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The psoas minor muscle, although present in only about 40-50% of the population, plays a minor role in lumbar spine function. However, its variations in morphology and anatomical presentation can have significant clinical implications. This research article explores the variations in the morphology of the psoas minor, including differences in its origin, insertion, and presence, as well as their potential impact on spinal and pelvic surgeries. Furthermore, the article discusses the diagnostic challenges posed by these variations, emphasizing the importance of comprehensive anatomical understanding in both clinical practice and surgical planning.