Respiratory medicine case reports · 2026
Chronic streptococcal pneumonia presenting as a chest wall mass: An unusual case of malakoplakia.
Клинический случайСтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
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Ошибки и ограничения
История · было → стало
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Al Zuwayny Ali Husam, Muppuri Meghana, Karunanathan Abiramy, Kim David, Saverimuttu Jessie
Аннотация
INTRODUCTION: Malakoplakia is a rare disorder of defective macrophage bactericidal function associated with gram-negative organisms. Pulmonary involvement is uncommon, and association with Streptococcus pneumoniae is exceedingly rare, often mimicking thoracic malignancy.
CASE: 72-year-old man with a 50-pack-year smoking history and chronic alcohol use presented with cough, dyspnea, fever, weight loss and a tender left chest wall mass. Computed tomography demonstrated a 10.9 × 6.2 cm mass traversing multiple tissue planes with mediastinal lymphadenopathy raising concern for malignancy. Cultures grew Streptococcus pneumoniae. Lung biopsy revealed Periodic Acid-Schiff positive macrophages with chronic inflammatory infiltrate and histiocytes without evidence of malignancy, confirming pulmonary malakoplakia. He received ceftriaxone followed by amoxicillin-clavulanate alongside surgical debridement, achieving clinical improvement. Re-biopsy confirmed the absence of malignancy.
CONCLUSION: This case illustrates the importance of correlating a detailed, potentially suspicious history with an appropriate and comprehensive microbiologic, surgical, radiographic, and histopathological evaluation process, which leads to a maximally effective intervention.
CASE: 72-year-old man with a 50-pack-year smoking history and chronic alcohol use presented with cough, dyspnea, fever, weight loss and a tender left chest wall mass. Computed tomography demonstrated a 10.9 × 6.2 cm mass traversing multiple tissue planes with mediastinal lymphadenopathy raising concern for malignancy. Cultures grew Streptococcus pneumoniae. Lung biopsy revealed Periodic Acid-Schiff positive macrophages with chronic inflammatory infiltrate and histiocytes without evidence of malignancy, confirming pulmonary malakoplakia. He received ceftriaxone followed by amoxicillin-clavulanate alongside surgical debridement, achieving clinical improvement. Re-biopsy confirmed the absence of malignancy.
CONCLUSION: This case illustrates the importance of correlating a detailed, potentially suspicious history with an appropriate and comprehensive microbiologic, surgical, radiographic, and histopathological evaluation process, which leads to a maximally effective intervention.