Background Intraductal papillary mucinous neoplasms (IPMNs) and mucinous cystic neoplasms (MCNs) represent the tumors with malignant transformation potential. The objective of the study was to verify their pathological characteristics, prognoses, and recurrence factors. Methods Two hundred eighteen IPMNs and 27 MCNs resected at a single institution were included. The demographic, preoperative, histopathological, and follow-up data of the patients were recorded and analyzed. Overall survival (OS) and disease-free survival (DFS) were defined as the interval from the date of initial surgery to death or the last follow-up (OS) and to diagnosis of recurrence or death at follow-up (DFS). Results Of the 218 IPMN and 27 MCN patients, 93 (42.7%) and 8 (29.6%) cases were malignant, respectively. IPMNs occurred in older patients compared with MCN patients (median 63 years vs 54 years, P < 0.0001), and MCNs occurred exclusively in females (100%). Of the overall study cohort, the pathological specimens presented peripheral invasion in 37 (15.1%) patients and incisal margin invasion was observed in 46 (18.8%) patients. After a median follow-up of 34 months, 37 (14.9%) patients relapsed. The 5-year OS and DFS rates of IPMNs were 97.5% and 80.6%; and the OS and DFS rates of MCNs were 95.7% and 87.0%, respectively. There were four independent risk factors associated with recurrence: pathological diagnoses with malignancy (odds ratio, OR = 3.65), presence of oncocytic type for IPMN (OR = 1.69), peripheral invasion (OR = 12.87), and incisal margin invasion (OR = 1.99). Conclusions IPMNs and MCNs are indolent tumors with favorable prognoses after surgical resection in terms of their relatively high OS and DFS rate. Patients with malignant pathological-related diagnoses should accept strict tumor surveillance in view of their higher risk of recurrence.

Background: Intraductal papillary mucinous neoplasms (IPMNs) and mucinous cystic neoplasms (MCNs) represent the tumors with malignant transformation potential. The objective of the study was to verify their pathological characteristics, prognoses, and recurrence factors. Methods: 218 IPMNs and 27 MCNs resected at a single institution were included. The demographic, preoperative, histopathological and follow-up data of the patients were recorded and analyzed. Results: Of the 218 IPMN and 27 MCN patients, 93 (42.7%) and 8 (29.6 %) cases were malignant, respectively. IPMNs occurred in older patients compared with MCN patients (median 63 years vs 54 years, P<0.0001) and MCNs occurred exclusively in females (100%). Of the overall study cohort, the pathological specimens presented peripheral invasion in 37 (15.1%) patients and incisal margin invasion was observed in 46 (18.8%) patients. After a median follow-up of 34 months, 37(14.9%) patients relapsed. The 1, 3, 5 -year overall survival rate (OS) and diseases-free survival (DFS) rate for IPMNs were 98.75%, 98.75%, 97.5%, and 85.7%, 81.1%, 80.6%; and for MCNs the rates were 95.7%, 95.7%, 95.7%, and 91.3%%, 87.0%, 87.0%, respectively. There were four independent risk factors associated with recurrence: pathological diagnoses with malignancy (Odds rate, OR=3.65), presence of oncocytic type for IPMN (OR=1.69), peripheral invasion (OR=12.87) and incisal margin invasion (OR=1.99). Conclusions: IPMNs and MCNs are indolent tumors with favorable prognoses after surgical resection in terms of their relatively high OS and DFS rate. Patients with malignant pathological-related diagnoses should accept strict tumor surveillance in view of their higher risk of recurrence.

Background:Desmoid tumor (DT) is a rare neoplasm. It is a benign tumor, but it has the potential to become invasive. The number of reported intra-abdominal DT cases does not exceed 100. The etiology is usually associated with a surgery, with the tumor occurring especially at the surgical margins. Cases induced by trauma have not been reported before. Case presentation:Here we report of a case of a 15-year-old boy who fell and was hit in his abdomen by his bicycle’s handle. He was referred to our unit due to the yellowing of the skin and sclera. We assumed it to be pancreatic adenocarcinoma because he had obstructive jaundice, a high level of the carbohydrate antigen 19-9 and the diagnosis of abdominal magnetic resonance imaging scan, which demonstrated pancreatic cancer.Elective surgery was performed based on a presumptive diagnosis of pancreatic adenocarcinoma. Immunohistochemical analysis on the resected tumor concluded a diagnosis of pancreatic DT. After 48 months of follow up, the patient still shows no sign of recurrence. Conclusion:Based on the reviewed literature, curative resection is the recommended treatment for pancreatic DT, and the rate of recurrence for sporadic pancreatic DT is low.

Background: Intraductal papillary mucinous neoplasms (IPMNs) and mucinous cystic neoplasms (MCNs) represent the tumors with malignant transformation potential. The objective of the study was to verify their pathological characteristics, prognoses, and recurrence factors.Methods: 218 IPMNs and 27 MCNs resected at a single institution were included. The demographic, preoperative, histopathological and follow-up data of the patients were recorded and analyzed. Overall survival (OS) and disease-free survival (DFS) were defined as the interval from the date of initial surgery to death or the last follow up (OS) and to diagnosis of recurrence or death at follow-up (DFS).Results: Of the 218 IPMN and 27 MCN patients, 93 (42.7%) and 8 (29.6 %) cases were malignant, respectively. IPMNs occurred in older patients compared with MCN patients (median 63 years vs 54 years, P<0.0001) and MCNs occurred exclusively in females (100%). Of the overall study cohort, the pathological specimens presented peripheral invasion in 37 (15.1%) patients and incisal margin invasion was observed in 46 (18.8%) patients. After a median follow-up of 34 months, 37(14.9%) patients relapsed. The 5-year OS and DFS rate of IPMNs were 97.5% and 80.6%; and the OS and DFS rates of MCNs were 95.7% and 87.0%, respectively. There were four independent risk factors associated with recurrence: pathological diagnoses with malignancy (Odds ratio, OR=3.65), presence of oncocytic type for IPMN (OR=1.69), peripheral invasion (OR=12.87) and incisal margin invasion (OR=1.99).Conclusions: IPMNs and MCNs are indolent tumors with favorable prognoses after surgical resection in terms of their relatively high OS and DFS rate. Patients with malignant pathological-related diagnoses should accept strict tumor surveillance in view of their higher risk of recurrence.