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Related Concept Videos

The Availability Heuristic01:08

The Availability Heuristic

A heuristic is a general problem-solving framework (Tversky & Kahneman, 1974). You can think of these as mental shortcuts that are used to solve problems. Different types of heuristics are used in different types of situations, and the impulse to use a heuristic occurs when one of five conditions is met (Pratkanis, 1989):

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Related Experiment Video

Updated: May 20, 2026

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
12:33

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 15, 2013

[Not Available].

F Leblanc, C Laurent, E Rullier

    Journal De Chirurgie
    |July 17, 2012
    PubMed
    Summary
    This summary is machine-generated.

    Lymph node dissection is crucial for rectal cancer surgery, aiding local recurrence prevention and accurate staging. Lateral dissection is not recommended due to complications and lack of survival benefit, except for specific small tumors.

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    Last Updated: May 20, 2026

    High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
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    Published on: December 28, 2016

    Area of Science:

    • Oncology
    • Surgical Oncology
    • Gastrointestinal Surgery

    Context:

    • Rectal cancer surgery involves lymph node dissection for staging and local recurrence prevention.
    • Standard surgical practice includes evaluating mesorectal and inferior mesenteric lymph node compartments.
    • Lateral lymph node dissection is a debated topic with potential complications.

    Purpose:

    • To review the role and techniques of lymph node dissection in rectal cancer resection.
    • To delineate the recommended extent of mesorectal and inferior mesenteric lymphadenectomy.
    • To assess the utility and indications for lateral lymphadenectomy in rectal cancer.

    Summary:

    • Mesorectal lymphadenectomy should systematically remove the mesorectum, extending at least 5cm distally.
    • Inferior mesenteric lymphadenectomy should extend to the left colic artery origin.
    • Lateral lymphadenectomy (iliac/obturator nodes) is not routinely recommended due to complications and unproven survival benefits; omission is reserved for select T1 tumors.

    Impact:

    • Provides clear guidelines on lymph node dissection extent for rectal cancer.
    • Helps surgeons optimize staging and minimize local recurrence.
    • Supports evidence-based decision-making regarding lateral lymphadenectomy, improving patient outcomes and reducing surgical morbidity.