title: Hydronephrotic ectopic pelvic kidney simulates sacral metastasis from breast cancer.
abstract: A 57-year-old woman with a history of a right modified radical mastectomy after neoadjuvant chemotherapy for stage IIIB infiltrating ductal breast carcinoma presented for follow-up bone scan. Initial inspection was suspicious for sacral metastasis, but on closer review the absence of renal activity in the left flank was noted. Correlation with CT scan confirmed a hydronephrotic ectopic kidney overlying the sacrum.
authors.affiliation: Nuclear Medicine Service, Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA. prymad@mskcc.org
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Pryma
authors.forename: Tim
authors.initials: T
authors.lastname: Akhurst
mesh_terms: D001943:Breast Neoplasms / Q000000981:diagnostic imaging; D044584:Carcinoma, Ductal / Q000000981:diagnostic imaging / Q000556:secondary; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006869:Hydronephrosis / Q000150:complications / Q000000981:diagnostic imaging*; D007668:Kidney / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D008875:Middle Aged; D010388:Pelvis / Q000000981:diagnostic imaging*; D011859:Radiography; D011877:Radionuclide Imaging; D012447:Sacrum / Q000000981:diagnostic imaging*; D013125:Spinal Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary