99mTc-MAA total body imaging of patent right-to-left shunt with invisible brain activity.

99mTc-MAA total body imaging of patent right-to-left shunt with invisible brain activity. Hell J Nucl Med. 2020 May-Aug;23(2):209-210 Authors: Son HJ, Ryu JS Abstract Generally, the presence of brain activity in technetium-99m macro aggregated albumin (99mTc-MAA) total-body imaging is considered a hallmark sign of patent right-to-left shunt. Herein, we present a unique case of a patient with Eisenmenger syndrome, whose 99mTc-MAA total-body imaging showed increased extrapulmonary activities only in the abdomen, pelvis, and both lower extremities and no activity was observed in the brain and upper extremities. The patient previously underwent a Potts shunt operation, which is a surgical approach to perform a side-to-side anastomosis between the left pulmonary artery and the descending aorta to decompress pulmonary hypertension and right ventricular overload. This case presents a unique pattern of 99mTc-MAA total-body imaging for the evaluation of the patency of right-to-left shunt after Pott shunt operation, intentionally made for therapeutic use. PMID: 32830205 [PubMed - in process]
Source: Hellenic Journal of Nuclear Medicine - Category: Nuclear Medicine Tags: Hell J Nucl Med Source Type: research