<prompt> Brain abscess in cyanotic hea disease is commonly antibody is a surrogate marker of one of the following:Cerebellar hemisphereThalamusFrontal lobeParietal lobe  <response>: Brain abscess resulting from cyanotic hea disease tend to embolize to the distribution of middle cerebral aery. Localization of brain abscesses: Localization Mean frequency Frontal lobe 37 Temporal lobe 24 Parietal lobe 22 Occipital lobe 10 Cerebellum 7 Sella 1 Basal ganglia 1 So frontal lobe is the single best answer of choice. Ref: Infections of The Central Nervous System By W. Michael Scheld, Richard J Whitley, Christina M Marra, Page 486; The 5-Minute Pediatric Consult By M. William Schwaz, Page 186. 