Cystic teratoma of the parotid gland: A case report

Figure 1 Axial-view contrast-enhanced computed tomography image. The mass was located in the deep lobe of the left parotid gland. The medial part extended to the parapharyngeal space. Eggshell-like calcification was observed in the cyst wall. The cyst components were in different density, including a large amount of fat and a small number of keratinized substances.

Figure 2 Magnetic resonance imaging images. A: T1W1 axial view; B: Coronal view of fat-saturated sequence in T2WI; C: T1W1 enhancement. The lesion had a complete capsule and presented as short T1 and long T2 signals, combined with medium T1 and T2 signals and line-like short T2 separation. It had a complete capsule showing low signal in the fat saturation sequence. It was accompanied by fat-liquid level, which was not significantly enhanced on enhanced magnetic resonance imaging.

Figure 3 Histopathological analysis of the teratoma. A and B: The cyst wall was lined with a stratified squamous epithelium. Hyaline cartilage, sebaceous glands, and fat tissue were seen in the fibrous capsule wall (HE × 50).