Schwartze sign is seen in-
In Otosclerosis on Otoscopy

Tympanic membrane is normal in appearance mostly, middle ear space is well pneumatized and malleus moves with pneumatic otoscopy (i.e. mobility is normal)
Sometimes a reddish hue / Flammingo-pink may be seen on the promontory and oval window niche owing to the prominent vascularity associated with an otospongiotic focus. This is known as Schwartz sign.
Glomus Jugulare
Otosclerosis
Meniere's diseases
Acoustic neuroma
Otosclerosis