Sacrococcygeal chordoma: Increased 99mTc methylene diphosphonate uptake on single photon emission computed tomography/computed tomography bone scintigraphy
A 37-year-old female patient with non-traumatic back pain for the last 2 months was found to have a soft tissue mass in the sacral region on magnetic resonance imaging, with destruction of the sacrum and coccyx, heterogeneous enhancement of L3-L5 vertebrae and invasion of both iliac bones. A chordoma was diagnosed on ultrasound guided fine needle aspiration. 99mTc MDP whole body bone scintigraphy [] showed increased tracer uptake in the sacrum, L5 vertebra and both iliac bones. Hybrid single photon emission computed tomography/computed tomography (SPECT/CT) images of the pelvis showed increased tracer uptake in the sacrum and L5 vertebra with bilateral iliac involvement and extensive corresponding osteolysis [].