The posterior abscess appears in the buttock and may make its way to the surface through the gluteus maximus; more often it points at the lower border of this muscle in the region of the great trochanter, or it may gravitate down the thigh.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
W. The small gluteus muscle.
"Surgical Anatomy"
Joseph Maclise
In this groove the gluteus medius is to be seen.
"Artistic Anatomy of Animals"
Édouard Cuyer