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Table 1 The differential diagnosis using triphasic bone scan

From: Diagnosis and treatment of intramedullary osteosclerosis: a report of three cases and literature review

Phase Malignancy [13] Osteomyelitis [13] Stress fracture [14] IMOS [1], [our cases]
Phase 1: Vascular phase Enhanced blood flow Enhanced blood flow Relatively poor sensitivity Absent
Phase 2: Soft tissue (Blood pool) Soft-tissue hyperemia Soft-tissue hyperemia Lateral/medial blood pool imaging was positive and significantly better than anterior/posterior images Absent or slightly uptake
Phase 3: Delayed (bone) Increased uptake Increased uptake Focal increased tracer uptake Fusiform-shaped intense area of the tracer uptake