This 64-year-old carpenter felt pop in midfoot and noticed some time later flattened, pronated foot. Clinically, picture resembled posterior tibial tendon insufficiency, but tendon was intact. A, Radiographic weight-bearing view showed widening of metatarsal-cuneiform articulation plantarward and collapse at this articulation. B, Note also overlapping of metatarsals compared with uninjured right foot, indicating pronation of forefoot.