Background:
Majority of cutaneous squamous cell carcinoma (cSCC) originate in the head and neck region, with 1-3% have been found to have parotid or periparotid lymph nodes metastases. The significance of secondary parotid metastases from cSCC lies in its propensity of cervical lymph node spread and distant metastases leading to a dismal prognosis, and therefore the importance of early diagnosis and prompt treatment.
Case description:
An 85-year-old gentleman with prior history of right temporal squamous cell carcinoma (SCC) presented with a new onset left cheek cSCC. He underwent complete excision with clear margin. Four months following initial surgery, he developed ulcerative mass at left angle of mandible. CT scan revealed an underlying left parotid gland tumor, which was confirmed to be SCC by fine needle aspiration cytology (FNAC). He was then surgically treated with nerve-sparing total parotidectomy, modified radical neck dissection, soft tissue reconstruction using free anterolateral thigh fasciocutaneous flap and adjuvant radiotherapy with satisfactory outcomes.
Conclusions:
Although rare, metastatic cutaneous SCC to parotid gland represents a unique group of locally advanced cutaneous SCC. Multimodal treatment approach consisting of total parotidectomy, ipsilateral neck dissection and adjuvant radiotherapy has been shown to improve the locoregional control of the disease and limit the propensity to distant metastasis.