00:00 / 00:00
Lordosis, kyphosis, and scoliosis
Osteomalacia and rickets
Paget disease of bone
Calcium pyrophosphate deposition disease (pseudogout)
Juvenile idiopathic arthritis
Inclusion body myopathy
Degenerative disc disease
Spinal disc herniation
Achilles tendon rupture
Anterior cruciate ligament injury
Iliotibial band syndrome
Patellar tendon rupture
Patellofemoral pain syndrome
Carpal tunnel syndrome
Thoracic outlet syndrome
Radial head subluxation (Nursemaid elbow)
Rotator cuff tear
Lambert-Eaton myasthenic syndrome
Limited systemic sclerosis (CREST syndrome)
Mixed connective tissue disease
Systemic lupus erythematosus
Developmental dysplasia of the hip
Osgood-Schlatter disease (traction apophysitis)
Slipped capital femoral epiphysis
Back pain: Pathology review
Bone disorders: Pathology review
Bone tumors: Pathology review
Gout and pseudogout: Pathology review
Muscular dystrophies and mitochondrial myopathies: Pathology review
Myalgias and myositis: Pathology review
Neuromuscular junction disorders: Pathology review
Pediatric musculoskeletal disorders: Pathology review
Rheumatoid arthritis and osteoarthritis: Pathology review
Scleroderma: Pathology review
Seronegative and septic arthritis: Pathology review
Sjogren syndrome: Pathology review
Systemic lupus erythematosus (SLE): Pathology review
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Living with Lupus - Patient Documentary
Systemic Lupus Erythematosus (SLE) Diagnosis and Clinical Features
Systemic Lupus Erythematosus (SLE) Mechanism, Treatment and Complications
Autoimmune Disease: Overview & Systemic Lupus Erythematosus (SLE)
lupus p. 476
anemia of chronic disease and p. 427
autoimmune hemolytic anemia and p. 415
azathioprine for p. 443
drug-induced p. 113
isoniazid p. 194
lab/findings p. 731
lymphopenia p. 429
microangiopathic anemia p. 415
neutropenia p. 429
presentation p. 726
α-methyldopa p. 242
hydralazine p. 323
procainamide p. 326
drug-induced lupus p. 249
lupus pernio p. 697
acute interstitial nephritis p. 622
autoantibodies p. 113
DPGN p. 618
HLA subtypes p. 98
kidney disease with p. 614, 618, 622
Raynaud phenomenon p. 479
Alright, “systemic lupus erythematosus,” k we totally got this. “Systemic” is easy, and refers to affecting multiple organs in the body.
“Erythematosus” means reddening of the skin, alright alright.
“Lupus” is latin for “wolf”. So affects multiple organs wolf...reddening of the skin?
Not exactly, the modern use of lupus usually refers to a variety of diseases that affect the skin...which was possibly originally used since these diseases resemble a wolf bite on the patients’ skin.
Is that true? Who knows. At any rate, systemic lupus erythematosus, or SLE, sometimes just lupus, is a disease that’s systemic, and affects a wide variety of organs, but notably often causes red lesions on the skin.
But how does lupus affect all these organs? Well usually the immune system protects the body’s tissues from invaders, but lupus is an autoimmune disease, which means that immune cells start attacking the very tissues their supposed to protect.
With lupus, essentially any tissue or organ can be targeted.
And just like a ton of other autoimmune diseases though, it’s not completely clear why it develops, and like most diseases it’s the result of both genetics and the environment.
Alright so let’s go over a specific scenario to show how this plays out.
Let’s say this guy has susceptibility genes—genes that make him susceptible to getting lupus, and he’s exposed to UV radiation in sunlight, which we know is an environmental risk factor for lupus.
Well, given enough UV rays, think like sunburn, the cell’s DNA can become so badly damaged, that the cell undergoes programmed cell death, or apoptosis, and it dies.
This produces all these little apoptotic bodies, and exposes the insides of the cell, including parts of the nucleus, like DNA, histones, and other proteins, to the rest of the body.
Well those susceptibility genes specifically have an effect on this person’s immune system such that their immune cells are more likely to think that these are foreign, or antigens, and since they’re from the nucleus, we call them nuclear antigens, and immune cells try to attack them.
Systemic lupus erythematosus (SLE) is a systemic autoimmune disease in which the body's immune system mistakenly attacks healthy tissue. SLE most often harms the heart, joints, skin, lungs, blood vessels, liver, kidneys, and nervous system. Common symptoms of SLE can include fatigue, joint pain, rash, fever, and anemia. The course of the disease is unpredictable, with periods of illness (called flare-ups) alternating with remissions. Treatment typically involves medications to manage symptoms, reduce inflammation, and suppress the immune system.
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