Teardrop sign is seen in
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
Fracture of zygomatic arch
Fracture of maxilla
Fracture of mandible
Blow out fracture
Nose and paranasal sinuses