Anal Warts


DEFINITION
AKA Condyloma Acuminatum

D I A B M I M


INCIDENCE

Increased since the 1960s.

Risk factors
Sailors and whores.
Having a husband who's a milkman.
Lots of sex with lots of partners.
- and not using condoms.
Most pts with anal warts have a history of anal-receptive intercourse
But by no means always associated with sex.

Immune-deficit
Commonly worse in immun-suppressed pts
- eg AIDs, chemo, steroids.

D I A B M I M


AETIOLOGY
HPV.
- 70 types.
- 30 types are genital.
D I A B M I M


BIOLOGICAL BEHAVIOUR

Natural History
Species are site specific (so can't be transferred from a hand to genitals).
Intact virions invade high turnover epithelium.
Invade through abrasions, through birth, or through fomites.
Giant form
-
rare
- termed 'Busheke-Lowenstein disease'
- can invade, fistulise, or associate with verrucous carcinoma and SCC.

Complications
Some types, eg HPV 6 & 11 are associated with benign warts
HPV-16 and 18 are oncogenic, commonly associated with dysplasia and malignancies.
- see anal SCC

D I A B M I M


MANIFESTATIONS

Symptoms
Warty growth.
Pruritus ani
Bleeding
Pain
Discharge / wetness.

Remember SCC association

Signs
Pinkish-white usually
Pedunculated papilerferous lesions
Vary in size & coalescence
- spread over genitalia / perineum
May extend into anal canal


Common Differentials
Molluscum contagiosum
Secondary syphilis
Enlarged anal papillae.
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INVESTIGATIONS

Pathology
Histology confirmative
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MANAGEMENT
Often disappointing
Many proposed, few ideal.

Podophyllin
Cytotoxic to condylomata
Irriative to normal skin.
Limited to minimal disease / extra-anal warts
Do not repeat
- local complications
- potential systemic toxicity
Cheap but often ineffective.

Dichloroacetic acid
Destroys perianal and intra-anal warts
Less irritating.

Surgical excision
Much lower recurrence
Raise lesion by injecting a bleb beneath.
Use small scissors for precision.


Interfern-Beta
Effective but complicated

Cryotherapy.
70% go away.
1/3 of these later relapse.

FAQs
Should I follow them up?
Yes, recurrence is frequent.
D I A B M I M