Lecture notes for medical students

1. Tips on using my ppt.
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2. Don’t be concerned about number of slides. Half the
slides are blanks except for the title.
3. First show the blank slides (eg. Aetiology ) > Ask
students what they already know about ethology of
today's topic. > Then show next slide which enumerates
aetiologies.
4. At the end rerun the show – show blank> ask questions >
show next slide.
5. This will be an ACTIVE LEARNING SESSION x
three revisions.
6. Good for self study also.
7. See notes for bibliography.

2. Etiology

3. Etiology
• Congenital
• Acquired.

4. Etiology
Causes of persistence of sinus /fistula
• Inadequate drainage:
– Small incisios/ Non dependent
• Lined by epithelium
• Granulomatous infections
• Foreign Body
• Malignancy

5. Clinical Features

6. Clinical Features
A discharging ulcer that doesn’t heal.

7. Diagnostic Studies

8. Diagnostic Studies
• Signogram
• MRI
• Biopsy

9. Operative Therapy

10. Operative Therapy
• Lay open the track.
• Treat the cause.

11. Some Typical Sinuses

12. Some Typical Sinuses
• Preauricular
• Umbilical: Patent VI duct, Urachal
• Pilonidal
• Suture
• Hydradinitis suppurativa
• Actinomycosis, Madura foot
• Osteomyelitis
• Tuberculosis
• Branchial sinus
• Post I&D

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