685 results
Approach to Joint Pain - Diagnostic Framework

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

1) Chronicity:
Approach to Joint ... mycobacterial), RA, crystal ... Number of Joints ... culture, look for crystals ... psoriatic arthritis Crystals
Urine Microscopy - Kidney Stones and Crystals 

Uric Acid, Cystine, Hippurate, Cloth Fiber, Tyrosine, CaOx, CaP,
Kidney Stones and Crystals ... , CaOx, CaCO3, Struvite ... Urine #Microscopy #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
Urine Microscopy Crystals
Uric Acid crystals:
 - Formation promoted by acidic urine
 - Seen in tumor lysis
Urine Microscopy Crystals ... Uric Acid crystals ... Calcium phosphate crystals ... phosphate (a.k.a. struvite ... triple phosphate") 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
Sulfa Crystals on Urine Microscopy
Sulfa Crystal!  Drug-induced crystalluria is a cause of acute renal failure
Sulfa Crystals on ... Microscopy Sulfa Crystal ... TELMALEMOS10 #Sulfa #Crystals