You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A 10-year-old boy presents with nasal obstruction and intermittent profuse epistaxis. He has a firm pinkish mass in the nasopharynx. All of the following investigations are done in this case except- and explain in detail?
Biopsy can cause profuse bleeding, therefore should be avoided.
Investigations used for NFA are :-


Soft tissue lateral film of nasopharynx
X-ray paranasal sinus and base of skull
Contrast CT of skull (investigation of choice)
MRI
Carotid angiography