Sacral tumor.
D001859:Bone Neoplasms / Q000473:pathology; D002817:Chordoma / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged; D012447:Sacrum; D013125:Spinal Neoplasms / Q000175:diagnosis*