Rocker bottom foot SNOMEDCT_US:205359003 MEDDRA:10066242 HP:0001835 HP:0001838 Rocker bottom feet Rocker bottom foot Rockerbottom feet The presence of both a prominent heel and a convex contour of the sole. Rocker-bottom feet Congenital vertical talus SNOMEDCT_US:205082007 HP:0010218 HP:0004693 Congenital vertical talus is characterized by pes valgus, a rigid flatfoot deformity (as opposed to a flexible calcaneovalgus foot) caused by a malpositioned navicular bone at the neck of the talus; the ankle is in severe equinus and the forefoot in dorsiflexion, rocker bottom-like, accompanied by contraction of the talonavicular, deltoid and calcaneal cuboidal ligaments. The foot examination usually reveals a rigid foot with a "reversed" arch, a convex plantar surface, and a deep crease on the lateral dorsal side of the foot. The ankle joint is plantarflexed, while the midfoot and forefoot are extended upward. Lateral foot radiographs are helpful in confirming the diagnosis. UMLS:C0240912 Abnormal talus morphology