Based on limited published evidence, ITIH6 is an inter-alpha-trypsin inhibitor heavy chain family member containing conserved VIT and vWA domains plus a unique central region, most closely related to ITIH5 1. The protein exhibits tissue-specific expression in salivary glands, kidney, colon, and stomach, particularly in glandular digestive tract structures 1. ITIH6 demonstrates prognostic significance in cholangiocarcinoma, where elevated expression correlates with favorable outcomes and single lesions 1. The gene has also been identified as a candidate locus in autism spectrum disorder through whole exome sequencing 2.