Management of locally advanced lynch syndrome rectal cancer during pregnancy with neoadjuvant immunochemotherapy: a case report - Scorecard - MDSpire

Management of locally advanced lynch syndrome rectal cancer during pregnancy with neoadjuvant immunochemotherapy: a case report

  • By

  • Shaoqing Fan

  • Xiurong Li

  • Li Shi

  • Jianan Dong

  • May 20, 2026

  • 0 min

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Clinical Scorecard: Treatment of Locally Advanced Rectal Cancer Associated with Lynch Syndrome During Pregnancy Using Neoadjuvant Immunochemotherapy: A Case Study

At a Glance

CategoryDetail
ConditionLocally Advanced Rectal Cancer Associated with Lynch Syndrome
Key MechanismsLynch syndrome is caused by germline mutations in mismatch repair genes, leading to increased colorectal cancer risk.
Target PopulationPregnant women with Lynch syndrome diagnosed with locally advanced rectal cancer.
Care SettingMultidisciplinary team involving colorectal surgery, oncology, obstetrics, and genetics.

Key Highlights

  • Lynch syndrome increases colorectal cancer risk by 40-80%.
  • Neoadjuvant immunochemotherapy achieved significant tumor regression.
  • Medical termination of pregnancy was performed due to fetal viability concerns.
  • Patient remained disease-free at 24 months follow-up.
  • Multidisciplinary management is crucial for optimizing outcomes.

Guideline-Based Recommendations

Diagnosis

  • Use imaging (ultrasonography, MRI) and colonoscopy for diagnosis.
  • Histopathological confirmation of adenocarcinoma with immunohistochemistry for Lynch syndrome.

Management

  • Consider medical termination of pregnancy in cases of poor fetal viability.
  • Administer neoadjuvant chemoradiotherapy followed by surgical resection.

Monitoring & Follow-up

  • Regular follow-up with imaging and serum tumor markers post-treatment.

Risks

  • Potential teratogenic effects of systemic therapy during pregnancy.
  • Genetic implications for offspring due to Lynch syndrome.

Patient & Prescribing Data

Pregnant women diagnosed with locally advanced rectal cancer and Lynch syndrome.

Combination of capecitabine, oxaliplatin, and tislelizumab was effective with manageable side effects.

Clinical Best Practices

  • Engage in shared decision-making with patients regarding treatment options.
  • Incorporate genetic counseling into the management plan.
  • Utilize a multidisciplinary approach for complex cases.

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