Body of Pancreas: Anatomy, Relations, Function, Clinical Significance, MRI & CT Imaging

Topic

Body of pancreas

The body of the pancreas is the elongated central portion of the gland, situated between the neck and the tail. It crosses transversely in the upper abdomen, lying retroperitoneally, and extends to the hilum of the spleen. The body is the largest portion of the pancreas and plays an important role in both exocrine (digestive enzyme production) and endocrine (hormonal secretion) functions.

Because of its proximity to major vessels and abdominal organs, the pancreatic body is a key region in radiology and surgery, especially in relation to pancreatic cancer, pancreatitis, and vascular involvement.

Synonyms

Pancreatic body
Middle pancreas segment
Truncal portion of pancreas

Location and Relations

Anteriorly: Stomach (separated by the lesser sac) and transverse mesocolon
Posteriorly: Aorta, left kidney, left adrenal gland, splenic vein, superior mesenteric vessels
Superiorly: Splenic artery runs along the upper border of the body
Inferiorly: Jejunum loops and ligament of Treitz region
Laterally:
- Right: Pancreatic neck
- Left: Pancreatic tail and splenic hilum

Function

Exocrine: Produces digestive enzymes (amylase, lipase, proteases) secreted into the pancreatic duct, aiding digestion in the duodenum
Endocrine: Contains pancreatic islets (islets of Langerhans) that secrete insulin, glucagon, and somatostatin to regulate blood sugar
Maintains continuity of the main pancreatic duct (duct of Wirsung) across its length
Provides structural support for vascular relations of splenic vessels

Clinical Significance

Pancreatic carcinoma: Tumors in the pancreatic body often present late and may involve splenic vessels or adjacent retroperitoneal structures
Pancreatitis: The body may show edema, necrosis, or pseudocyst formation
Surgical relevance: Important in distal pancreatectomy and splenectomy procedures
Vascular involvement: Splenic vein thrombosis and splenic artery encasement are common complications of pancreatic body pathology
Cysts and neoplasms: Serous or mucinous cystic neoplasms frequently involve the pancreatic body

MRI Appearance

T1-weighted images:

Normal body: homogeneous intermediate signal intensity, slightly brighter than liver
Fat planes around the gland: bright, defining glandular margins
Tumors: hypointense compared to normal pancreas

T2-weighted images:

Normal body: low-to-intermediate signal intensity
Pancreatic duct: bright linear tubular signal running within body
Cysts/collections: bright hyperintensity; tumors often mildly brighter than normal tissue

STIR (Short Tau Inversion Recovery):

Normal body: low-to-intermediate signal
Inflammation, edema, or tumor infiltration: bright hyperintensity

T1 GRE Fat-Sat Pre-Contrast:

Normal body: homogeneous intermediate signal
Lesions: hypointense masses (adenocarcinoma, cystic lesions) compared to parenchyma

T1 GRE Fat-Sat Post-Gadolinium:

Normal body: intense, homogeneous early enhancement (reflecting rich vascular supply)
Tumors: remain hypoenhancing focal areas compared to enhancing pancreas
Pancreatitis: patchy, heterogeneous enhancement; necrotic regions remain non-enhancing
Cysts: non-enhancing, with enhancing capsule if inflamed

CT Appearance

Non-Contrast CT:

Normal body: soft tissue density, slightly higher attenuation than muscle
Fat planes: outline gland clearly
Tumors: appear as hypoattenuating focal or diffuse areas

Post-Contrast CT:

Normal body: enhances intensely and homogeneously in arterial and venous phases
Tumors: appear hypoattenuating compared to normal enhancing pancreas
Pancreatitis: enlarged gland, heterogeneous enhancement, peripancreatic fat stranding, and fluid collections
Cysts/abscesses: low-attenuation lesions; infected cysts show rim enhancement

MRI image

CT image

Topics