National trends in resection of the distal pancreas

Table 1 International classification of diseases, ninth revision, and current procedural terminology codes used

ICD-9 codes	Description
Diagnosis
Malignant neoplasms
157.1	Body of pancreas
157.2	Tail of pancreas
157.3	Pancreas duct (Santorini and Wirsung)
157.4	Islets of Langerhans
157.8	Other specified sites of the pancreas (ectopic pancreatic tissue, malignant neoplasms of contiguous or overlapping sites of pancreas)
157.9	Pancreas, part unspecified
Benign neoplasms
211.6	Benign neoplasms of pancreas except Langerhans
211.7	Benign neoplasm of islets of Langerhans
Procedure
52.5	Partial pancreatectomy
52.52	Distal pancreatectomy
52.53	Radical subtotal pancreatectomy
52.59	Other partial pancreatectomy
54.21	Laparoscopy utilization
CPT codes
48140	Pancreatectomy, distal subtotal, with or without splenectomy; without pancreaticojejunostomy
48145	Pancreatectomy, distal subtotal, with or without splenectomy; with pancreaticojejunostomy
48999	Unlisted procedure
49320	Exploratory laparoscopy
ICD-O-3 codes
25.1	Body of the pancreas
25.2	Tail of the pancreas
SEER codes
30	Partial pancreatectomy, NOS (distal pancreatectomy)
80	Pancreatectomy, NOS
90	Surgery, NOS

ICD-9: International Classification of Diseases, ninth revision; CPT: Current procedural terminology; ICD-O-3: International Classification of Diseases for Oncology, third edition; SEER: Surveillance Epidemiology and End Results; NOS: Not otherwise specified.

Table 2 Number of patients and lymph nodes resected per year from 2003 to 2008 (Surveillance Epidemiology and End Results database)

Year	Number of lymph nodes resected				Lymph node ratio in N1 disease
	n	Median	1QR	3QR	n	Median	1QR	3QR
2003	88	8	2	14	31	0.27	0.14	0.50
2004	133	7	4	13	66	0.23	0.13	0.50
2005	133	7	3	14	62	0.23	0.10	0.50
2006	160	8	5	13	71	0.21	0.14	0.45
2007	179	8	4	15	85	0.25	0.13	0.36
2008	315	9	5	16	94	0.21	0.13	0.40

QR: Quartile range.