Final answer:
Destruction of an intranasal lesion via an external approach can be achieved with techniques such as electrocautery, cryotherapy, laser ablation, or chemical cauterization, each utilizing different methods to remove the lesion.
Step-by-step explanation:
The procedure for the destruction of an intranasal lesion using an external approach can be accomplished using various methods, including electrocautery, cryotherapy, laser ablation, and chemical cauterization. Electrocautery involves using electric current to burn away the lesion, while cryotherapy utilizes liquid nitrogen to freeze and destroy the tissue. Laser ablation employs focused light to remove the lesion, and chemical cauterization involves the application of a chemical to burn the tissue.