79-year-old female. Enlarging left hip mass. Pain. Evaluate for chronic calcified trochanteric bursitis. 5.1 x 2.2 cm lesion in the left buttock subcutaneous tissues immediately dorsal to the gluteus maximus muscle (series 6, image 15). It is comprised of speckled T1/T2 hypointense foci diffusely consistent with calcifications, better seen on prior CT, and shows interspersed fat, most likely representing fat necrosis. This lesion is not significantly changed in size from immediate prior CT, and was present on 2005 CT, though difficult to compare as it was incompletely imaged on that exam.Diffuse atrophy of the pelvic muscles. Bone marrow signal intensity is within normal limits. No evidence of trochanteric bursitis.
Calcified left buttock subcutaneous lesion most consistent with fat necrosis. No evidence of trochanteric bursitis.