Evaluation of the Efficacy of the Use MD Tissue Collagen Medical Device in the Infiltrative Treatment of Greater Trochanter Pain Syndrome (GTPS)

Greater Trochanteric Pain Syndrome, also known as GTPS (Greater Trochanteric Pain Syndrome) is a complex clinical condition characterized by chronic and recurrent pain in the lateral region of the hip, near the greater trochanter of the femur. Biomechanical and anatomic-histologic interactions of the structures of the peri trochanteric space, in which, given the close anatomic-functional relationships, the origin can be traced to three different pathologic entities that may influence each other and fuel the progressive exacerbation of symptomatology. These are: external snap hip, trochanteric bursitis, and tendinopathies of the tendons of the gluteus mediums and gluteus minimums muscles. Recent studies regarding GTPS have shown that in most cases this condition is due to degenerative tendinopathy of the tendons of the gluteus minimums and gluteus mediums muscles. Tendinopathy is defined as a pathological condition associated with histological changes that may result in a change in the organization of collagen fibrils, relative increase in the percentage of proteoglycans, glycosaminoglycans, and no collagenous components of the ECM accompanied by neo-vascularization and inflammatory state. Tendinopathies thus result in painful symptomatology that very often also results in biomechanical functional deficit. Clinically, GTPS presents as pain that is often debilitating and exacerbated by activities such as walking, climbing stairs, and lying on the affected side at night, associated with a progressive loss of stenia in hip abduction movements. On objective examination, a point of tenderness (trigger point) is noted at the level of the region of the greater trochanter, which may radiate to the lumbar area and along the lateral aspect of the thigh to the ipsilateral knee and a difficulty on strength versus resistance tests in hip abduction movements. Although it is a very common syndrome, the treatment of painful grand trochanter syndrome, as well as that of tendinop