CSF Rhinorrhea occurs d/t of:: (A) Roof of orbit, (B) Cribiform plate of ethmoidal bone, (C) Frontal sinus, (D) Sphenoid bone
Answer is B. Ans. is 'b' i.e. Cribriform plate of ethmoid bone Commonest area of causing CSF Rhinorrhea - cribriform plate of ethmoid bone as it is extremely thin.Other possible areas of causing CSF RhinorrheaFrontal sinus (Posterior wall)floor of the anterior cranial fossa.Difference between CSF Rhinorrhea & allergic or vasomotor rhinitisCSF contains glucose which can be demonstrated by chemical tests.CSF when collected into a test tube and allowed to stand, it remains clear in contradistinction to nasal discharge that leaves a sediment because of mucus and other proteins.Nasal discharge stiffens the handkerchief and CSF dries soft in it.Treatment:Prophylactic antibiotics & X-ray *If more than 2 wks then correct it surgically.