Case report: acute spontaneous Achilles tendon rupture in a patient with giant cell arteritis.

We report a case of a 69-yr-old previously healthy man with acute spontaneous Achilles tendon rupture and severe tendonitis, which occurred after 2 weeks of steroid therapy for newly diagnosed giant cell arteritis. The Achilles tendon rupture was treated conservatively and the tendonitis resolved incrementally with steroid dose reduction. The patient made a complete recovery. In view of the widespread use of steroids in practice, this novel case presentation has important clinical implications. The tendon rupture early in the course of high-dose steroid therapy expands the understanding of this adverse reaction, which was previously reported only with long-term steroid therapy. The severe tendonitis responded to steroid therapy reduction suggesting a dose correlation. This report adds to a sole previous report of a spontaneous Achilles tendon rupture associated with giant cell arteritis.