title: Scintigraphic photopenia in sacrococcygeal chordoma.
abstract: A case with a photon deficient or cold lesion on bone scintigraphy due to sacrococcygeal chordoma is presented. The proposed mechanism is also explained.
mesh_terms: D000368:Aged; D001859:Bone Neoplasms / Q000000981:diagnostic imaging*; D002817:Chordoma / Q000000981:diagnostic imaging*; D003050:Coccyx / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D011877:Radionuclide Imaging; D012447:Sacrum / Q000000981:diagnostic imaging*