A 62-year-old male presents with a rapidly growing, painful mass in the parotid region. Histological evaluation shows a high-grade carcinoma with solid growth patterns and central necrosis. Immunohistochemistry reveals overexpression of HER2, and the tumor is positive for androgen receptor (AR) and shows mutations in TP53. What is the most likely diagnosis?

A 45-year-old male presents with a painless swelling in the parotid gland that has progressively enlarged over the past 6 months. Fine needle aspiration reveals a cellular tumor with abundant eosinophilic cytoplasm and microcystic spaces. Immunohistochemistry shows strong positivity for S-100, pan- TRK and mammaglobin, but negative for androgen receptor (AR). Based on this information and image below, which tumor type is the most likely diagnosis?

A 48-year-old female presents with a painless, slowly growing mass in the submandibular gland. Fine-needle aspiration and histopathological examination reveal small, microglandular structures with clear cytoplasm. Immunohistochemical staining is positive for SOX10 and S100. Genetic testing identifies a MEF2C-SS18 gene fusion. Which of the following microscopic images corresponds to this diagnosis?