title: Subcutaneously obstructed ventriculoperitoneal shuntogram.
abstract: A 65-year-old man presented with headache, altered mental status, and somnolence. The patient had a ventriculoperitoneal (VP) shunt revised a month earlier. A CT of the head was performed, which demonstrated interval development of hydrocephalus compared with the prior examination done at the time of the shunt revision. Further evaluation of the VP shunt dynamics was obtained through a radionuclide shuntogram using 99mTcO4. The shuntogram demonstrated passage of the radiotracer down the VP shunt tubing. This case illustrates the utility of radionuclide shuntogram in demonstrating an unusual cause of hydrocephalus after VP shunt placement.
authors.affiliation: From the *Department of Radiology, University of Washington, Seattle, WA; †Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY; ‡IRCCS Fondazione SDN, Naples; and §Dipartimento di Radiologia, Università degli Studi di Firenze, Florence, Italy.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Mannelli
authors.forename: Serena
authors.initials: S
authors.lastname: Monti
authors.forename: David
authors.initials: D
authors.lastname: Shin
authors.forename: Ivano
authors.initials: I
authors.lastname: Lomabardo
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Behnia
mesh_terms: D000368:Aged; D006801:Humans; D006849:Hydrocephalus / Q000000981:diagnostic imaging* / Q000209:etiology; D008297:Male; D019275:Radiopharmaceuticals / Q000134:cerebrospinal fluid; D013670:Sodium Pertechnetate Tc 99m / Q000134:cerebrospinal fluid; D014055:Tomography, Emission-Computed; D017287:Ventriculoperitoneal Shunt / Q000009:adverse effects*
chemical_list: D019275:Radiopharmaceuticals; D013670:Sodium Pertechnetate Tc 99m