Abstract
A lipoma is a tumor of adipose tissue cells that can develop anywhere in the body, usually at the subcutaneous level without invading adjacent structures. Its most common location is on the back and extremities. According to the literature, it is considered common in both sexes; however, it is mentioned that it occurs more frequently in females. Clinically, it presents as a slow-growing, painless mass. Although the diagnosis is clinical, an imaging study is usually performed for confirmation and to obtain information about its location, relationship with adjacent structures, and surgical planning. The definitive treatment involves surgical resection with histopathological analysis, providing a definitive diagnosis to rule out malignancy. In the present case report, we will present a 45-year-old female patient, with no significant medical history, who comes for evaluation due to a tumor in her right shoulder approximately 5 cm in size with gradual growth to 20 cm over 12 years, seeking evaluation due to clinical manifestations. A surgical protocol was initiated, with magnetic resonance imaging (MRI) considered the imaging study of choice according to the literature, where a superficial location was observed. A surgical plan was made that included complete resection and histopathological analysis, with post-surgical evaluations at two, four, and six months post-surgery showing no signs of recurrence, remission of symptoms of nerve compression, and appropriate wound healing.