Chronic inflammatory demyelinating polyneuropathy (CIDP) is an autoimmune disorder characterised by progressive weakness and sensory loss due to the immune-mediated destruction of myelin in peripheral nerves. It is clinically significant as it can lead to significant disability if untreated, often requiring immunotherapy for management. A key association is its potential link to other autoimmune conditions, such as lupus or rheumatoid arthritis, highlighting the need for comprehensive evaluation.