Last reviewed: 5 Oct 2024
Last updated: 18 Jul 2024
Summary
Definition
History and exam
Key diagnostic factors
- rectal bleeding
- rectal pain
- rectal mass
Full details
Other diagnostic factors
- anal discharge
- anal itching
- fecal incontinence
- anal fistula
- non-healing ulcer
- inguinal node mass
- features of distant metastasis
Full details
Risk factors
- HPV
- HIV
- immunosuppression
- receptive anal intercourse
- multiple sexual partners
- autoimmune disease
- smoking
- anal intraepithelial neoplasia
- anal fistula
Full details
Diagnostic tests
1st tests to order
- anoscopy
- biopsy of tumor
- pelvis MRI scan
- pelvis CT scan
- abdominal and chest CT scan
Full details
Tests to consider
- PET scan
- inguinal node needle biopsy
- serum HIV enzyme-linked immunosorbent assay (ELISA)
- cervical cancer screening
Full details
Treatment algorithm
ACUTE
locoregional disease
distant metastatic disease
Contributors
Authors
Bruce D. Minsky, MD
Professor and Frank T. McGraw Endowed Chair
Radiation Oncology
MD Anderson Cancer Center
Houston
TX
Disclosures
BDM declares that he has no competing interests.
Peer reviewers
Brian Czito, MD
Associate Professor
Department of Radiation Oncology
Duke University Medical Center
Durham
NC
Disclosures
BC declares that he has no competing interests.
Lisa Kachnic, MD
Chief and Associate Professor
Department of Radiation Oncology
Boston University Medical Center
Boston
MA
Disclosures
LK has received funding from the US Department of Defense to perform research on non-anal cancers. LK is the author of a study referenced in this topic.
Sue Clark, MD
Consultant Colorectal Surgeon
Assistant Director
The Polyposis Registry
St Mark's Hospital
Harrow
UK
Disclosures
SC declares that she has no competing interests.
Differentials
- Hemorrhoids
- Rectal cancer
- Anal margin cancer
More DifferentialsGuidelines
- NCCN clinical practice guidelines in oncology: cancer in people with HIV
- NCCN clinical practice guidelines in oncology: anal carcinoma
More GuidelinesPatient information
Anal tears
Bowel cancer
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