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Unsuspected primary pulmonary malignant lymphoma.

Hiroyuki Tao1, Masao Nakata, Hideyuki Saeki

  • 1National Shikoku Cancer Center, Matsuyama, Japan.

The Japanese Journal of Thoracic and Cardiovascular Surgery : Official Publication of the Japanese Association for Thoracic Surgery = Nihon Kyobu Geka Gakkai Zasshi
|February 4, 2003
PubMed
Summary

A lung tumor initially suspected as an abscess was diagnosed as diffuse large B-cell lymphoma after surgery. This case highlights the diagnostic challenges of primary pulmonary lymphomas.

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Area of Science:

  • Oncology
  • Pulmonology
  • Radiology

Background:

  • Primary pulmonary lymphoma is rare and presents with varied imaging findings.
  • Accurate diagnosis can be challenging due to non-specific radiographic features.

Observation:

  • A 70-year-old male presented with a left lower lung tumor on CT, initially mimicking a lung abscess.
  • Transbronchial and CT-guided biopsies were inconclusive, leading to a presumptive diagnosis of lung abscess.
  • The tumor enlarged despite antibiotic treatment, necessitating surgical resection.

Findings:

  • Histopathological examination of the resected specimen revealed diffuse large B-cell lymphoma.
  • The tumor's central necrotic and fibrotic tissue complicated the definitive diagnosis.
  • CT findings suggested a lung abscess, contrasting with the final lymphoma diagnosis.

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Implications:

  • This case underscores the importance of surgical intervention for definitive diagnosis of ambiguous pulmonary lesions.
  • Radiographic and biopsy findings can be misleading in primary pulmonary lymphomas.
  • Increased awareness of diverse presentations of pulmonary lymphomas is crucial for timely diagnosis and treatment.