R70-R79: Abnormal findings on examination of blood, without diagnosis

R76: Other abnormal immunological findings in serum

The group of conditions known as "Other abnormal immunological findings in serum" refers to irregularities detected in the immune response of a patient, as measured in serum — the portion of the blood that includes both proteins and antibodies. These abnormalities might point to an impaired immune function or a potential overactive immune response which can lead to different diseases. They can be caused by a variety of factors, ranging from genetic predispositions to infections to environmental triggers. Common symptoms associated with these conditions can vary, but often include fatigue, recurrent infections, inflammation and potentially allergic reactions. The progression of these conditions is highly variable, influenced by factors such as the specific type of irregularity and the individual's overall health. The immune system, which is involved in protecting the body against disease, is the primary system affected in these conditions.