Related Experiment Video
Updated: May 5, 2026

Enhancing Tumor Content through Tumor Macrodissection
Published on: February 12, 2022
Diffuse Large B-Cell Lymphoma With Pulmonary and Gastric Involvement Mimicking Nontuberculous Mycobacterial Lung
Kosuke Masuda1, Kazuhiro Asada1, Yuu Saitoh2
1Department of Respiratory Medicine Shizuoka General Hospital Shizuoka Japan.
Abstract:
An 81-year-old man was incidentally found to have multiple bilateral pulmonary nodules on chest computed tomography. Bronchoscopy revealed Mycobacterium intracellulare, and partial spontaneous regression of several nodules initially supported a diagnosis of nontuberculous mycobacterial lung disease. However, other nodules showed progressive enlargement during antimicrobial therapy. Surgical lung biopsy revealed diffuse large B-cell lymphoma (DLBCL), and subsequent evaluation demonstrated gastric involvement. The patient achieved complete remission after systemic chemotherapy. This case highlights the diagnostic challenge of pulmonary lymphoma presenting with heterogeneous radiological behaviour and emphasizes the importance of histological confirmation when the clinical course is atypical.
Related Concept Videos
Pulmonary Tuberculosis III
The first classification is based on the development of the disease, and it includes the following categories:
Pulmonary Tuberculosis II
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
Pulmonary Tuberculosis IV
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
Pulmonary Tuberculosis I
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Pulmonary Tuberculosis V
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the...
Atypical Pneumonia