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Metastasis02:30

Metastasis

Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...

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Carcinoid tumor and pulmonary sequestration.

Fernando Luiz Westphal1, Luís Carlos de Lima, José Corrêa Lima Netto

  • 1Hospital Universitário Getúlio Vargas, Faculdade de Medicina, Universidade Federal do Amazonas, Manaus, AM, Brasil. f.l.westphal@uol.com.br

Jornal Brasileiro De Pneumologia : Publicacao Oficial Da Sociedade Brasileira De Pneumologia E Tisilogia
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Pulmonary sequestration, a lung abnormality, was unexpectedly discovered during surgery for a carcinoid tumor. This rare condition caused significant bleeding when its feeding artery was accidentally cut.

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Area of Science:

  • Thoracic surgery
  • Pulmonary medicine
  • Surgical oncology

Background:

  • Pulmonary sequestration involves lung tissue with abnormal systemic arterial supply.
  • Co-occurrence with lung neoplasms is uncommon.
  • Carcinoid tumors are neuroendocrine tumors arising from lung cells.

Observation:

  • A 39-year-old female presented with a carcinoid tumor in the intermediate bronchus and bronchiectasis in the right lower lobe.
  • Surgical resection via thoracotomy was performed for the tumor.
  • Significant hemorrhage occurred during surgery due to transection of an anomalous artery.

Findings:

  • The anomalous artery was supplying an intralobar pulmonary sequestration in the right lower lobe.
  • The pulmonary sequestration was not detected during preoperative evaluations.
  • The hemorrhage was directly related to the unrecognized sequestration's vascular supply.

Implications:

  • Highlights the importance of thorough preoperative imaging to detect concurrent pulmonary sequestration.
  • Underscores potential surgical complications when pulmonary sequestration is missed.
  • Emphasizes the need for vigilance in identifying rare congenital lung anomalies during thoracic procedures.