Draining sinus tracts

Question 1

Define sinus

Answer 1

tract from skin surface to a deeper, but abnormal, focus, usually in therdermis or subcutis

Question 2

Define fistula

Answer 2

tract between two epithelium- line structures (e.g. skin and a hollow organ)

Question 3

List 4 ways material can reach the dermis/ subcutis

Answer 3

penetration from surface
breakdown of the hair follicle (furuncolosis)
systemic routes
formed within skin

Question 4

draining tracts usually reflect ….( 3 things)

Answer 4

deep infection
foreign body
immune-mediated/ autoimmune disease

Question 5

List the 3 most common infectious causes of draining sinus tracts

Answer 5

deep pyoderma
abscess/ cellulitis
demodicosis

Question 6

List 3 non-infectious causes of draining sinus tracts

Answer 6

anal furunculosis (perianal fistulae)
metatarsal fistulation
sterile panniculitis- steatitis (yellow fat disease)

Question 7

what causes pansteatitis (yellow fat disease)

Answer 7

insufficient dietary vit E and/or excessive dietary unsaturated fatty acids
cats with fish only diet are at increased risk

Question 8

Diagnnosis of pansteatitis

Answer 8

general history + clinical signs
definitive= skin biopsy

Question 9

management of pansteatitis

Answer 9

supportive care- analgesia and parenteral
need to be fed high-quality properly balanced diet

Question 10

what breed has a genetic predisposition for anal furunculosis

Answer 10

GSD

Question 11

Treatment of anal furunculosis

Answer 11

immunosupression- ciclosporin
NSADIS
Abs for secondary infection

Question 12

Treatment of metatarsal fistulation

Answer 12

ciclosporin and topical tacrolimus