Final answer:
True, decubitus ulcers are commonly called bedsores; they result from prolonged pressure that leads to tissue death and can be fatal if infected.
Step-by-step explanation:
Decubitus ulcers, which are indeed commonly called bedsores, occur when there is constant, unrelieved pressure on bony areas of the body, leading to reduced blood flow and necrosis (tissue death). They are particularly prevalent in individuals who are immobile, such as elderly patients with debilitating conditions. In healthcare settings, it is standard practice to turn patients regularly to prevent the occurrence of bedsores. If these ulcers are not treated properly, including the removal of necrotized tissue, they can become infected and potentially fatal conditions like gas gangrene may emerge, particularly in patients with other underlying conditions such as diabetes.