Any progressive external ophthalmoplegia with mitochondrial DNA deletions in which the cause of the disease is a mutation in the POLG2 gene. The disease is progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 4 (Monarch Disease Ontology entry MONDO_0012415). Also known as: POLG2 progressive external ophthalmoplegia with mitochondrial DNA deletions, progressive external ophthalmoplegia with mitochondrial DNA deletions caused by mutation in POLG2, progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant type 4.