Duodenal filling defects

Duodenal filling defects may be caused by a wide variety of duodenal pathology which may be divided by their location and pathological process.

Extrinsic

• gallbladder impression
• common bile duct impression
• gas-filled diverticulum

Intrinsic

Note: please refer to duodenal mucosal nodular filling defects for that specific gamut.

• benign mass
  • adenoma
  • leiomyoma
  • lipoma
  • hamartoma (Peutz-Jeghers syndrome)
  • prolapsed antral polyp
  • Brunner's gland adenoma
  • villous adenoma
  • islet cell tumor
  • gangliocystic paraganglioma
• malignant neoplastic mass
  • carcinoid tumor
  • adenocarcinoma of duodenum
  • ampullary carcinoma
  • lymphoma
  • sarcoma
  • metastases
    • primaries include: stomach, pancreas, gallbladder, colon, kidney, melanoma
  • retroperitoneal lymph node involvement
• non-neoplastic mass
  • papilla of Vater
  • choledochocoele
  • duplication cyst
  • pancreatic pseudocyst
  • duodenal varix
  • superior mesenteric artery collateral
  • intramural hematoma
  • adjacent abscess
  • stich abscess
  • ectopic pancreas
  • heterotopic gastric mucosa
  • prolapsed antral mucosa
  • Brunner's gland hyperplasia
  • benign lymphoid hyperplasia
• intraluminal
  • blood clot
  • gallstone
  • foreign body, feeding tube, food