Delayed oleoma formation with injection of oil-suspended testosterone: A case report and review of pathogenesis.

This is the case report of a 51-year-old man who was seen in consult with plastic surgery presenting with painful, disfiguring, submuscular nodules in the bilateral deltoids and right gluteal regions. Pre-operative investigations confirmed the presence of multiple heterogeneous, complex non-vascular fluid collections in the subcutaneous and intramuscular layers. The origin of these lesions was unknown until the post-operative follow-up appointment where the patient revealed that he had injected those areas with testosterone suspended in oil 9 years prior. Later, pathology reports confirmed the presence of numerous granulomas containing yellow viscous fluid and focal areas of calcification consistent with the diagnosis of oleomas. This case presents an important differential in the diagnosis of subcutaneous nodules and a review of pathophysiology of granuloma formation, and highlights some of the complications of oil injection use by bodybuilders.