Question:
How should anal cancer without distant metastasis be treated?
How should anal cancer without distant metastasis be treated?
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Anal Cancer Management:
- Primary Therapy: Nigro Protocol (5-FU + Mitomycin C + Radiation).
- Salvage Therapy (for recurrence/persistent disease): Abdominoperineal Resection (APR).
- Primary Therapy: Nigro Protocol (5-FU + Mitomycin C + Radiation).
- Salvage Therapy (for recurrence/persistent disease): Abdominoperineal Resection (APR).
Updated On: Sep 3, 2026
- Chemoradiotherapy
- Abdominoperineal resection
- Anterior resection
- Chemotherapy
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The Correct Option is A
Solution and Explanation
Concept:
The primary histology for anal cancer is Squamous Cell Carcinoma (SCC). The management paradigm for anal SCC is distinct from rectal adenocarcinoma and prioritizes organ preservation.
Explanation:
• Historically, anal cancer was treated surgically with an Abdominoperineal Resection (APR), which leaves the patient with a permanent colostomy.
• The introduction of the Nigro Protocol revolutionized the management of this disease. Anal SCC is highly radiosensitive and chemosensitive.
• The current gold standard primary treatment for non-metastatic anal squamous cell carcinoma is definitive Chemoradiotherapy (Option A). This typically involves external beam radiation combined with concurrent chemotherapy (usually 5-Fluorouracil and Mitomycin C).
• This approach achieves excellent local control and high cure rates while preserving the anal sphincter mechanism in the vast majority of patients.
• Radical surgery, specifically Abdominoperineal Resection (APR, Option B), is strictly reserved for "salvage" therapy—meaning it is only used for patients who fail to respond to chemoradiotherapy or who suffer a local recurrence later.
Final Answer:
Anal cancer without distant metastasis is primarily treated with definitive chemoradiotherapy (the Nigro protocol) to achieve cure with sphincter preservation.
The primary histology for anal cancer is Squamous Cell Carcinoma (SCC). The management paradigm for anal SCC is distinct from rectal adenocarcinoma and prioritizes organ preservation.
Explanation:
• Historically, anal cancer was treated surgically with an Abdominoperineal Resection (APR), which leaves the patient with a permanent colostomy.
• The introduction of the Nigro Protocol revolutionized the management of this disease. Anal SCC is highly radiosensitive and chemosensitive.
• The current gold standard primary treatment for non-metastatic anal squamous cell carcinoma is definitive Chemoradiotherapy (Option A). This typically involves external beam radiation combined with concurrent chemotherapy (usually 5-Fluorouracil and Mitomycin C).
• This approach achieves excellent local control and high cure rates while preserving the anal sphincter mechanism in the vast majority of patients.
• Radical surgery, specifically Abdominoperineal Resection (APR, Option B), is strictly reserved for "salvage" therapy—meaning it is only used for patients who fail to respond to chemoradiotherapy or who suffer a local recurrence later.
Final Answer:
Anal cancer without distant metastasis is primarily treated with definitive chemoradiotherapy (the Nigro protocol) to achieve cure with sphincter preservation.
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