D75: Other diseases of blood and blood-forming organs

The group of conditions referred to as "Other diseases of blood and blood-forming organs" includes various illnesses that involve the blood and the organs responsible for producing blood. The conditions within this group can occur due to multiple causes - from genetic disorders, exposure to harmful substances like chemicals or radiation, viruses, and even the body's immune system attacking its own cells. These diseases often cause disruptions in the production, function, or quantity of blood cells, which can lead to symptoms such as fatigue, shortness of breath, abnormal bleeding or bruising, and increased susceptibility to infections. The diseases might progress gradually or rapidly, depending on the specific condition and its severity. The main systems affected by these conditions are the hematologic system, which includes the bone marrow, blood, spleen, and lymph nodes, and the immune system.