Table 1.

Literature review of 127 reported metastases to parathyroid glands (listed in chronological publication order) [1–28]

Author	Date	Sex	Primary	Tumor type	Tumor-to-tumor metastasisa
Woolner et al. [9]	1958	F	Breast	Lobular carcinoma	Yes
Drickman et al. [10]	1961	M	Rectum	Adenocarcinoma
		F	Rectum	Adenocarcinoma
King et al. [11]	1964	F	Breast	Lobular carcinoma
Margolis et al. [12]	1969	F	Breast	Lobular carcinoma	Yes
Horwitz et al. [4]	1972	M	Lung	nr
		M	Stomach	nr
		F	Breast	nr
		F	Breast	nr
		F	Breast	nr
		F	Breast	nr
		F	Breast	nr
		F	Breast	nr
		F	Skin	Melanoma
		F	Breast	nr
		F	Thymus	Thymoma
		F	Breast	nr
		F	Skin	Melanoma
		M	Thigh	Spindle cell sarcoma
		F	Skin	Melanoma
		F	Salivary gland	Mucoepidermoid carcinoma
		M	Lung	nr
		F	Breast	nr
		F	Breast	nr
		F	Tongue	nr
		M	Skin	Melanoma
		F	Breast	nr
		M	Skin	Melanoma
		F	Breast	nr
		F	Breast	nr
		F	Breast	nr
		F	Breast	nr
		F	Breast	nr
		F	Breast	Lobular carcinoma
		F	Skin	Melanoma
		F	Breast	nr
		F	Breast	nr
		M	nr (Testis)	Carcinoma (? Seminoma)
		F	Skin	Melanoma
		M	Lung	nr
		M	Prostate	nr
		F	Breast	nr
		F	Anus	Melanoma
		F	Thigh	Rhabdomyosarcoma
		F	Breast	nr
		F	Breast	nr
		M	Kidney	Clear cell renal cell carcinoma
		F	Breast	nr
		F	Breast	nr
Borden et al. [13]	1976	M	Skin	Melanoma
Cifuentes et al. [14]	1979	F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
Schwartz et al. [15]	1982	F	Kidney	Clear cell renal carcinoma	Yes
de la Monte et al. [16]	1983	nr	nr	Melanoma
		nr	nr	Melanoma
		nr	nr	Melanoma
		nr	nr	Melanoma
		nr	nr	Melanoma
Watanabe et al. [17]		F	Breast	Ductal adenocarcinoma
de la Monte et al. [18]	1984	F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Lobular carcinoma
Inoshita et al. [1]	1985	M	Hard palate	Melanoma	Yes
Gattuso et al. [2]	1988	nr	Lung	Small cell carcinoma
		nr	Lung	Large cell carcinoma
Hermus et al. [19]		F	Breast	Mammary carcinoma
Goddard et al. [20]	1990	F	Breast	Lobular carcinoma
Benisovich et al. [21]	1991	F	Lung	Adenocarcinoma	Yes
Bumpers et al. [22]	1993	F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Ductal adenocarcinoma
		F	Breast	Lobular carcinoma
		F	Breast	Lobular carcinoma
		F	Breast	Lobular carcinoma
		F	Breast	Lobular carcinoma
		F	Breast	Lobular carcinoma
		F	Breast	Lobular carcinoma
		F	Breast	Lobular carcinoma
		F	Breast	Lobular carcinoma
Mariette et al. [23]		F	Breast	nr
Tang et al. [24]	2002	nr	Thyroid	Papillary thyroid carcinoma
		nr	Thyroid	Papillary thyroid carcinoma
Pazaitou-Panayiotou et al. [25]	2005	n/r	Thyroid	Differentiated thyroid carcinoma
Venkatraman et al. [26]	2006	F	Lung	Adenocarcinoma	PH
Fulciniti et al. [6]	2010	F	Breast	Ductal adenocarcinoma	Yes
Lee, HE et al. [7]	2011	M	Liver	Hepatocellular carcinoma	Yes
Chrisoulidou et al. [3]	2012	nr	Thyroid	Follicular thyroid carcinoma
Lee et al. [8]	2013	F	Breast	Ductal adenocarcinoma	PH
Shifrin et al. [5]		M	Thymus	Well differentiated neuroendocrine carcinoma	PH
Ofo et al. [27]	2014	M	Kidney	Clear cell renal cell carcinoma
Torregrossa et al. [28]	2016	M	Kidney	Clear cell renal cell carcinoma (intrathyroidal parathyroid gland)

^aPH parathyroid gland hyperplasia, nr not reported