Figure 5a: MR images show development of a sinus tract. (a) Sagittal T1-weighted fat-suppressed postcontrast fast multiplanar spoiled GRE image (230/2) obtained in a 60-year-old man with neuropathic arthropathy of the midfoot and hindfoot shows multiple joint subluxations with subcutaneous enhancement only (arrow). (b) Twelve months later the patient presented with a draining plantar ulcer; another sagittal T1-weighted fat-suppressed postcontrast fast multiplanar spoiled GRE image (280/2) shows a tram-track pattern of soft-tissue enhancement representing a sinus tract (arrowheads) leading to the cuboid (arrow), which demonstrates enhancement proved to represent osteomyelitis at surgery.