system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Prussak's space is situated in:
assistant
The correct answer is  (a) Epitympanum(Ref. Cummings, 6th ed., 1983)The space of the epitympanum, lying in between the Shrapnell's membrane or pars flaccida and the neck of malleus is known as "PRUSSAK'S SPACE".When the retraction pocket on Pars flaccida grows medially, it goes into this Prussak's space making this the most common site of primary cholesteatoma.