Table 2.

Primary sites of 127 reported malignancies metastatic to the parathyroid glands

Primary site	Number of cases
Breast (adenocarcinoma)	85
Skin melanoma	13
Lung (adenocarcinoma and neuroendocrine carcinomas)	7
Unknown	6
Thyroid carcinoma (differentiated)	4
Kidney clear cell renal cell carcinoma	4
Thymic tumors	2
Soft tissue sarcoma (thigh)	2
Rectum adenocarcinoma	2
Liver hepatocellular carcinoma	1
Hard palate melanoma	1
Stomach adenocarcinoma	1
Salivary gland (mucoepidermoid carcinoma)	1
Tongue	1
Prostate adenocarcinoma	1
Anus melanoma	1