This is part of the hip at the back of the pelvis. It contains the following

BONES: Hip bone

Muscles: Gluteus maximus Gluteus medius Gluteus minimus Tensor fasciae latae Piriformis Obturator internus Quadratus femoris Obturator externus

Arteries: Superior gluteal artery, inferior gluteal artery

Veins: Superior gluteal veins, inferior gluteal vein

Nerves: Superior gluteal nerve, inferior gluteal nerve, sciatic nerve, nerve to obturator internus, posterior cutaneous nerve of thigh. Nerve to quadratus femoris.

Others:  Fat

Dissector