Is surgery required for a tumor growing between the fat layer and muscle layer in the left buttock?

A mass appearing between the fat layer and the muscle layer in the left buttock may be caused by various factors, including but not limited to lipoma, cyst, fibroma, or other types of tumors. Whether surgery is required for such a mass mainly depends on its nature, size, location, and whether it causes pain or functional impairment.

Generally, clinical examination, imaging studies, and possibly a tissue biopsy are needed to determine the nature of the mass. If the mass is a lipoma, a common type of benign soft tissue tumor, and is small without causing pain or discomfort, special treatment is usually unnecessary, and observation of its changes is sufficient. However, if the mass increases in size, shows potential for malignancy, causes pain, or compresses nerves or blood vessels, surgical excision is typically required to completely remove the affected tissue and prevent recurrence, followed by pathological examination to confirm its nature.

If you encounter such a problem, it is recommended to seek medical treatment at a hospital immediately.