case_images: PMC11260664_01
case_images: Images (A-D) show the pathological pictures of the left axillary lymph node biopsy. Images (E, F) show the pathological pictures of the thyroid biopsy.
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case_images: Figures 1A-D ). Fine-needle aspiration of the left axillary lymph nodes indicated metastatic squamous cell carcinoma, Immunohistochemistry results indicate: PCK (+), P40 (+), P63 (+), CD56 (+), PAX-8 (-), Subsequently, the patient underwent fine-needle aspiration biopsy of the thyroid ( Figures 1E, F ), which revealed cancer cells with immunohistochemistry positive for P40.
case_images: Whole-body imaging (A) revealed multiple areas of increased FDG metabolism in the thyroid region (arrow), neck, and abdomen. The axial and coronal images (B, C), axial and coronal view of PET; (D, E), axial and coronal view of CT; (F, G), axial and coronal view of fusion images) showed a mass in the thyroid with increased FDG metabolism [(B-G), arrow].
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case_images: The PET/CT images showed a heterogeneous mass in the thyroid with significantly increased FDG uptake ( Figures 2A-G , arrow), with an SUVmax of 10.0.