Sternalis muscle and right intramuscular lipoma of subscapularis muscle

Case contributed by Dr Safwat Mohammad Almoghazy


A known case of sigmoid colon cancer under follow-up.

Patient Data

Age: 66 years.
Gender: Female

Sternalis muscles are noted bilaterally ( normal variant) appears as a short flat parasternal muscle, longitudinal in orientation.

Stable incidentally noted right side intramuscular subscapularis muscle lipoma and butterfly vertebra D 4  with no suspicious bony lesion.


 Both red arrows pointed to both sternalis muscles. 

Case Discussion

This case of cancer sigmoid underwent sigmoidectomy with liver metastasis on chemotherapy under regular follow-up and demonstrate this uncommon anatomic variant to be aware of because it can misdiagnose as a mass.

The sternalis muscle is an uncommon anatomic variant of the chest wall musculature and is of uncertain etiology and function.


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Case information

rID: 52182
Published: 14th Jun 2017
Last edited: 23rd Jun 2017
Inclusion in quiz mode: Included

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