2432 results
Causes of Proximal Muscle Weakness That May Mimic Inflammatory Myopathy
 • Central or peripheral neurologic disease
Causes of Proximal ... disorders #Proximal ... mimics #diagnosis #differential
Inflammatory Myopathies
Dermatomyositis
 • Onset: Subacute
 • Pattern: Proximal
 • CK: Up to 50X ULN
 • Autoantibodies:
Subacute • Pattern: Proximal ... Subacute • Pattern: Proximal ... subacute • Pattern: Proximal ... slow • Pattern: Proximal ... Inflammatory #Myopathies #differential
Causes of Peripheral Weakness - With and Without Sensory Changes - Differential Diagnosis Algorithm
With Sensory Changes:
Sensory Changes - Differential ... • Myopathy - Proximal ... Sensory #Neurology #Differential
Acute Kidney Injury (AKI) in Patients with Cancer 

Cancer Related 
• Hypercalcemia 
• Intravenous contrast 
•
Heavy chain DD • Proximal ... lysis syndrome • Proximal ... Cancer #Oncology #Differential
Hypokalemia - Differential Diagnosis Algorithm
Extra-renal Losses:
 • Normal Acid-Base: Low intake
 • Metabolic acidosis: Gl tract
Hypokalemia - Differential ... Metabolic acidosis: Proximal ... #Hypokalemia #Differential
Renal Tubular Acidosis - Differential Diagnosis Algorithm
Decreased Serum K, Urine pH < 5.5 - Proximal RTA
Decreased
Tubular Acidosis - Differential ... Urine pH < 5.5 - Proximal ... Tubular #Acidosis #Differential
Urine Anion Gap in NAGMA
NA + K - Cl = surrogate for Urine NH4+
NH4+ is excreted
distrubances - Proximal ... NAGMA #diagnosis #differential
Creatine Kinase - Causes of Elevated CK Levels
Acute CK Elevation (Pain > Weakness):
 • RHABDOMYOLYSIS
Weakness > Pain): • PROXIMAL ... disorder, SLE • PROXIMAL ... #Elevated #CK #differential
Myositis and Myopathies
Polymyositis 
 • Progressive, symmetric muscle weakness 
 • Elevated CK, +Anti-Jo, +Anti-Mi2
Dermatomyositis
and stiffness in proximal ... HIV myopathy • Proximal ... Myopathies #myopathy #differential
Causes of Peripheral Weakness without Sensory Changes - Differential Diagnosis Algorithm
No Objective Weakness
 • Cardio-pulmonary disease
Sensory Changes - Differential ... Congenital Myopathy - Proximal ... Weakness #Neurology #Differential