This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
Laryngocele arises from herniation through 
Select and explain. 
A. Thyrohyoid membrane, B. Cricoepiglottic membrane, C. Thyroid membrane, D. Cricovocal membrane
A: Thyrohyoid membrane
Answer: A: Thyrohyoid membrane 
Explanation: Ans:A.)Thyrohyoid Membrane Laryngocele It is an air-filled cystic swelling due to dilatation of the saccule. Laryngoceles can be classified into three types: Internal - A laryngocele is defined as internal if the dilatation of Sacculeof the ventricle lies within the limits of the thyroid cailage. External - If the laryngocele extends beyond the thyroid cailage and protrudes through the thyrohyoid membrane producing a lateral neck mass, it is considered external. Combined - In which both internal and external components are seen.