Based on limited published evidence, HDHD5 is a mitochondrial protein containing a haloacid dehalogenase-like hydrolase domain. GO annotations indicate involvement in mitochondrial localization and glycerophospholipid biosynthetic processes. HDHD5 was identified as one of thirteen mitochondrial lipid metabolism-related genes associated with colorectal cancer prognosis 1, where it contributed to a prognostic risk model correlating with tumor microenvironment composition and immune checkpoint expression. However, specific enzymatic function and direct molecular mechanisms remain undocumented.