Introduction: Cypermethrin (CYP) is a synthetic pyrethroid used as a pesticide.It induces toxicity of different organs.Hydroxytyrosol (HT) can protect against oxidant-induced toxicity and promote programmed apoptosis counteracting cellular infiltration. Aim of the Work:The present study aimed to assess the CYP-induced histological, immunohistochemical and biochemical changes in rat lungs and to cl...