Resting-state functional connectivity density mapping of etiology confirmed unilateral pulsatile tinnitus patients: Altered functional hubs in the early stage of disease

•We studied the abnormal neural activity of patients with pulsatile tinnitus (PT).•The functional connectivity density (FCD) mapping was an effective method.•The connectivity changes could be revealed by bilaterally distributed FCD results.•Our results provided additional clues to differentiate PCC from precuneus.