<prompt> Bony septal perforation occurs in:TBSyphilisLeprosySarcoidosis  <response>: b SyphilisRef. Scott Brown, 6th ed., Paediatric, 4 1119Syphilis leads to perforation of the bony part of nasal septum. Another important cause of bony septal perforation is Wegeners granulomatosis.Rest options may lead to perforation of the cartilaginous part of the septum. 