CSF rhinorrhoea is diagnosed by -: (A) Beta 2 microglobulin, (B) Beta 2 transferrin, (C) Thyroglobulin, (D) Transthyretin
Answer is B. Beta 2 transferring is a protein seen in CSF and not in nasal discharge. Thus its presence is specific and sensitive for diagnosing CSF rhinorrhea. (Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 184)