autosomal recessive osteopetrosis 7 (Monarch Disease Ontology entry MONDO_0012859) is any autosomal recessive malignant osteopetrosis in which the cause of the disease is a mutation in the TNFRS11A gene. Also known as: OPTB7, TNFRSF11A osteopetrosis (disease), autosomal recessive osteoclast-poor osteopetrosis with hypogammaglobulinemia, autosomal recessive osteopetrosis type 7, osteoclast-poor osteopetrosis with hypogammaglobulinemia, osteopetrosis (disease) caused by mutation in TNFRSF11A, osteopetrosis, autosomal recessive type 7, osteopetrosis-hypogammaglobulinemia syndrome.