Fig. 15
From: Spectrum of imaging findings in osteoarticular tuberculosis
TB osteomyelitis calcaneum-A 18-year-old male presented with chronic discharging sinus over medial aspect of right foot. Plain radiograph of foot (A) shows well-defined lytic lesion without sclerotic rim seen in body of calcaneum, posteriorly (thick arrow). On MRI- sagittal T2 (B), coronal STIR (C) and post-contrast sagittal (D) images show well-defined altered signal intensity area involving posteromedial aspect of body of calcaneum (arrow in B) with surrounding bone marrow oedema, showing thin rim enhancement (arrowhead) and central non-enhancing sequestrum. Cortical breach at superomedial aspect of calcaneum from which a linear enhancing sinus tract seen extending up to skin surface (dotted arrow) with adjacent inflammatory changes. Findings suggestive of chronic osteomyelitis. CBNAAT of pus discharge revealed tubercular aetiology