Relationship between cancers and stress?

  Order Description   Define Cancer , Main Mechanism of Cancer Main causes of cellular cancer Type of cancer ........................... -What is stress ? -Type of stress -Organs that affected by stress -Mechanism of stress development and the effect of stress at a cellular basis -How does stress correlates to development of cancerous process at a cellular basis? ............... You need to mention some previous accurate studies about the relation between stress and cancer or the relation between stress and the development of cancerous processes at a specific organ