1. DIFFERENTIAL DIAGNOSIS

3. What is DDx?
 a systematic method of diagnosing a disorder (e.g.,
headache) that lacks unique symptoms or signs
wordnetweb.princeton.edu/perl/webwn
 A differential diagnosis (sometimes abbreviated
DDx, ddx, DD, or ΔΔ) is a systematic method used
to identify unknowns.
en.wikipedia.org/wiki/Differential_diagnosis
 the process of identifying a condition by comparing
the signs and symptoms of all pathologic processes
that may produce similar signs and symptoms
www.juniordentist.com/gpt-terms-d.html

4. Why DDx?
 Ask appropriate question
 Request appropriate investigation
 Accurate Rx
 Appropriate Mx
 Patient will get better instead of worse….

5. Techniques
1. I-VINDICATE
2. SYSTEMS
3. STRUCTURE
4. PATTERN

6.  Iatrogenic
 Vascular
 Infectious/Inflammatory
 Neoplastic
 Degenerative
 Idiopathic
 Congenital
 Autoimmune/Allergy
 Traumatic
 Endocrinal/Emotional

7. SYSTEMS
 Cardiovascular
 Endocrine
 Respiratory
 Musculoskeletal
 Gastrointestinal

8. STRUCTURE
 Heart
 Lungs
 Muscle
 Nerve
 Tendon

9. PATTERN
 Crushing Chest pain + Radiating to Arm &
neck + cold sweats
 Staring Look + Intolerant toWarm +Tremor
 Fever + rash + drop in platlet count + bleeding
gums