Insertional Achilles tendonitis is located:

Insertional Achilles tendonitis specifically refers to the inflammation of the Achilles tendon at its insertion point on the calcaneus (the heel bone). This condition typically occurs where the tendon attaches to the bone, which is just above the heel. Thus, the correct answer indicating the location of this condition is indeed superior to the calcaneus.

This location is crucial in understanding the pathology of insertional Achilles tendonitis because it highlights how the tendon functions in relation to the bone structure it attaches to. Identifying this area is vital for effective assessment and treatment, as the inflammatory process can be exacerbated by various factors such as footwear and biomechanics.

Other options may suggest locations that do not accurately represent where the inflammation typically occurs in this condition. For instance, inferior to the calcaneus would refer to a position below the heel, which is not relevant for insertional tendonitis. Similarly, distal to the calcaneus would imply a location further away from the heel, and anterior to the calcaneus indicates a position at the front of the heel—none of which accurately describe the anatomical area affected in insertional Achilles tendonitis.