progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal recessive 2 (MONDO_0014656) is any progressive external ophthalmoplegia with mitochondrial DNA deletions in which the cause of the disease is a mutation in the RNASEH1 gene. Also known as: RNASEH1 progressive external ophthalmoplegia with mitochondrial DNA deletions, progressive external ophthalmoplegia with mitochondrial DNA deletions caused by mutation in RNASEH1, progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal recessive type 2.