Solid Pseudopapillary Neoplasm of the Pancreas: Clinicopathologic Feature, Risk Factors of Malignancy, and Survival Analysis of 53 Cases from a Single Center

Table 1

Clinical characteristics of SPN patients.

Parameter	Patient number ()	%
Age (year, average)	35.4
Gender
Female	46	86.8%
Male	8	13.2%
BMI (average)	23.7
Hepatitis type
Hepatitis B virus	8	15.1%
Hepatitis C virus	2	3.8%
Clinical presentation
Abdominal pain	20	37.7%
Abdominal distention	9	20.0%
Abdominal mass	16	30.2%
Incidental detection	21	39.6%
Nausea and vomiting	6	11.3%
Back pain	3	5.7%
Hematuria	1	1.9%
Component of tumor
Solid and cystic	18	34.0%
Solid	25	47.2%
Cystic	10	18.9%
Calcification	15	28.3%
Dilated main pancreatic duct	3	5.7%
Tumor location
Head	15	28.3%
Body	32	60.4%
Neck	5	9.4%
Extrapancreatic site	1	1.8%
Tumor size (cm)	6.4
Operation type
Pancreaticoduodenectomy	6	11.3%
Pylorus-preserving pancreaticoduodenectomy	3	5.7%
Duodenum-preserving pancreatic head resection	3	5.7%
Middle pancreatectomy	2	3.8%
Distal pancreatectomy with preserving-spleen	15	28.3%
Distal pancreatectomy with splenectomy	13	24.5%
Enucleation	10	18.9%
Palliative operation	1	1.9%
Surgical period (hour average)	3.9
Postsurgical complications
Pancreatic fistula	9	17.0%
Intra-abdominal abscess	4	7.5%
Gastric fistula	1	1.9%
Capsule pattern
Complete capsule	45	84.9%
Incomplete capsule	8	15.1%
Benign tumor	43	81.1%
Malignant tumor	10	18.9%
Vascular infiltration	1
Pancreatic parenchymal invasion	4
Adjacent organ invasion	4
Perineural invasion	1