TABLE 1.

Clinicopathologic Characteristics of Patients With Oncocytic Intraductal Papillary Mucinous Neoplasms

Case	Age, y	Sex	Location	Imaging Modality	Size on Imaging, cm	Additional Radiologic Findings	Radiologic Diagnosis	Cytologic Diagnosis	Histologic Diagnosis	Size of Invasion, cm	Follow-Up
1	57	Man	Head	MRI	6.6	Mass communicates with  pancreatic duct (7.5 mm)	Cystic and solid  mass PDAC	PDAC with  intraductal  component	IOPN, 6.5 cm; negative  margins	None identified	ANED at  38 mo
2	56	Woman	Head	CT	5.6	Cystic mass in main and branch  PDs with papillary projections  and dilatation of PD to 3.3 cm	MD-IPMN with  invasive  component	IPMN vs  cystic  PDAC	IOPN, 8.7 cm, with minute focus  of PDAC; margin positive  for IPMN, LNs negative,  confined to pancreas	0.3 with focal extravasated mucin	ANED at  15 mo
3	68	Woman	Head	CT	4.3	Cystic mass in pancreatic head  with pancreatic duct dilatation  to 7 mm	Cystic mass	IOPN, with  high-grade  atypia	IPMN, 3.3 cm, with high-grade  dysplasia/carcinoma in situ;  negative margins and LNs	None	LTF/U
4	84	Man	Head	MRI	2.5	Dilated CBD 7 mm and pancreatic  duct 6 mm; thickened septae  and thick fluid observed	Mucinous cyst:  MCN vs IPMN	IOPN	IOPN, 2.2 cm, minute focus  suspicious for PDAC;  negative margins, LNs	0.1	Perioperative  death, 23 d  postsurgery
5	64	Woman	Body	MRI	3.7	Solid, circumscribed mass with  central cystic component; PD  dilated to 6 mm	PDAC	IOPN, with  high-grade  atypia,  suspicious  for invasion	IOPN, 4.5 cm, multifocal PDAC;  negative margins, 5 of 17 LNs  positive	<2 cm aggregate microscopic measurement	ANED at 9 mo,  receiving  chemotherapy

Abbreviations: ANED, alive with no evidence of disease; CBD, common bile duct; CT, computerized tomography scan; IOPN, intraductal oncocytic papillary neoplasm; LNs, lymph nodes; LTF/U, lost to follow-up; MCN, mucinous cystic neoplasm; MD-IPMN, main duct-intraductal papillary mucinous neoplasm; MRI, magnetic resonance imaging; PD, pancreatic duct; PDAC, pancreatic ductal adenocarcinoma.