Aggressive angiomyxoma

Aggressive angiomyxomas are rare pelvic tumours that arise in the pelvis and typically cross the the levator ani muscles. Despite its name, it is essentially a benign tumour and the term "aggressive" is given due to predilection for local recurrence. Only rarely does it metastasise.  

It is seen predominantly in women (> 90%) , in the second through fourth decades of life 3.

Aggressive angiomyxomas are mesenchymal tumour which arises from connective tissue.

Classically shows involvement of both pelvic and perineal compartments.

CT

On  CT,  a  well-defined  mass with attenuation less than or equal to that of adjacent skeletal muscle is typically seen, often with swirled enhancing tissue internally 3.

MRI

Reported signal characteristics of the lesion includes

  • T1: tends to be iso to low signal 
  • T2: predominantly high signal and typically gives a swirling appearance 
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Article Information

rID: 866
Section: Pathology
Tags: pelvis, cases
Synonyms or Alternate Spellings:
  • Aggressive angiomyxomas

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