Current Strategies of Endocrine Therapy in Elderly Patients with Breast Cancer

Table 1

Classification of aromatase inhibitors.

	1st generation	2nd generation	3rd generation
Steroidal (type 1)		Formestane	Exemestane
Nonsteroidal (type 2)	Aminoglutethimide	Fadrozole	Letrozole
			Anastrozole
			Vorozole