Generate an image of a medical cross fused with a skull, symbolizing death and disease. The medical cross should be depicted as a traditional symbol of healthcare, resembling a plus sign with arms of equal length. It should be seamlessly integrated with the skull, with the cross serving as the structure of the skull's cranium and the arms of the cross extending outward from the sides of the skull. The skull should be portrayed with anatomical accuracy, with empty eye sockets, nasal cavity, and teeth, conveying a sense of mortality and morbidity. Surrounding the fusion of the medical cross and skull, there should be an atmosphere of darkness and foreboding, enhancing the macabre nature of the image. Utilize lighting and composition techniques to highlight the contrast between the medical cross and the skull, creating a visually striking and unsettling representation of death and disease. The image should evoke feelings of contemplation and unease, exploring the inherent connection between medicine and mortality.