The investigators' objective is the anatomical analysis of hips studied through MRI, assessing their morphological characteristics and correlating them with the pathology found.

A retrospective search was performed using a database of consecutive reports of 137 adults pelvis MRI examinations obtained at MRI center in Zaragoza.

In all the images the investigators are going to measure the ischiofemoral space, quadratus femoris space, cervicodiaphysal angle and femoral version angle. The investigators evaluated different qualitative changes in the signal intensity of the quadratus femoris muscle as normal, edema, fatty infiltration or atrophy, and of the gluteus muscles as tendinopathy or atrophy, too.

The investigators' objective is the anatomical analysis of hips studied through MRI, assessing their morphological characteristics and correlating them with the pathology found.

A retrospective search was performed using a database of consecutive reports of 137 adults pelvis MRI examinations obtained at MRI center in Zaragoza.

The investigators create a protocol for a retrospective review study, with the aim of analysis all the recorded MRI findings during this time. The criteria for patient inclusion were: Age > 18 years old, who had realised a pelvis MRI for any cause at MRI Center. Exclusion criteria included age < 18 years old, inadequate imaging quality, medical history likely to affect pelvic and hip morphometry: pelvic oncological disease, infection or inflammatory arthritis, postsurgical change disruptions, soft tissue abnormality, avascular necrosis, or pelvic and hip fracture.

In all the images the investigators are going to measure the ischiofemoral space, quadratus femoris space, cervicodiaphysal angle and femoral version angle. The investigators evaluated different qualitative changes in the signal intensity of the quadratus femoris muscle as normal, edema, fatty infiltration or atrophy, and of the gluteus muscles as tendinopathy or atrophy, too.

Inclusion Criteria:

• Age > 18 years old

Exclusion Criteria:

• Age < 18 years old
• Inadequate imaging quality
• Medical history likely to affect pelvic and hip morphometry: pelvic oncological disease, infection or inflammatory arthritis, postsurgical change disruptions, soft tissue abnormality, avascular necrosis, or pelvic and hip fracture.

People who had realised a pelvis MRI for any cause at MRI Center in Zaragoza.