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The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
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Colorectal Lymphoma: A Contemporary Case Series.

Steven J Skube1, Elliot G Arsoniadis1,2, Megan L Sulciner3

  • 1Department of Surgery, University of Minnesota, Minneapolis, Minnesota.

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Colorectal lymphoma is rare, with varied treatments. Non-cecal involvement and immunosuppression worsen survival, while cecal masses may require urgent resection. This study highlights key factors influencing outcomes in colorectal lymphoma patients.

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Area of Science:

  • Gastroenterology
  • Oncology
  • Hematology

Background:

  • Colorectal lymphomas are uncommon malignancies.
  • Their presentation and management, especially in post-transplant lymphoproliferative disorder (PTLD), lack established guidelines.
  • This study addresses the need for evidence-based insights into colorectal lymphoma.

Purpose of the Study:

  • To characterize the clinical presentation, diagnostic methods, and treatment strategies for colorectal lymphoma.
  • To identify specific differences in presentation and outcomes for patients with PTLD.
  • To provide data that may inform future management guidelines.

Main Methods:

  • A retrospective review of 52 patients diagnosed with colorectal lymphoma between 2000 and 2017 across four hospitals.
  • Data collection included patient demographics, clinical presentation, histology, treatment pathways, and outcomes.
  • Statistical analysis focused on overall survival, recurrence, and complications.

Main Results:

  • Rectal bleeding, abdominal pain, and diarrhea were common presentations; the cecum was the most frequent site.
  • Diffuse large B-cell lymphoma and mantle cell lymphoma were the most common histologies.
  • Patients with mass lesions had a higher risk of urgent resection (35% vs. 8%). Overall survival was 77 months, but shorter for immunosuppressed patients (16 vs. 96 months).

Conclusions:

  • Colorectal lymphoma management is variable, with poorer outcomes associated with noncecal involvement and chronic immunosuppression.
  • Cecal masses pose a higher risk for urgent intervention, suggesting primary resection should be considered.
  • Further research is needed to establish optimal treatment protocols for this rare condition.