Table 4.

Alterations in mtDNA content of human cancers.

Cancer type Case number	Alterations in mtDNA content		Reference
	Increase or Decrease	Frequency (%)
Breast cancer
N = 25	Decrease	80	[76]
N = 60	Decrease	63	[26]
N = 59	Decrease	78	[27]
Gastric cancer
N = 31	Decrease	55	[35]
Hepatocellular carcinoma
N = 38	Decrease	61	[39]
N = 31	Decrease	77	[77]
Renal cancer
N = 13	Decrease	61	[78]
N = 37	Decrease	91	[79]
Colorectal cancer
N = 25	Increase	40	[29]
N = 153	Increase	39	[80]
Lung cancer
N = 31	Increase	48	[29]
Papillary thyroid cancer
N = 20	Increase	65	[76]
Prostate cancer
N = 9	Increase	78	[81]