Holman Millar sign is seen in
Anterior bowing of the posterior wall of maxillary sinus often called antral sign or Holman-Miller sign, which is pathognomic of angiofibroma Ref:(Diseases of Ear, Nose and Throat, P.L Dhingra, 7th edition, page 281)
Nasopharyngeal angiofibroma
Cranipharyngioma
Nasopharyngeal carcinoma
Laryngeal carcinoma
Pharynx