- Gluteus medius, gluteus minimus, greater trochanter
- The two buttock muscles on the side of the hip and the bony point their tendons attach to. Medius attaches to the side and the upper back of the bony point, minimus to its front (the lateral, superoposterior and anterior facets).
- Tendinosis, tendinopathy, tendinitis
- The tendon looks thickened, or its normal pattern has changed on ultrasound or its signal is brighter on MRI. Tendinosis describes that look, tendinopathy is the name for a painful tendon problem, and tendinitis is an older word some reports still use.
- Peritrochanteric edema or fluid, peritendinitis
- Bright fluid signal on MRI around the bony point, in or around the tendons and the bursa; peritendinitis means it sits around a tendon. In one study it was found in 88 percent of hips with no pain on the outside (Blankenbaker et al., 2008).
- Trochanteric bursitis, bursal thickening, bursal fluid or distension
- The sac over the tendons looks thickened or holds more fluid than usual. Two smaller sacs, the subgluteus medius and subgluteus minimus bursae, sit under the tendons. In people with this pain, bursitis was less common on ultrasound than tendon changes (Long et al., 2013).
- Partial-thickness, interstitial or undersurface tear
- A split through part of the tendon. Interstitial means inside the tendon; undersurface means on the side next to the bone. Partial tears are also found in hips without symptoms (Arvesen et al., 2022).
- Full-thickness tear, retraction, avulsion
- The tear goes all the way through the tendon. Retracted means the torn end has pulled back; avulsion means the tendon has come away from the bone. These are the findings most worth a surgical opinion, particularly with weakness or a limp.
- Enthesopathy, cortical irregularity, enthesophyte
- Changes where the tendon attaches to the bone: a roughened bone surface or a small bony spur. They are read together with the tendon findings rather than as a separate problem.
- Calcification, calcific tendinopathy
- Calcium deposits in the tendon near its attachment, which show on X-ray and ultrasound. Like the other findings, they are weighed against your symptoms and examination.
- Thickened iliotibial band
- The band of tissue that runs over the bony point looks thicker than usual. It was found in 28.5 percent of people with this pain on ultrasound (Long et al., 2013).
- Fatty atrophy or fatty infiltration
- Part of the muscle looks replaced by fat. It is graded by how much, and it is one of the things a surgeon weighs if a tendon repair is being discussed.