Expansile fat-containing rib lesion

Case contributed by Mikhail Liubchak


Referred for assessment of bile ducts at abdominal MR/MRCP by the gastroenterologist. CECT was recommended by the radiologist as an additional exam.

Patient Data

Age: 70 years
Gender: Male

Incidentally discovered expansile fat-containing lesion in the left 12th rib abutting the costovertebral joint and displacing the diaphragm. No appreciable diffusion restriction is noted.
The patient refused to contrast injection at MR and was referred for contrast-enhanced CT.

Expansile, macroscopic fat-containing lesion in the head-neck of left 12th rib, with lobulated borders and cortical thinning. No marked contrast enhancement noted on contrast-enhanced series. 

Case Discussion

The MR and CT studies show a lobulated fatty lesion in head-neck of the left 12th rib. The macroscopic contents of fat with sparse soft tissue intensity/density are similar in appearance to that of soft-tissue angiolipomas.

The differential diagnosis could include:

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Case information

rID: 53528
Published: 25th May 2017
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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