Permacol provided a strong and durable repair for up to six months. Peri-Guard was equally strong but prone to infection and to skin ulceration. With time, Veritas and Alloderm lost tensile strength associated with marked thinning and with hernia-like bulging in the case of Alloderm.
Adenocarcinoma arising from long-standing perianal CD fistulae is being increasingly reported. The outcome is poor following operative treatment, especially if perirectal lymph nodes are involved. Periodical cancer surveillance should be performed in all patients with long-standing perianal CD fistulae.
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