2677 results
Gouty arthritis of the shoulder joint

50 yo male presented with shoulder pain.

Note double contour sign at
of the shoulder joint ... deposition of crystal ... Shoulder #Clinical #POCUS ... #Ultrasound #Crystals
Acromioclavicular (AC) Joint Septic Arthritis on POCUS

IVDU with severe left shoulder pain.  Can fully range
Acromioclavicular (AC) Joint ... Septic Arthritis on POCUS ... 64K WBC with no crystals ... AC joint septic ... Arthritis #Effusion #POCUS
MTP Gout Effusion on POCUS
50s male with DM/HTN (no hx gout) and great toe pain-MTP joint.
Gout Effusion on POCUS ... great toe pain-MTP joint ... POCUS revealed joint ... effusion in 1st MTP joint ... MSU crystals=Gout
Approach to Joint Pain - Diagnostic Framework

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

1) Chronicity:
Approach to Joint ... 3) Number of Joints ... mycobacterial), RA, crystal ... culture, look for crystals ... psoriatic arthritis Crystals
Gout: Pathogenesis and Clinical Findings
 - Conditions of rapid cell turnover: hemolysis, psoriasis, lymphoproliferative disorders
 -
easily leaks into joints ... in a peripheral joint ... Neutrophils enter joint ... phagocytose the crystal ... Needle-shaped uric acid crystals
Arthrocentesis - Joint Fluid Analysis

Effusion Characteristics (Color, Clarity, WCC, PMN, Crystals, Bacteria) by Disease Process: 
OA,
Arthrocentesis - Joint ... Clarity, WCC, PMN, Crystals ... positively birefringent crystals ... negatively birefringent crystals ... Arthrocentesis #Joint
These are oxalate crystals, which look like little envelopes (or tetrahedrons, depending upon your point of
These are oxalate crystals ... depending upon your point ... Oxalate crystals ... Microscopy #Oxalate #Crystals
Joint Disorders - Differential Diagnosis Algorithm
Monoarthritis
 • Septic
 • Crystalline
     - Gout
Joint Disorders ... Gout - Uric Acid Crystals ... Pyrophosphate Dihydrate Crystals ... Lumbar Spine and SI Joints ... @AmyChung #Joint
CPPD vs Gout

== CPPD == 

Think About CPPD When:
 • Self-limited synovitis after surgery/trauma (> 65
swelling in weird joints ... Acute CPP Crystal ... MCP, or shoulder joints ... deposition in joints ... attacks • Other joints
Pseudogout: pathogenesis and clinical findings
 - Idiopathic (vast majority of cases) -> Mechanism unknown
 - Familial
dihydrate (CPPD) crystals ... from joints is ... x-ray - CPPD Crystals ... birefringent (crystals ... warm, swollen joint