15 results
Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
- Septic Arthritis ... (1%) - Watch out ... : - Gout - Pseudo ... gout - Osteoarthritis ... #diagnosis #msk
Arthrocentesis - Joint Fluid Analysis

Effusion Characteristics (Color, Clarity, WCC, PMN, Crystals, Bacteria) by Disease Process: 
OA,
Fluid Analysis Effusion ... birefringent crystals), Gout ... , Septic arthritis ... #Diagnosis #Differential ... Syonvial #Fluid #Effusion
Joint Disorders - Differential Diagnosis Algorithm
Monoarthritis
 • Septic
 • Crystalline
     - Gout
Monoarthritis • Septic ... Crystalline - Gout ... “Bamboo Spine” Fusion ... Erythematosus (SLE), should ... Joint #Disorders #msk
Gout (Gouty Arthritis) - MSK Radiology
Imaging Findings:
 • Eccentric soft-tissue densities surrounding the third proximal interphalangeal
Gout (Gouty Arthritis ... • This case should ... • Gout can present ... Differential diagnosis ... #Gouty #Arthritis
Arthrocentesis of synovial fluid - Interpretation
 - Normal
 - Noninflammatory	
 - Inflammatory	
 - Septic

Viscosity of synovial
does not rule out ... septic arthritis ... 50,000 #Diagnosis #Differential ... Syonvial #Fluid #Effusion ... #Infective #Arthritis
Approach to Joint Pain - Arthritis Differential Diagnosis Framework

Inflammatory Versus Noninflammatory Pain
 • Is it inflammatory
axial (spine, shoulders ... Very hard to get out ... Crystal induced (Gout ... fever • Lyme • Gout ... #Diagnosis #MSK
Acromioclavicular (AC) Joint Septic Arthritis on POCUS

IVDU with severe left shoulder pain.  Can fully range
with severe left shoulder ... Tender on top of shoulder ... #Arthritis #Effusion ... POCUS #clinical #ultrasound ... #MSK
Knee Effusions - Arthrocentesis Interpretation

Inflammatory arthritis:
 • Color: Yellow-> Green
 • Clarity: Opaque
 • Viscosity: Low
Knee Effusions - ... Inflammatory arthritis ... Culture: Negative Septic ... analysis: • MSU ... : Gout • CPPD:
MTP Septic arthritis due to non-tuberculous mycobacterium without effusion
We had an immunosuppressed patient with a concerning
MTP Septic arthritis ... History of gout. ... Clinically no effusion ... 1) even with gout ... ultrasound can help
Approach to Joint Pain - Diagnostic Framework

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

1) Chronicity:
, gout or pseudogout ... Spondyloarthropathies, gout ... Parallel, yellow = gout ... #Joint #Pain #MSK ... approach #workup #differential