Value of ultrasound examination in differential diagnosis of pancreatic lymphoma and pancreatic cancer

Table 1 Clinical manifestation of pancreatic lymphoma and pancreatic cancer

	Pancreatic lymphoma	Pancreatic cancer	P
Age of onset (yr)	52.8 ± 3.4	53.8 ± 4.2	NS
Gender ratio (male/female)	10/2	24/6	NS
Course of disease	3 mo to 1 yr	4 wk to 3 mo	< 0.05
Weight loss	10	27	NS
Nausea and vomiting	4	12	NS
Fever and night sweats	5	1	< 0.05
Back pain	1	18	< 0.05
Jaundice	3	20	< 0.05
Palpable abdominal lump	6	0	< 0.05
Superficial lymph node enlargement	5	1	< 0.05
CEA, CA19-9 increase	0	18	< 0.05

P < 0.05, the two groups were significantly different.

Table 2 Ultrasonic manifestations of pancreatic lymphoma and pancreatic cancer

	Pancreatic lymphoma	Pancreatic cancer	P
Lesion position
Pancreatic head	7	19	NS
Pancreatic body & tail	3	7	NS
Diffuse	2	4	NS
Lesion echo	All 12 cases had low echo	All 30 cases had low echo	NS
Lesion size	79.6 ± 10.7 mm	34.7 ± 5.5 mm	< 0.05
Blood flow of the lesion	11 cases did not show any blood flow signals, 1 case showed some blood flow signals	None of the 30 cases showed blood flow signals	NS
Bile duct expansion	3	20	< 0.05
Pancreatic duct expansion	2	18	< 0.05
Blood vessel involvement	2	15	< 0.05
Retroperitoneal (below the renal vein) lymph node enlargement	5	1	< 0.05
Intrahepatic metastasis	0	6	< 0.05

P < 0.05, the two groups were significantly different.