文档介绍：Surgery for Anal CancerPeter SagarThe General Infirmary at LeedsWhere is the anal canal??Perianal cancer?Anal canal cancerAnal canalPerianalneoplasms?Perianal skin – junction of the hair-bearing skin and anoderm of the anal canalPerianalneoplasms?Squamous cell carcinoma?Basal cell carcinoma?Bowen’s disease?PerianalPaget’s diseaseSquamous cell carcinoma?Rolled everted edges?Central ulceration?Late diagnosis?30% misdiagnosed?Spread to lymph nodesPerianalsquamous cell carcinoma- treatment?Wide local excision – well differentiated, up to 3 cm?Less favourable lesions- chemoradiation(40-70 Gy)Perianal basal cell carcinoma?mon?1-2 cm?Rarely metastasize?Misdiagnosed in 33%?Delayed diagnosis?Rx – local excision with adequate marginsBowen’s disease?Intraepidermalsquamous cell carcinoma?Associated with primary internal malignancies (5%)?Discrete scaly or crusted plaquesBowen’s disease- mapping biopsies