Isolated Processus Anconaeus
Isolated Processus Anconaeus / IPA
Mediolateral (lateral) X-rays of an elbow joint (flexed). Typical angle for detection of IPA.
Normal processus anconaeus (blue arrow)
Proc. anconaeus not associated with the olecranon (white arrow), secondary changes in the joint (red arrows). The lower red arrow in Fig. 2 shows the blurred medial coronoid process which is a sign of coronoid disease. IPA typically occurs in combination with coronoid disease.
The upper red arrow shows the irregular border of the “fusion site” and adjacent sclerosis.