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case_images: T2 weighted MRI at 1-month-old. The mass was multicystic and located near pharynx and parotid gland.
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case_images: Magnetic resonance imaging (MRI) revealed a multi-cystic mass located near the pharynx and parotid gland (Figure 1).
case_images: Short-tau inversion recovery (STIR) MRI at 5 years old. Majority of cystic components had shrinked. Hypo-intense structure beside the cyst (circle) was figured out to be calcification during operation later.
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case_images: MRI performed at that time revealed that the majority of the mass consisted of thick, wall-like tissue with a small cystic component (Figure 2).
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case_images: Intraoperative findings. The mass was smooth and located between parotid gland and sternocleidomastoid muscle. It was composed of cystic and solid components with bone- and tooth-like tissue, hair, and sebaceous sebum matter.
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case_images: On examination, it was composed of cystic and solid components, with bone- and tooth-like tissue, hair, and sebaceous sebum matter (Figure 3).
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case_images: Pathological findings. Pathological exam finds skin with accessory glands and adipose tissue, choroid tissue, anterior pituitary gland tissue. The pathological diagnosis is mature teratoma.
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case_images: On pathological examination, the mass contained choroid and anterior pituitary gland tissue, skin with accessory glands, and adipose tissue (Figure 4).