Grade and Intermediate-Grade GroupsJournal of Clinical Oncology, 2002
- Pancreatic Endocrine TumorsPathology - Research and Practice, 1988
- Occurrence of human pancreatic polypeptide in pancreatic endocrine tumors. Possible implication in the watery diarrhea syndrome.1976
- Mixed endocrine pancreatic tumors producing several peptide hormones.1975
- Neural crest origin of the endocrine polypeptide (APUD) cells of the gastrointestinal tract and pancreasGut, 1971