Journal of Ultrasound in Medicine, Vol 13, Issue 2 91-94, Copyright © 1994 by American Institute of Ultrasound in Medicine
Intramuscular myxoma: sonographic appearance and sonographically guided needle biopsy
B. D. Fornage and M. M. Romsdahl
Department of Diagnostic Radiology, University of Texas M.D. Anderson Cancer Center, Houston 77030.
The sonographic appearances of four intramuscular myxomas were reviewed.
These tumors appeared as well-defined, ovoid masses surrounded by normal
muscle. The echogenicity was decreased in all cases, and the presence of
small fluid-filled clefts and cystic areas was noted in three of the four
lesions. Color Doppler examination was performed in two cases and was
negative. Sonographically guided fine-needle aspiration biopsy yielded a
thick myxoid substance. Large-core cutting needle biopsy allowed
establishment of the diagnosis in one of the two cases in which it was
performed. The differential diagnosis of a well-demarcated intramuscular
mass with multiple fluid-filled clefts or cystic areas should include
intramuscular myxoma.