<prompt> Most common cause of perforation of cartilaginous part of nasal septum -SyphilisTuberculosisWegeners granulomatosisSeptal abscess  <response>: Ans- D. DB. Causes of septal perforation can be summarized under the following categories: trauma surgical repeated cautery digital trauma nose picking malignant disease malignant tumours non-Hodgkin lymphoma 5 malignant granuloma chronic inflammatory conditions granulomatosis with polyangiitis Wegener granulomatosis 5 syphilis tuberculosis sarcoidosis poisons industrial chronic 3 months cocaine use 4 topical corticosteroids topical decongestants idiopathic 