A slip connecting the peroneus longus and tibialis posterior tendons at the forefoot: MRI, anatomic, and histologic findings in a cadaver.

343 T he anatomy of the peroneus longus (PL) and tibialis posterior (TP) tendons in the hindfoot and midfoot as well as the distal branching of these two tendons has been previously described (1–3). However, although the existence of a sizable tendinous slip between these two tendons, close to the PL tendon insertion site at the first metatarsal base, is described in the anatomic literature, its presence has not been confirmed with magnetic resonance imaging (MRI) (3). Such a connection may provide support to the transverse arch of the foot. In this cadaveric case, the connection described above is documented using high-resolution MRI with anatomic and histologic correlation.