This case report describes a 70-year-old woman who presented with a lump at the right knee. She had had a fall while jogging two years previously, followed by the development of a painless mass at the injury site. The mass had gradually increased in size over time. At presentation the physical examination revealed a soft, ill-defined mass, and magnetic resonance imaging confirmed a well-circumscribed subcutaneous soft tissue mass consistent with a lipoma. Given the asymptomatic nature and well-defined characteristics of the mass, the patient opted for conservative management with observation. This case highlights the importance of considering post-traumatic lipoma in the differential diagnosis of soft tissue masses, particularly in patients with a history of trauma. Such masses should be regularly monitored to allow timely intervention if indicated.
Keywords: knee; lipoma; mass; post-traumatic.
© The Author(s) 2024. Published by Oxford University Press.