Chart 2.

Type of skin lesion evaluated according to each study using topical and/or systemic retinoids

Skin lesions	Author (year)	Retinoids
AK/SCC	Kelly (1991)26	Etretinate; acitretin; acitretin
	Bavinck (1994)27
	De Sevaux (2003)28
AK / BCC	Bollag (1970)29; Hughes (1998)30	Tretinoin etretinate
AK / warts	Euvrard (1992)31	Tretinoin
AK / warts/SCC	Rook (1995)25	Tretinoin x etretinate + tretinoin
AK / BCC/SCC	Majewski (1994),32 Yuan (1995)33 Euvrard (1998),34 George (2002),35 McNamara(2002)36	Isotretinoin + calcitriol acitretin; adapalene; acitretin; acitretin
AK / warts/BCC/SCC	Shuttleworth (1988),37 McKenna (1999)38	Etretinate; acitretin
AK alone	Moriarty (1982),18 Kligman (1991),39 Misiewicz (1991),40 Alizerai (1994),41 Moglia (1997),42 Campanelli (2002),43 Smit (2002),44 Smit (2004)45	Etretinate; tretinoin 0.05%; Ro-14-9706 x tretinoin 0.05%; isotretinoin 0.1%; retinoid fenretinide; retinaldehyde 0.05%; tretinoin 0.02% x calcipotriol; acitretin