Iatrogenic Kaposi's Sarcoma (KS) is a form of cancer that develops as a complication of medical treatment, particularly in individuals who have undergone organ transplantation. It is caused by the human herpesvirus 8 (HHV-8) and manifests in patients with compromised immune systems. The condition is characterized by the formation of vascular tumors and can vary in severity from isolated skin lesions to widespread systemic involvement.