Aggressive angiomyxomas are rare tumors that arise in the pelvis and typically cross the levator ani muscles. Despite its name, it is essentially a benign tumor and the term "aggressive" is given due to a predilection for local recurrence. Only rarely does it metastasize.
It is seen predominantly in women (>90%) in the second through fourth decades of life 3.
Aggressive angiomyxoma is a mesenchymal tumor that arises from connective tissue.
Classically shows involvement of both pelvic and perineal compartments.
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.
Reported signal characteristics of the lesion include:
- T1: tends to be iso to low signal
- T2: predominantly high signal and typically gives a swirling appearance
- 1. Sinha R, Verma R. Case 106: aggressive angiomyxoma. Radiology. 2007;242 (2): 625-7. doi:10.1148/radiol.2422040656 - Pubmed citation
- 2. Outwater EK, Marchetto BE, Wagner BJ et-al. Aggressive angiomyxoma: findings on CT and MR imaging. AJR Am J Roentgenol. 1999;172 (2): 435-8. AJR Am J Roentgenol (abstract) - Pubmed citation
- 3. Haaga JR, Boll D. CT and MRI of the whole body. Mosby. (2009) ISBN:0323053750. Read it at Google Books - Find it at Amazon