[Diagnostic assessment in lumbar back pain. I. Anamnesis and clinical examination].

The diagnostic assessment of the low back pain patient is often unsatisfactory because a clear morphological alteration explaining the patient's symptoms can only be found in 10-20% of the cases. The majority of the patients is suffering from non-specific low back pain. However, the high incidence of benign, self-limiting low back pain leads to the risk of overlooking specific causes such as tumor or infection. Similarly, relevant paresis and bladder and bowel dysfunction must be diagnosed in time. Furthermore, the aim of the diagnostic work-up is to diagnose and treat specific causes of back and leg pain (e.g. disc herniation and spinal stenosis) to avoid chronicity. In the majority of the cases, history and clinical examination alone allow to differentiate between specific and non-specific low back pain and may lead to a further diagnostic work-up by imaging studies.