CTICasesEnhancing Left Pectoralis Muscle Mass of Unknown Etiology (Possible Hemangioma or Paraganglioma)
Imaging findings
A heterogeneously enhancing mass is identified beneath the left pectoralis muscle. On contrast-enhanced CT, it shows significant arterial enhancement with some less enhancing areas, but no calcification. The mass has remained stable in size over a one-year period.
Key takeaways
This case presents a diagnostic challenge: an incidentally discovered, heterogeneously enhancing, non-calcified mass under the pectoralis muscle that has been stable in size for a year. The differential includes entities like hemangioma, given its enhancement pattern, or less typically, a paraganglioma, although the location is unusual for the latter. The etiology is currently unknown, prompting further workup or excision.
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