PMC10206046_01
Preoperative photo of the tumor anteriorly (A) and laterally (B).
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F1
The size of the mass was 5 x 4 cm (Figure 1).
Preoperative contrast-enhanced ultrasonography of the patient. (A) Gray scale ultrasonography of the mass. (B) Color Doppler imaging of the mass. (C, D) Contrast-enhanced ultrasonography of the tumor.
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F2
The mass was classified as TI-RADS 3 (Figure 2).
Preoperative CT scan of the patient. (A) Plain CT of the neck (horizontal plane). (B) CT scan of the neck (coronal plane). (C, D) Contrast-enhanced CT of the neck (horizontal plane).
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F3
The CT could not establish a confirmed diagnosis but a low-grade tumor could not be ruled out (Figure 3).
Histopathology examination and FISH of the patient. (A) Microscopic images showing biphasic tumor (H&E x 100). (B) Microscopic images showing pathological mitotic (Black arrow, H&E x 400). (C) Microscopic images showing the tumor invasion to adipose tissue (H&E x 100). (D) Immunohistochemistry positive to Ki-67 (H&E x 100). (E) Immunohistochemistry positive to Vim (H&E x 100). (F) Immunohistochemistry positive to TLE1 (H&E x 100). (G) Immunohistochemistry positive to Bcl-2 (H&E x 100). (H) Fluorescence in situ hybridization (FISH) break-apart probe confirmed SS18 gene rearrangement (split red and green signal).
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F4
There was no metastasis in the central cervical lymph nodes (0/6) (Figure 4).