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1. DDx :

 

Lymphoma
Adenocarcinoma
GIST

 

2. KEY POINTS :

 

  • Because malignant mesothelioma arises the mesothelial cells of the serosal membrane, it can be found in any serosal membrane including the pleura, peritoneum, pericardium, and tunica vaginalis.
  • The CT features of malignant peritoneal mesotheliomas range a “dry” appearance, consisting of peritoneum-based masses , to a “wet” appearance, consisting of ascites, irregular nodular peritoneal thickening, and an omental mass. Scalloping direct invasion of adjacent abdominal gans may also be seen.
  • Associated calcified plaques are uncommon in malignant peritoneal mesotheliomas in contrast to the pleural counterpart.
  • In approximately half of the repted cases, the patient has a histy of asbestos exposure
  • Rarely it may cause aneurismal dilatation of the bowel.

 

References :

 

1.            Diop AD, Fontarensky M, Montoriol PF, and Da Ines D, CT imaging of peritoneal carcinomatosis and its mimics. Diagn Interv Imaging, 2014. 95(9): p. 861-872.

2.            Park JY, Kim KW, Kwon HJ, Park MS, Kwon GY, Jun SY, et al., Peritoneal mesotheliomas: clinicopathologic features, CT findings, and differential diagnosis. AJR Am J Roentgenol, 2008. 191(3): p. 814-25.

 

Case

Contributed by :

abdomenrad
TEACHING POINTS
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Patient Data :


Age : 48 - Gender : Male

Diagnosis :
Malignant mesotelioma

Findings :

Abdominal CT scan shows irregular diffuse tumoral wall thickening and dilatation of jejunal segment (aneurysmal dilatation of bowel) in the left abdomen. Oral contrast filling into tumoral segment verifies that it originates from bowel.

History :
A patient with abdominal pain, weight loss, lethargy, pyrexia of unknown origin was admited to the hospital. A palpable abdominal mass was detected during physical examination.
     
1- CT
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