31 results
Causes of Proximal Muscle Weakness That May Mimic Inflammatory Myopathy
 • Central or peripheral neurologic disease
Proximal Muscle Weakness ... Mimic Inflammatory Myopathy ... Mitochondrial myopathy ... MuscleWeakness #Myopathy ... #mimics #diagnosis
Neurological Patterns of Weakness
 • Hemispheric lesion
 • Brainstem lesion
 • Spinal cord lesion
 • Polyneuropathy
Neurological Patterns of Weakness ... Polyneuropathy • Myopathy ... #Neurology #Patterns ... #Weakness #diagnosis
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
Causes of Neuromuscular Weakness
 • Spinal Cord: Demyelinating Disease (MS), Epidural abscess, Infarction, Syringomyelia, Tetanus, Transverse
Neuromuscular Weakness ... Motor Nerves: ALS ... Mitochondrial myopathy ... #differential #diagnosis ... #neurology
Weakness - Differential Diagnosis Framework

Approach To Weakness:
 • Non-neuromuscular disorder (Cardiac, pulmonary etc)
 • CNS ->
Diagnosis Framework ... Myopathy: ... mediated necrotizing myopathy ... #Differential #Diagnosis ... #neurology
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
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
Causes of Peripheral Weakness - With and Without Sensory Changes - Differential Diagnosis Algorithm
With Sensory Changes:
of Peripheral Weakness ... - Differential Diagnosis ... Oculomotor • Myopathy ... #Sensory #Neurology ... #Differential #Diagnosis
Causes of Peripheral Weakness without Sensory Changes - Differential Diagnosis Algorithm
No Objective Weakness
 • Cardio-pulmonary disease
- Differential Diagnosis ... Lambert-Eaton Myasthenic Syndrome ... • Congenital Myopathy ... #Neurology #Differential ... #Diagnosis #Algorithm