case_images: PMC5881962_01
case_images: A tender, hard, midline anterior neck mass (circle) at the level of the hyoid bone.
case_images: 10.1177_2050313X18767050-fig1.jpg
case_images: PMC5881962_01_10.1177_2050313X18767050-fig1.jpg
case_images: fig1-2050313X18767050
case_images: On examination, he had a tender, hard midline anterior neck mass (6.0 x 4.0 x 4.0 cm) at the level of hyoid bone that elevated on swallowing (Figure 1).
case_images: (a) MRI T2-weighted sections in axial plane and (b) sagittal plane shows a lesion with mixed signals and no clear margins arising from notch thyroid and extend to midline tongue base.
case_images: 10.1177_2050313X18767050-fig2.jpg
case_images: PMC5881962_01_10.1177_2050313X18767050-fig2.jpg
case_images: fig2-2050313X18767050
case_images: The lesion appeared to arise from notch thyroid and extend to midline tongue base (Figure 2).
case_images: The excised mass that was found to adhere to the hyoid bone and surrounding muscles.
case_images: 10.1177_2050313X18767050-fig3.jpg
case_images: PMC5881962_01_10.1177_2050313X18767050-fig3.jpg
case_images: fig3-2050313X18767050
case_images: Grossly, the mass (6.0 x 4.0 x 4.0 cm) composed of chief solid lesion with partial cystic lesion adhering to hyoid bone and surrounding muscles (Figure 3).
case_images: (a) Histopathological image of the mass specimen demonstrating the fibrous stroma with invasive nests of atypical squamous cells (H&E, x20). Immunohistochemically, positivity for (b) CKpan, (c) 34bE12 and (d) p40 was observed in the invasive tumor nests confirming squamous cell carcinoma (x20).
case_images: 10.1177_2050313X18767050-fig4.jpg
case_images: PMC5881962_01_10.1177_2050313X18767050-fig4.jpg
case_images: fig4-2050313X18767050
case_images: Microscopically, the mass presented numerous differentiated malignant squamous cells (Figure 4).
case_images: No regional or distant metastasis was revealed by PET scan.
case_images: 10.1177_2050313X18767050-fig5.jpg
case_images: PMC5881962_01_10.1177_2050313X18767050-fig5.jpg
case_images: fig5-2050313X18767050
case_images: Whole body positron emission tomography (PET) scanning did not reveal any regional or distant metastatic diseases (Figure 5).