Obstructive hydronephrosis with I-131 MIBG accumulation mimicking huge pheochromocytoma: A diagnostic pitfall found with Tc-99m MDP imaging
Journal
Clinical Nuclear Medicine
Journal Volume
21
Journal Issue
12
Date Issued
1996
Author(s)
Kao P.-F.
KAI-YUAN TZEN
Huang M.-J.
You D.-L.
Abstract
A case of severe obstructive hydronephrosis, which caused a false-positive I-131 MIBG scan for detection of a pheochromocytoma is reported. A huge area of persistent I-131 MIBG accumulation 72 hours after injection in the left flank region was suspected to be a huge pheochromocytoma. Combined studies with I-131 MIBG, Tc-99m MDP, Tc-99m DMSA, and Tc-99m DTPA as well as furosemide injection disclosed that the abnormal I-131 MIBG accumulation was caused by left obstructive hydronephrosis. The result was finally confirmed by intravenous pyelography and CT studies.
Type
journal article