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Pulmonary pleomorphic carcinoma with rapid progression.

Yasushi Shintani1, Mitsunori Ohta, Teruo Iwasaki

  • 1Department of Thoracic Surgery, Osaka Prefectural Hospital Organization, Osaka Prefectural Medical Center for Respiratory and Allergic Disease, Osaka, Japan.

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A recurrent chest wall tumor showed aggressive sarcomatous features after initial surgery for pleomorphic carcinoma. This suggests the sarcomatous component possesses a higher malignant potential than the epithelial cells.

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Cadherinsadenosquamouscarcinomaepithelial-mesenchymal transitionlung neoplasms

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Area of Science:

  • Oncology
  • Pathology
  • Surgical Oncology

Background:

  • Pleomorphic carcinoma is a rare malignancy with both epithelial and sarcomatous components.
  • Complete resection is the primary treatment for localized tumors.

Observation:

  • A patient presented with a recurrent chest wall tumor two months post-resection.
  • The recurrent tumor exhibited massive hemorrhage and myxoid changes.
  • Initial tumor specimens contained adenosquamous carcinoma and sarcomatous elements.

Findings:

  • The recurrent tumor was predominantly composed of sarcomatous elements.
  • Immunohistochemical analysis revealed increased expression of mesenchymal markers in the recurrent tumor.
  • This indicates a higher malignant potential in the sarcomatous component compared to the epithelial component.

Implications:

  • The sarcomatous element may drive tumor recurrence and progression in pleomorphic carcinoma.
  • This case highlights the importance of monitoring for aggressive recurrence after treatment.
  • Further research into the behavior of sarcomatous components in pleomorphic carcinoma is warranted.