CTICasesDiaphragm Lipoma
Imaging findings
Serial chest and abdominal CT scans show a well-defined, homogeneous fatty mass located within the musculature of the pericrural portion of the diaphragm that slowly increases in size over several years while remaining enclosed by thin muscle fibers.
Key takeaways
Lipoma is the most common benign tumor of the diaphragm, though primary diaphragmatic tumors overall are rare. They can present as intramuscular lipomas, where mature adipose tissue intercalates between and separates the diaphragmatic muscle fibers, and must be differentiated from mechanical trans-diaphragmatic herniation of peritoneal fat.
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