Table 2.

Studies involving the relationship between local recurrence and pulmonary metastasis of GCTB

Study (Author/year)	Number of patients	Number of patients with pulmonary metastasis	Local recurrence
Kremen et al. 2012 [33]	230	5	28
Klenke et al. 2011 [35]	118	5	24
Errani et al. 2010 [32]	349	14	52
Prosser et al. 2005 [40]	137	22	26
Trieb et al. 2001 [42]	47	0	11
Blackley et al. 1999 [43]	59	10	12
Kay et al. 1994 [45]	66	6	18
O’Donnell et al. 1994 [44]	60	0	15
Viswanathan et al. 2010 [36]	470	8	13 of 24 patients with lung metastasis
Tubb et al. 1992 [48]			7 of 13 patients with lung metastasis
Goldenberg et al. 1970 [28]	218	6	5 of 6 patients with lung metastasis