Osteopetrosis, Autosomal Recessive 3, also known as osteopetrosis with renal tubular acidosis, is related to renal tubular acidosis, distal, 1 and distal primary acidosis, familial. An important gene associated with Osteopetrosis, Autosomal Recessive 3 is CA2 (Carbonic Anhydrase 2), and among its related pathways/superpathways are Metabolism and Transport of inorganic cations/anions and amino acids/oligopeptides. Affiliated tissues include bone and bone marrow, and related phenotypes are renal tubular acidosis and osteopetrosis