Kalenderer et al . presented a case with HO in the quadratus femoris muscle reclining from the femur to the pelvis.
Heterotopic ossification in quadratus femoris muscle in a haemophilic patient.
Persistent sciatica induced by quadratus femoris muscle
tear and treated by surgical decompression: a case report.
(2007) mentioned that the superior gemellus muscle can merge with the piriformis muscle or gluteus minimus muscle, and the inferior gemellus muscle can fuse with the quadratus femoris muscle. This was confirmed by Naito et al., who noted that at 15 weeks of development, the superior gemellus muscle binds both to piriformis muscle tendon and the belly of the obturator internus muscle, while the inferior gemellus joins the quadratus femoris muscle.
In the study of Shinohara, in most cases, the superior gemellus muscle received a double innervation from quadratus femoris muscle nerve and obturator internus muscle nerve (12 of 14 corpses).
Ischiofemoral impingement (IFI) is characterized by a narrowed space between the ischial tuberosity and the lesser trochanter resulting in repetitive impingement of the quadratus femoris muscle
The quadratus femoris muscle
appeared healthy distally.
Caption: Figure 5 Axial ultrasound image of the left hip showing the borders of the quadratus femoris muscle
Various types of osteosynthesis options available are valgus osteotomy, free or vascularised fibular graft, quadratus femoris muscle
pedicle graft, combined osteotomy with fibular graft and Non vascularised cortical autografts.
It would appear the inferior to middle-medial to lateral portion of the hip joint are supplied by branches of the sciatic nerve directly, or through the trunk that is given off to the quadratus femoris muscle
. Variations include multiple branches from the nerve to the quadratus femoris, different trajectories through the greater and/or lesser sciatic notch, branches from nerves to the obturator internus or superior gemellus, and direct innervation from the sacral branches or obturator nerve.
The periosteum distal to the quadratus femoris muscle
is also incised and mobilized posteriorly and distally.
crossing posteriorly to the obturator internus, gemelli and the quadratus femoris muscles
(Williams et al., 1995).