47 results
Causes of Fatigue - Differential Diagnosis Algorithm
Endocrine
 • Hypo/Hyperthyroidism
 • Diabetes
 • Pituitary Insufficiency
 • Adrenal
Liver Failure • Hypercalcemia ... • Rheumatoid Arthritis ... Obstructive Pulmonary ... Disease Neurologic ... • Drug Abuse (e.g
Etiologies of Hypernatremia - Differential Diagnosis
GI losses / Insensible losses
Sodium Overload
Transcellular Movement of Water
Central Diabetes Insipidus
Infiltrative disorders (e.g ... - Medications (e.g ... - Chronic hypokalemia ... renal diseases (e.g ... #Table #Causes
Reflex Testing - Causes of Hyporeflexia and Hyperreflexia
Focal Hyporeflexia: 
 • Radiculopathy, Mononeuropathy, Polyneuropathy, Acute stroke,
Polyneuropathy, Acute ... Hyporeflexia: • Hypercalcemia ... polyneuropathy (e.g ... #differential #diagnosis ... #table #neurology
Hyperkalemia shortens repolarization; changes in the T wave provide the earliest clues to hyperpotassemia.
 - At
Hyperkalemia shortens ... prolonged PR and QT ... #Diagnosis #Hyperkalemia ... #EKG #ECG #Changes ... #Progression #Table
Acute and Chronic Causes of Dyspnea - Differential Diagnosis
Pulmonary/Chest Wall:
 • Acute: Trauma, COPD exacerbation, Asthma
Causes of Dyspnea ... Pulmonary/Chest ... Neuromuscular disease (eg ... Metabolic acidosis (eg ... #Chronic #Causes
Diffuse consolidation
The most common cause of diffuse consolidation is pulmonary edema due to heart failure.
This is
Look for other signs ... patients, who have an acute ... heart due to a chronic ... near-drowning etc ... #Diagnosis #Radiology
Causes of Secondary Hypertension - Workup and Differential Diagnosis
Approach (when evaluation should be done):
1. Severe or
and Differential Diagnosis ... risk factors (eg ... hypertension (eg ... hypertension (eg ... renal bruit or signs
Causes of Hypercalcemia
Parathyroid hormone–dependent
Primary hyperparathyroidism
Familial hypocalciuric hypercalcemia
Lithium-associated
Tertiary hyperparathyroidism
Genetic disorders (e.g., multiple endocrine neoplasia type 1 or
Causes of Hypercalcemia ... Genetic disorders (e.g ... Renal failure, acute ... or chronic* Neoplasms ... #Diagnosis #Endocrinology
Approach to Headaches - Differential Diagnosis Algorithm

Red flags (PHANTOMS):
 • Pattern change, progressively worse, papilledema
 •
(e.g., fever, myalgia ... CNS infection (e.g ... ) • Temporal arteritis ... • Acute angle ... #Algorithm #neurology
Causes of Peripheral Edema - Differential Diagnosis
Increased Hydrostatic Pressure
 • Volume Expansion: Kidney failure, Pregnancy, Medication
Medication side effect (e.g ... prednisone, NSAIDs), Acute ... Heart failure, Pulmonary ... vein thrombosis, Chronic ... • Filariasis (e.g