Teardrop sign is seen in
High-Yield Explanation
In 'blowout fractures' or fractures of orbital floor, x-ray shows a convex opacity bulging into the antrum from above. This occurs because of the herniation of orbital contents into the antrum. This sign is known as teardrop sign or teardrop opacity. Ref: Textbook of diseases of ENT; PL Dhingra, 7th edition, pg no. 206