49 results
Causes of Proximal Muscle Weakness That May Mimic Inflammatory Myopathy
 • Central or peripheral neurologic disease
Muscle Weakness ... Mimic Inflammatory Myopathy ... Mitochondrial myopathy ... MuscleWeakness #Myopathy ... #mimics #diagnosis
Creatine Kinase - Causes of Elevated CK Levels
Acute CK Elevation (Pain > Weakness):
 • RHABDOMYOLYSIS
Creatine Kinase - Causes ... Critical Illness Myopathy ... - Inflammatory myopathy ... polymyositis, necrotizing myopathy ... #differential #diagnosis
Causes of Neuromuscular Weakness
 • Spinal Cord: Demyelinating Disease (MS), Epidural abscess, Infarction, Syringomyelia, Tetanus, Transverse
Causes of Neuromuscular ... Weakness • Spinal ... Motor Nerves: ALS ... Mitochondrial myopathy ... #diagnosis #neurology
Statin Induced Muscle Toxicity - Summary

Clinical Presentation:
 • Elevations of serum creatine kinase with proximal myalgia
proximal myalgia and weakness ... symmetric muscle weakness ... such as • Statin-induced ... Atorvastatin Diagnosis ... #diagnosis #management
Idiopathic Inflammatory Myopathies (IIM's)

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

 • Overlap Myositis
Any inflammatory myopathy ... antisynthetase syndrome ... Inflammatory myopathy ... #IIMs #diagnosis ... #dermatology #Myopathy
Causes of Peripheral Weakness without Sensory Changes - Differential Diagnosis Algorithm
No Objective Weakness
 • Cardio-pulmonary disease
Causes of Peripheral ... - Differential Diagnosis ... Lambert-Eaton Myasthenic Syndrome ... • Congenital Myopathy ... #Algorithm #Causes
Causes of Peripheral Weakness - With and Without Sensory Changes - Differential Diagnosis Algorithm
With Sensory Changes:
Causes of Peripheral ... - Differential Diagnosis ... Oculomotor • Myopathy ... #Differential #Diagnosis ... #Algorithm #Causes
Generalized Weakness - Differential Diagnosis Framework
"l feel weak":
 • Infectious: Influenza, EBV, PNA, Bacteremia, Sepsis
 •
Generalized Weakness ... - Differential Diagnosis ... I am weak": • Myopathy ... Polyneuropathy, ALS ... #causes #neurology
Autoimmune Myositis
Necrotizing myopathy is associated with higher CK levels, greater level of muscle weakness, less systemic
Myositis Necrotizing myopathy ... level of muscle weakness ... anti-synthetase syndrome ... /full triad at diagnosis ... and anti-HMGCR myopathy
Weakness - Differential Diagnosis Framework

Approach To Weakness:
 • Non-neuromuscular disorder (Cardiac, pulmonary etc)
 • CNS ->
Diagnosis Framework ... • Acute stroke syndromes ... Myopathy: ... mediated necrotizing myopathy ... #Differential #Diagnosis