Table 1.

Patient Characteristics

Patients (N)	43
Males	25
Females	18
Age (years)
Mean ± SEM	51 ± 2
Range	29–86
Multiple endocrine neoplasia type 1 (N)	0
Disease duration (years)
Mean ± SEM	6.9 ± 1.1
Range	0.5–10.2
Fasting serum gastrin (pg/ml)
Mean ± SEM	969 ± 162
Range	87–3862
Histologically confirmed tumor location
Primary tumor (N patients)*	32
Pancreas	19†
Duodenum	14
Other	3‡
Hepatic metastases (N patients)§	18¶

^*Primary tumor location was determined by laparotomy. In two patients no primary tumor was found.

^†Four patients had two primary tumors with a tumor in the pancreas and duodenum and these are both included in tumor location.

^‡One patient had a primary tumor in the left kidney; one patient had a primary tumor in a common bile duct lymph node; one patient had a primary tumor in the porta hepatitis.

^§Metastatic tumor in the liver was found at surgery in nine patients and by percutaneous liver biopsy in nine patients.

^¶Seven patients are included in both the primary tumor and liver tumor groups.