TCIRG1 and autosomal dominant osteopetrosis: A de novo missense variant in TCIRG1 has been reported in a 3‐year‐boy diagnosed with autosomal dominant osteopetrosis.(56) However, since parents of other osteopetrosis patients carrying the same variant were healthy, a dominant effect of a single pathogenic variant in TCIRG1 on bone quality is yet unclear.(57)