Most<unk> s are squamous cell carcinomas (epidermoid carcinomas), that arises near the squamocolumnar junction. It may be keratinizing (basaloid) or non-keratinizing (cloacogenic). Other types of<unk>  are adenocarcinoma, lymphoma, sarcoma or melanoma. File:Diagram showing stage 1<unk>  CRUK 189.Stage 1<unk>  File:Diagram showing stage 2<unk>  CRUK 204.Stage 2<unk>  File:Diagram showing stage 3<unk>  CRUK 217.Stage 3<unk>  File:Diagram showing stage 4<unk>  CRUK 227.Stage 4<unk>  Staging Pathologic TNM staging of anal carcinomas: Primary tumor (pT) * "TX: Primary tumor not assessed" * "T0: No evidence of primary tumor" * "Tis: High grade squamous intraepithelial lesion" * "T1: Tumor ≤ 2 cm" * "T2: Tumor > 2 cm but ≤ 5 cm" * "T3: Tumor > 5 cm" * "T4: Tumor of any size invading adjacent organ(s), such as the vagina, urethra or bladder" Regional lymph nodes (pN) * "NX: Regional lymph nodes cannot be assessed" * "N0: No regional lymph node metastasis" * "N1: Metastasis in inguinal, mesorectal, internal iliac or external iliac nodes" * "N1a: Metastasis in inguinal, mesorectal or internal iliac nodes" * "N1b: Metastasis in external iliac lymph nodes" * "N1c: Metastasis in external iliac with any N1a nodes" Distant metastasis (pM) * "M0: No distant metastasis" * "M1: Distant metastasis"
Anal cancer
Genital wart
Anal fissure
Hemorrhoid
Anal fistula
Genital ulcer
Anorectal varices
Perianal cellulitis