Parotid metastasis from carcinoma urinary bladder treated with CyberKnife-based stereotactic body radiotherapy: case report and review of literature

Abstract

Metastases to the parotid region are relatively infrequent and originate primarily from head and neck cancer. Metastases of an infraclavicular origin are uncommon. Moreover, metastasis from the carcinoma of urinary bladder (CUB) to any part of the head and neck, including parotid gland, is rare. Surgery and chemotherapy are usually offered. We report a case of solitary parotid metastasis from CUB, who was successfully treated with stereotactic body radiotherapy (SBRT) using CyberKnife. SBRT is a safe alternative in cases unwilling/ unfit for surgery.

Nested variant of urothelial carcinoma metastatic to the parotid gland

“…No FNA was performed for diagnosis in their report. Kataria et al also published another example of UC metastasis to the parotid gland with very similar clinical features to our case. The first metastatic site in their case was the parotid and there was no cervical lymphadenopathy, like our case.…”

“…We could find only two cases of parotid metastasis from urothelial carcinoma (UC) of the bladder published in the English literature. 2,3 Here, we present an example of a nested variant of UC (NVUC) metastasis to the parotid with welldocumented cyto-and histomorphological features.…”

“…Parotid gland metastasis from UC of the bladder is extremely rare . Detailed clinicopathological features of these reported cases are summarised in the Table .…”