Lambert-Eaton myasthenic syndrome (LEMS) causes muscle weakness, usually first in the upper legs and upper arms. The attack interferes with the ability of nerves to send signals to muscles. A progressive syndrome it develops into eye muscles, and those involved in talking, chewing; sometimes dry mouth, constipation, impotence and bladder urgency. Lambert-Eaton Myasthenic Syndrome
Lichen planus is a rare, chronic, inflammatory autoimmune skin and mucous membrane disease. It most commonly presents as itchy, shiny, reddish-purple spots (lesions) on the skin. NORD
Linear IgA disease DermNet NZ
Lupus - see Systemic lupus erythematosus
M
Meniere's Disease has a group of inner ear symptoms, including tinnitus (ringing in the ears), vertigo (dizziness), and a sensation of fullness or pressure in the ears possibly with hearing loss. Meniere's Disease Australia
Mixed connective tissue disease or MCTD causes joint pain, muscle weakness, cardiac, lung and skin manifestations, kidney disease, and dysfunction of the oesophagus Mayo Clinicmerck manuals
Monoclonal Gammopathy means abnormal levels of a protein have been found in the blood Mayo Clinic
Neuromyotonia or Isaac's syndrome has stiffness and cramping in the limbs, involuntary twitching of the muscles, muscles not relaxing even during sleep and fatigue. Medilnks
Neutropenia see Autoimmune Neutropenia
O
Oophoritis - this is not a mis-spelling - it is inflammation of ovariesresulting in the destruction of the ovaries and a loss of fertility.Johns Hopkins University School of Medicine
Opsoclonus-myoclonus syndrome causes unsteady gait, muscle spasms and irregular eye movements. Difficulty speaking may also be involved. Often seen in children less than 2 years old omsusaNINDS
orchitis is an inflammation of the testis with mild testicular pain or swelling, resulting in infertility. Johns Hopkins Autoimmune Disease Research Centre