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Abnormal signal of the tibial bone marrow extending from the proximal epiphysis up to the distal aspect of the diaphysis of low signal on T1, inhomogeneous high signal on T2 with heterogeneous enhancement on post-contrast sequences. Thinning with irregularity of the cortical bone with no cortical break seen. Normal appearance of the fibula.
Circumferential periosseous soft tissue mass of the middle tibial 1/3 (height = 16 cm, thickness = 2 cm) of iso-to low signal to the muscles on T1, high signal on T2 with heterogeneous enhancement displacing the surrounding muscles with effacement of the fat planes. Anteriorly there is infiltration of the subcutaneous and cutaneous tissues with skin ulceration.