11 results
Joint Disorders - Differential Diagnosis Algorithm
Monoarthritis
 • Septic
 • Crystalline
     - Gout
Monoarthritis • Septic ... Crystalline - Gout ... • Psoriatic arthritis ... Erythematosus (SLE), should ... Joint #Disorders #msk
Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
Knee Effusions - Septic ... (1%) - Watch out ... Effusions: - Gout ... - Pseudo gout ... differential #diagnosis #msk
Acromioclavicular (AC) Joint Septic Arthritis on POCUS

IVDU with severe left shoulder pain.  Can fully range
Acromioclavicular (AC) Joint Septic ... AC joint septic ... AC joint septic ... POCUS #clinical #ultrasound ... #MSK
MTP Septic arthritis due to non-tuberculous mycobacterium without effusion
We had an immunosuppressed patient with a concerning
MTP Septic arthritis ... History of gout. ... But concern for septic ... 1) even with gout ... , worry about septic
Knee Effusions - Arthrocentesis Interpretation

Inflammatory arthritis:
 • Color: Yellow-> Green
 • Clarity: Opaque
 • Viscosity: Low
Inflammatory arthritis ... Culture: Negative Septic ... analysis: • MSU ... : Gout • CPPD: ... Interpretation #diagnosis #septic
Approach to Joint Pain - Diagnostic Framework

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

1) Chronicity:
(1 joint): • Septic ... , gout or pseudogout ... • WBC >20k: Septic ... Spondyloarthropathies, gout ... Parallel, yellow = gout
Purulent Ankle Joint on POCUS
Young patient 2 weeks status post ORIF of ankle fracture presents with
flowing in and out ... found to have septic ... arthritis and osteomyelitis ... POCUS #clinical #ultrasound ... #msk #infected
Leg Pain - Differential Diagnosis Framework

Bone/Joint Causes of Leg Pain:
 • Fracture
 • Arthritis
 • Gout/pseudogout
• Fracture • Arthritis ... • Gout/pseudogout ... pain syndrome • Arthritis ... Poikilothermia • Septic ... lower #extremity #msk
TISSUE APPEARANCES ON 
MUSCULOSKELETAL ULTRASOUND 

Bone:
 
Bone is represented as a very bright structure and appears
MUSCULOSKELETAL ULTRASOUND ... to fibroadipose septa ... honeycomb’ or ‘pepper pot ... interrogation as it should ... MUSCULOSKELETAL #MSK
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
Diseases • Septic ... arthritis - Gram ... synovial fluid • Gout ... urate crystals (gout ... ANAs RF test should