11 results
Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
Causes of Knee Effusions ... Fever/Chills/Joint ... pain/Night sweats ... Reactive Syndrome - Acute ... differential #diagnosis #msk
Acute Joint Pain - Vitamin CD Mnemonic
Vascular
Infectious
Trauma - Multiple injury sites, Open Fracture, Infectious joint pain
Autoimmune
Acute Joint Pain ... - See inflammatory ... joint pain Metabolic ... #JointPain #VitaminCD ... #Mnemonic #MSK
Distinguishing between Inflammatory and Degenerative joint disease
Inflammatory Joint Disease
 • Swelling stimulates joint nociceptors -> Pain
nociceptors -> Pain ... commonly affects the knee ... hip and L/C-spine ... Comparison #Versus #MSK ... #JointDisease #JointPain
Approach to Joint Pain - Arthritis Differential Diagnosis Framework

Inflammatory Versus Noninflammatory Pain
 • Is it inflammatory
Approach to Joint ... the time course (acute ... spine, shoulders, hips ... Gram-negative bacilli ... #Diagnosis #MSK
Inflammatory Joint Pain - Differential Diagnosis Algorithm 
Monoarticular
 • Gout (Podagra, Tophi)
 • Pseudogout
 • Early
Inflammatory Joint ... Pain - Differential ... Inflammatory Bowel ... Rheumatic Fever Acute ... #JointPain #MSK
Infectious Joint Pain - Differential Diagnosis Algorithm 
Polyarticular Join Pain
 • Viral Myalgia
 • Viral Arthritis
Infectious Joint ... Pain - Differential ... Articular - Acute ... #Infectious #JointPain ... #MSK #Differential
Approach to Joint Pain - Diagnostic Framework

1) Chronicity
2) Inflammatory vs Non-Inflammatory
3) Number of Joints Involved

1) Chronicity:
Pain - Diagnostic ... Chronicity: • Acute ... • Acute = Viral ... - parvovirus, HIV ... #Joint #Pain #MSK
Rheumatoid Arthritis Summary
Overview: chronic, inflammatory symmetric polyarthritis involving small joints of hands/feet, knees, shoulders
Signs & Symptoms:
Overview: chronic, inflammatory ... of hands/feet, knees ... ) • joint pain ... effusions, reduced ... ideally limit for acute
Approach to Joint Pain

History:
Is the pain from:
	• Joint
	• Adjacent bursa
	• Tendon
	• Ligament
	• Bone
	• Muscle
	• Referred from
differentiated: • Inflammatory ... and many other inflammatory ... Arthritis: • Acute ... e.g., congenital hip ... #Pain #MSK #rheumatology
Rheumatoid arthritis (RA): Pathogenesis and Joint diseases features
 • RA affects 1% of population, women >
pain, swelling, ... • Non-specific Acute-phase ... pain), especially ... • Rate of inflammatory ... effusion (Swelling