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Other lesions



5  Non-tumorous skin diseases

5.23  Other lesions

5.23.1  Fistula, sinus tract

Introduction:

Caused by drainage of an inflammatory process (eg. perirectal, on the neck and others). In tuberculosis the term scrophuloderma is used (on the neck).

Sometimes this term is used for congenitally based communication.

Histology:

Chronic inflammation with neutrophils, draining sinus, often lined by squamous epithelium.

Pictures

Fistula, inflammation:
Fistula, 20x (5111)
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