Signs in Radiology

1. Rabbit Ear Sign : Bilateral Subdural Hematomas in CT (Both frontal horns pointing poateriorly).

2. Dawson's Fingers : Multiple Sclerosis - MRI Brain (the result of inflammation around long axis of medularry veins)

3. Light Bulb sign - In posterior dislocation of shoulder.

4. Golden-S-Sign : Right upper lobe collapse in Chest X Ray.

5. 'Bat Wing Deformity of cerebral ventricles on CT/MRI - Agenesis of Corpus Callosum.

(AIIMS Nov'07 Expln)

6. 'Moth Eaten appearance' in V/Q Scan - Lung ----> Seen in BRONCHIOLITIS OBLITERANS.

(AIIMS Nov'07 Expln)

7. 'Reticular Pattern' in Chest CT ---> Follicular Bronchitis. (AIIMS Nov'07 Expln)

8. 'Sandstorm Appearance' or sand like appearance in Chest Radiography --> Seen in Pulmonary Alveolar Microlithiasis (P.A.M).

(AIIMS Nov'07 Expln)

9. Deep white matter lesion with bilateral bright thalami on C.T.--> KRABBE's Disease (Globoid Leukodystrophy).

(AIIMS NOV'07 Q)

10. Looser's Zones or Pseudofractures : Classically seen in Osteomalacia. (Also seen in Paget's, Fibrous Dysplasia, and osteoporosis)

11. Protusio Acetabuli and Triradiate Pelvis - Osteomalacia.

12. Rugger Jersey Spine - Osteopetrosis / Albers-Schonberg Disease /Marble Bone Disease and in Renal Osteodystrophy.

----------------------Congential Cardiac Diseases : Chest Radiography--------------------------------

13. Boot shaped heart / Cor en Sabot --- Tetralogy of Fallot.

14. Box Shaped Heart --- Ebstein's Anomaly.

15. Snowman Appearance / Figure of 8 Appearance - TAPVC (Asked 2 times in May 08 AIIMS)

16. Figure of 3 / Reverse Figure of 3 --- Coarctation of Aorta.

17. Goose Neck Sign --- Endocardial Cushion Defects.

18. Sitting Duck Sign --- Patent Truncus Arteriosus.

19. Scimitar Sign --- PAPVC - Partial Anomalous Pulm Venous Return.

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20. Scimitar Sacrum ---- Presacral Meningomyelocole.

21. Floating water Lily sign ---- Hydatid Cyst of Liver.

------------ Pulmonary Thromboembolism------------------------------------------------------------

22. Westermark's Sign --- Focal area of oligemia d/t vasoconstriction distal to embolus.

23. Palla's Sign -- Enlarged Right Descending Pulmonary Artery.

24. Hampton's Hump --- Peripheral Wedge shaped opacity in CXR d/t pulmonary infarct.

25. Fleischner Sign -- Local widening of artery d/t impaction.

26. Knuckle Sign -- Abrupt tapering of Occluded vessel distally.

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pgmeenotes by dv.