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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
Pyriform sinus is laterally bounded by what?
assistant
The correct answer is  On either side of the laryngeal orifice in humans is a recess, termed the piriform sinus (also piriformrecess, pyriform sinus, piriform fossa, or smuggler's fossa), which is bounded medially by the aryepiglottic fold, laterally by the thyroid cailage and thyrohyoid membrane. The fossae are involved in speech.