Omental Masses


True omental cysts are discovered most frequently in children or young adults. They are generally asymptomatic and detected incidentally at laparotomy or at autopsy. Large cysts may produce a palpable abdominal mass or cause diffuse abdominal swelling. On plain abdominal radiographs and barium studies, omental cysts appear as nonspecific soft tissue masses causing displacement or pressure effects on adjacent bowel loops. Ultrasound or CT shows an omental cyst as a fluid-filled mass that often contains internal septations.

Benign tumors of the omentum are very rare; most are composed of spindle cell elements. Computed tomography can demonstrate the fatty nature of an omental lipoma. On ultrasound, these tumors typically appear as strongly echogenic masses with good sound transmission.

By far the most common tumor of the omentum is metastatic carcinoma. Diffuse neoplastic infiltration of the greater omentum produces the distinctive CT appearance of a soft tissue mass separating the colon or small intestine from the anterior abdominal wall, with obliteration of the normal fat plane in the area. Such “omental cakes” are most frequently produced by metastatic ovarian adenocarcinoma; other causes include metastases frorp cervical, endometrial, and colon carcinoma.

omental mass · omental mass abdomen · omental masses ·

Comments are closed.

  • Advanced Random Posts


    • Lymphedema
      : An abnormal accumulation of lymph in the extremities may be due to a primary developmental anomaly or, more commonly, may be secondary to an inflammatory, traumatic, parasitic, or neoplastic obstructi...



    • Endocardial Cushion Defect
      : In this congenital anomaly, most often seen in children with Down's syndrome, a low atrial septal defect (ostium primum type) is associated with a high ventricular septal defect. Associated abnormalit...


    • Clostridial Infections: Gas Gangrene Bubbles or streaks of gas in the subcutaneous or deeper tissues may be seen in gas gangrene, a clostridial infection that develops in anoxic, devitalized tissues in which circulation has...


    • Intestinal Polyposis Syndromes: The intestinal polyposis syndromes are a diverse group of conditions that differ widely in the histology of the pftlyps, the incidence of extracolonic polyps, extra-abdominal mahifestations, and the p...


    • Infantile Polycystic Disease: Infantile polycystic disease is a rare, usually fatal, autosomal recessive disorder that manifests itself at birth by diffusely enlarged kidneys, renal failure, and maldevelopment of intrahepatic bile...