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Related Concept Videos

Indicators02:39

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Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are...
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Consider a system comprising several point masses. The coordinates of the center of mass for this system can be expressed as the summation of the product of each mass and its position vector divided by the total mass:
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The concept of therapeutic equivalence (TE) in drugs with multiple indications is complex. A generic drug may be therapeutically equivalent to a brand-name product for one specific indication, but this doesn't necessarily mean it's equivalent for all other indications. Evidence of TE in one patient group and bioequivalence shown in healthy volunteers can support—but not confirm—TE for other indications. However, definitive proof requires individual clinical studies for each...
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Urgent Pelvic Exenteration: Should the Indication Be Extended?

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Urgent pelvic exenteration for rectal cancer is feasible, showing comparable survival and morbidity to elective procedures. This approach offers acceptable outcomes for patients with rapidly deteriorating conditions.

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Area of Science:

  • Oncology
  • Surgical Oncology
  • Gastroenterology

Background:

  • Pelvic exenteration is a major surgery with significant risks, typically performed electively.
  • Rectal cancer complications can necessitate urgent intervention despite optimal management.
  • Urgent pelvic exenteration may be a viable option for patients with rapidly declining health.

Purpose of the Study:

  • To compare outcomes of pelvic exenteration in urgent versus elective settings.
  • Evaluate survival rates and postoperative complications in both groups.

Main Methods:

  • Retrospective study of 53 patients with locally advanced rectal cancer.
  • Patients were divided into urgent (n=26) and elective (n=27) groups based on preoperative condition.
  • Comparison of 3-year overall survival, disease-free survival, and 30-day postoperative morbidity/mortality.

Main Results:

  • No significant difference in 3-year overall survival (62.2% elective vs. 54.4% urgent) or disease-free survival (43% elective vs. 63.8% urgent).
  • Thirty-day postoperative morbidity was similar between groups (p=0.49).
  • Low serum albumin was a risk factor for complications; no postoperative mortality observed.

Conclusions:

  • Urgent pelvic exenteration is feasible and yields acceptable outcomes.
  • This procedure can be considered for patients with locally advanced rectal cancer requiring immediate surgical intervention.
  • Further research, including quality-of-life assessments, is warranted.