1672 results
Weakness - Differential Diagnosis Framework

Approach To Weakness:
 • Non-neuromuscular disorder (Cardiac, pulmonary etc)
 • CNS ->
proximal weakness Myopathy ... mediated necrotizing myopathy ... • Metabolic myopathies ... aminotransferases • Serology ... Differential #Diagnosis #neurology
Generalized Weakness - Differential Diagnosis Framework
"l feel weak":
 • Infectious: Influenza, EBV, PNA, Bacteremia, Sepsis
 •
I am weak": • Myopathy ... Inflammatory/Rheum: Myositis ... Diagnosis #causes #neurology
Myositis and Myopathies
#ESR #CK #Differential diagnosis of myopathy 
#Inflammatory #myopathies	#Dermatomyositis	
#muscle weakness
#Polymyositis	
#Inclusion body myositis
#Polymyalgia rheumatica	
#Fibromyalgia	
#Hypothyroid myopathy	
#Muscle stiffness
#Drug-induced
Myositis and Myopathies ... #Inflammatory #myopathies ... Inclusion body myositis ... #Hypothyroid myopathy ... Statin-induced myopathy
Idiopathic Inflammatory Myopathies - 
Dermatomyositis (DM), Immune-Mediated Necrotizing Myopathy (IMNM), Antisynthetase Syndrome (ASS), Inclusion Body Myositis
Idiopathic Inflammatory Myopathies ... Immune-Mediated Necrotizing Myopathy ... Inclusion Body Myositis ... #Inflammatory #Myopathies ... #Idiopathic #Myopathy
Myositis and Myopathies
Polymyositis 
 • Progressive, symmetric muscle weakness 
 • Elevated CK, +Anti-Jo, +Anti-Mi2
Dermatomyositis
Myositis and Myopathies ... Inclusion Body Myositis ... , +Anti-dsDNA, Myositis ... BostonChiefs #Myositis ... #Myopathies #myopathy
Causes of Proximal Muscle Weakness That May Mimic Inflammatory Myopathy
 • Central or peripheral neurologic disease
Mimic Inflammatory Myopathy ... or peripheral neurologic ... • Metabolic myopathies ... Mitochondrial myopathy ... differential #causes #neurology
Autoimmune Myositis
Necrotizing myopathy is associated with higher CK levels, greater level of muscle weakness, less systemic
Autoimmune Myositis ... Necrotizing myopathy ... triad of ILD, myositis ... and anti-HMGCR myopathy ... #Autoimmune #Myositis
Statin Induced Muscle Toxicity - Summary

Clinical Presentation:
 • Elevations of serum creatine kinase with proximal myalgia
• Myalgia • Myositis ... • Inflammatory myopathy ... inclusion body myositis ... Statin-induced myopathy ... - Necrotizing myopathy
Creatine Kinase - Causes of Elevated CK Levels
Acute CK Elevation (Pain > Weakness):
 • RHABDOMYOLYSIS
Critical Illness Myopathy ... - Metabolic Myopathies ... - Inflammatory myopathy ... polymyositis, necrotizing myopathy ... Inclusion body myositis
Myositis Specific Antibodies (MSAs)

Dermatomyositis: MDA5, TIF1y, NXP2, Mi-2, SAE
Anti-Synthetase Syndrome: Jo-1, PL7, PL12, EJ, OJ
Immune Mediated
Myositis Specific ... Mediated Necrotizing Myopathy ... Inclusion Body Myositis ... MithuRheum #Myositis