Nasal septum perforation occurs in all the following except -

Causes of septal perforation are : - 1) Trauma 2) Iatrogenic : - Nasal surgery, nasal intubation or nasogastric tube placement Chronic inflammation (Wegener's granulomatosis, Syphilis, T.B. Leprosy, atrophic rhinitis, Sarcoidosis) Nasal myiasis Rhinolith or neglected foreign body. As a complication of septal abscess or hematoma, if drainage is delayed. Poisons (cocaine, topical steroids and decongestants) Tumors of septum e.g., chondrosarcoma, granuloma