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TYPE I & TYPE II ERRORS 

SENSITIVITY & SPECIFICITY = SNOUT & SPIN 
Sensitive Tests that
SPECIFICITY = SNOUT ... Negative Rule OUT Disease ... Positive Rule LN Disease
Important Biostatistics and Epidemiology Equations

Sensitivity = TP / (TP + FN) = true positives / disease
true positives / disease ... true negatives / disease ... Sensitivity = SNOUT ... #calculations #diagnosis
CT Lung Signs in Pulmonary Diseases - One Page Summary of Pulmonary Signs
 - Air Crescent
CT Lung Signs in ... Pulmonary Diseases ... Bronchus sign - Signet ... Signs #Pulmonary #Diseases ... #diagnosis #differential
Orbicularis Reflex in an Alzheimer's Patient on Physical Exam

Alzheimer's is a degenerative, progressive and irreversible disease.
and irreversible disease ... course of the disease ... #Orbicularis #Snout
Chronic Cough - Differential Diagnosis Algorithm
Red Flags:
 • Fever, night sweats, chills (infection)
 • Weight loss,
- Differential Diagnosis ... underlying lung disease ... refer + order CT ... of cancer, lung disease ... #Differential #Diagnosis
Consensus diagnostic criteria for asthma-COPD overlap syndrome (ACOS) in patients with airflow limitation. COPD=chronic obstructive pulmonary
Consensus diagnostic ... obstructive pulmonary disease ... ; CT=computed tomography ... limit of normal #Diagnosis
Cushing's Syndrome - Hypercortisolism - Diagnosis and Clinical Features
1) Skin
 • Thin, easily bruisable skin with
Hypercortisolism - Diagnosis ... ) Peptic Ulcer disease ... 2) Cushing's disease ... • In Cushing's disease ... Hypercortisolism #Diagnosis
Causes of Secondary Hypertension - Differential Diagnosis and Screening Testing
Common causes: 
 • Renal parenchymal disease
- Differential Diagnosis ... cause of renal disease ... • Renovascular disease ... MRA; abdominal CT ... #Differential #Diagnosis
Pulmonary Renal Syndrome

Definition: Diffuse alveolar hemorrhage + Glomerulonephritis
Presentation (Pulmonary and renal manifestations can occur weeks apart):
Differential Diagnosis ... vasculitis, Behcet disease ... Goodpasture's Disease ... resolution chest CT ... #differential #diagnosis
Imaging Modalities for Renal Calculus

AXR. KUB
 - Good far calcium-containing stones useful when limited radiation dose
Non-contrast CT ... abdominal pain: diagnoses ... retroperitoneal disease ... CT-KUB - Combination ... urinary tract: diagnostic