Medical Conditions Terminology in Category L


Low Back Aches

Acute or chronic pain in the lumbar or sacral regions, which may be associated with musculo-ligamentous SPRAINS AND STRAINS; INTERVERTEBRAL DISK DISPLACEMENT; and other conditions.

LSD 25

Semisynthetic derivative of ergot (Claviceps purpurea). It has complex effects on serotonergic systems including antagonism at some peripheral serotonin receptors, both agonist and antagonist actions at central nervous system serotonin receptors, and possibly effects on serotonin turnover. It is a potent hallucinogen, but the mechanisms of that effect are not well understood.

Lobar Pneumonia

A febrile disease caused by STREPTOCOCCUS PNEUMONIAE. This condition is characterized by inflammation of one or more lobes of the lungs and symptoms include chills, fever, rapid breathing, and cough.


Low Density Lipoprotein Receptor-Related Protein

A LDL-receptor related protein involved in clearance of chylomicron remnants and of activated ALPHA-MACROGLOBULINS from plasma.

L Selectin

Cell adhesion molecule and CD antigen that serves as a homing receptor for lymphocytes to lymph node high endothelial venules.

L isomer Tyrosine

A non-essential amino acid. In animals it is synthesized from PHENYLALANINE. It is also the precursor of EPINEPHRINE, THYROID HORMONES, and melanin.

L Isomer Rhamnose

A methylpentose whose L- isomer is found naturally in many plant glycosides and some gram-negative bacterial lipopolysaccharides.

L Isomer Phenylalanine

An essential aromatic amino acid that is a precursor of MELANIN, DOPAMINE, noradrenalin (NOREPINEPHRINE), and THYROXINE.

L Isomer Norleucine

An unnatural amino acid that is used experimentally to study protein structure and function. It is structurally similar to METHIONINE, however it does not contain SULFUR.

Lateral Medullary Syndromes

Infarction of the dorsolateral aspect of the medulla due to occlusion of the vertebral artery and/or the posterior inferior cerebellar artery. Clinical manifestations vary with the size of infarction, but may include loss of pain and temperature sensation in the ipsilateral face and contralateral body below the chin; ipsilateral HORNER SYNDROME; ipsilateral ATAXIA; DYSARTHRIA; VERTIGO; nausea, hiccup; dysphagia; and VOCAL CORD PARALYSIS. (From Adams et al., Principles of Neurology, 6th ed, p801)