Cawheel sign is seen in: (A) ASOM, (B) CSOM, (C) Serous otitis media, (D) Tuberculous otitis media
Answer is A. Cawheel appearance is seen in ASOM. Leash of blood vessels appears along the handle of malleus and at the periphery of tympanic membrane impaing it a ca-wheel appearance. Later, whole of tympanic membrane including pars flaccida becomes uniformly red. Seen in stage of Presuppuration Reference: Dhingra; Chapter 10; Page no: 62