Transient osteoporosis of the hip


Idiopathic transient osteoporosis of the hip (ITOH) is a self limiting entity of unknown cause, although thought to have a vascular basis and possible overactivity of the sympathetic system.

Traditionally taught as being a condition of pregnant women, it is in reality more common in middle aged men, as in this case.

Striking high signal in demonstrated in the TIRM sequences, especially when compared to the normal left side on the coronal sequences.  Its appearances are different to those of AVN.