case_images: PMC11070531_01
case_images: Combined magnetic resonance imaging (MRI) findings: (A) coronal T2-weighted imaging (T2WI) fat-suppressed sequence showing a high signal intensity mass. (B) Coronal T1-weighted imaging (T1WI) sequence displaying a low signal intensity mass. (C) Transverse T2WI fat-suppressed sequence revealing a high signal intensity mass. (D) Diffusion-weighted imaging (DWI) sequence indicating a signal in the mass. (E) Apparent diffusion coefficient (ADC) sequence showing a low signal intensity in the tumor. (F,G) Contrast-enhanced scans depicting the mass with evident heterogeneous enhancement.
case_images: fsurg-11-1367059-g001.jpg
case_images: PMC11070531_01_fsurg-11-1367059-g001.jpg
case_images: F1
case_images: T2 hypointense signal was observed internally, and no significant enhancement was seen in the cystic area after contrast enhancement. The diagnosis was a benign lesion. (Figure 1).
case_images: Pathological findings: (A) gross view of the tumor under low magnification. (B) Under medium magnification, epithelioid tumor cells were distributed in patches, with cytoplasm rich in acid. Intracytoplasmic vacuoles were visible in some tumor cells, and obvious interstitial vitreous changes were noted. (C) At high magnification, tumor cells exhibited rich cytoplasm, eosinophilic appearance, vesicular nucleus, inconspicuous nucleoli, no observed nuclear division image, and arrangement in small nests.
case_images: fsurg-11-1367059-g002.jpg
case_images: PMC11070531_01_fsurg-11-1367059-g002.jpg
case_images: F2
case_images: The surgical pathology report indicated a low-grade malignant spindle and epithelioid cell tumor in the right parotid gland (Figure 2).
case_images: Immunohistochemistry pictures: formalin-fixed paraffin-embedded (FFPE) sections from the tumor were assessed by IHC. Representative images of P63, Calponin, CD34, ErG, and Ki-67 expression staining are shown.
case_images: fsurg-11-1367059-g003.jpg
case_images: PMC11070531_01_fsurg-11-1367059-g003.jpg
case_images: F3
case_images: HHV8 staining was negative (Figure 3).