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Ultrasonographic Evaluation of Breast Cancer-related Lymphedema
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Obesity-induced Upper Extremity Lymphedema.

Arin K Greene1, Reid A Maclellan1

  • 1Department of Plastic and Oral Surgery, Lymphedema Program, Boston Children's Hospital, Harvard Medical School, Boston, Mass.

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Summary

Obesity can lead to lymphedema in all four extremities, even after weight loss. This case highlights a higher body mass index (BMI) threshold may be needed to cause upper extremity lymphatic dysfunction.

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Area of Science:

  • Medical Science
  • Oncology
  • Lymphedema Research

Background:

  • Obesity is a known risk factor for secondary lymphedema, particularly after cancer treatment.
  • Lymphatic dysfunction can affect both upper and lower extremities, with varying thresholds based on obesity levels.

Observation:

  • A 62-year-old male patient with a history of extreme obesity (previous BMI 105.6) presented with lymphedema in all four extremities.
  • Despite significant weight loss (current BMI 60.3), the patient's lymphedema persisted, affecting both upper and lower limbs.
  • Lymphoscintigraphy confirmed lymphatic dysfunction in all four extremities.

Findings:

  • This case represents the first documented instance of obesity-induced upper extremity lymphedema.
  • The findings suggest that upper extremities may have a higher body mass index (BMI) threshold for developing lymphedema compared to lower extremities.
  • The persistence of lymphedema post-weight loss indicates potential long-term lymphatic damage.

Implications:

  • This study expands the understanding of obesity's impact on lymphatic health, particularly in the upper extremities.
  • It suggests a need to consider obesity as a primary etiological factor for upper extremity lymphedema, independent of other causes like cancer treatment.
  • Further research is warranted to establish precise BMI thresholds for upper extremity lymphatic dysfunction and inform clinical management strategies for obese patients.