144 results
Myositis and Myopathies
Polymyositis 
 • Progressive, symmetric muscle weakness 
 • Elevated CK, +Anti-Jo, +Anti-Mi2
Dermatomyositis
temporal arteritis Inclusion ... elevated CK, Biopsy: inclusions ... load Drug-induced myopathy ... Gemcitabine Lupus Myopathy ... 5-15% of lupus myopathy
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
Differential diagnosis of myopathy ... Polymyositis #Inclusion ... #Hypothyroid myopathy ... Statin-induced myopathy ... Cocaine-induced myopathy
Idiopathic Inflammatory Myopathies - 
Dermatomyositis (DM), Immune-Mediated Necrotizing Myopathy (IMNM), Antisynthetase Syndrome (ASS), Inclusion Body Myositis
Immune-Mediated Necrotizing Myopathy ... Syndrome (ASS), Inclusion ... Myopathies #Idiopathic #Myopathy
Myositis Specific Antibodies (MSAs)

Dermatomyositis: MDA5, TIF1y, NXP2, Mi-2, SAE
Anti-Synthetase Syndrome: Jo-1, PL7, PL12, EJ, OJ
Immune Mediated
Mediated Necrotizing Myopathy ... ): HMGCR, SRP Inclusion
Statin Induced Muscle Toxicity - Summary

Clinical Presentation:
 • Elevations of serum creatine kinase with proximal myalgia
• Inflammatory myopathy ... hypothyroid-induced myopathy ... dermatomyositis, inclusion ... Statin-induced myopathy ... - Necrotizing myopathy
Creatine Kinase - Causes of Elevated CK Levels
Acute CK Elevation (Pain > Weakness):
 • RHABDOMYOLYSIS
Critical Illness Myopathy ... - Inflammatory myopathy ... polymyositis, necrotizing myopathy ... PROXIMAL AND DISTA: Inclusion
Idiopathic Inflammatory Myopathies (IIM's)

RASH + MUSCLE WEAKNESS → Consider idiopathic inflammatory myopathies (IIM's)

 • Overlap Myositis
Any inflammatory myopathy ... antisynthetase syndrome • Inclusion ... Inflammatory myopathy ... #dermatology #Myopathy
Generalized Weakness - Differential Diagnosis Framework
"l feel weak":
 • Infectious: Influenza, EBV, PNA, Bacteremia, Sepsis
 •
I am weak": • Myopathy ... dermato-, poly-, inclusion
Weakness - Differential Diagnosis Framework

Approach To Weakness:
 • Non-neuromuscular disorder (Cardiac, pulmonary etc)
 • CNS ->
proximal weakness Myopathy ... mediated necrotizing myopathy ... • Autoimmune: Inclusion ... polymyositis, inclusion
Common RBC Inclusions and Associations
 • Howell Jolly Bodies: Hyposplenism, Asplenism, Severe hemolytic anemia
 • Heinz
Common RBC Inclusions ... • Hemoglobin H Inclusion ... cell, MDS #RBC #Inclusions