Abstract
OBJECTIVE. The purpose of this study was to investigate the frequency of abnormalities of the spring ligament, sinus tarsi, and plantar fascia revealed on MR imaging in a group of patients with advanced injury of the posterior tibial tendon.MATERIALS AND METHODS. MR images from 25 patients with advanced posterior tibial tendon injury were retrospectively examined for spring ligament, sinus tarsi, and plantar fascia abnormalities. These images were randomly compared with those obtained from 25 control patients with normal-appearing posterior tibial tendons.RESULTS. The spring ligament was abnormal in 23 (92%) of 25 patients with a posterior tibial tendon injury and seven (28%) of 25 patients with a normal posterior tibial tendon (p < 0.0001). The sinus tarsi was abnormal in 18 (72%) of 25 patients with posterior tibial tendon injury and nine (36%) of 25 patients with a normal posterior tibial tendon (p < 0.0132). The plantar fascia was abnormal in seven (32%) of 22 patients with posterior tibial tendon inj...