Pulmonary Computed Tomography Findings in 39 Cases of Streptococcus pneumoniae Pneumonia

Attiya Haroon, Futoshi Higa, Jiro Fujita, Akira Watanabe, Nobuki Aoki, Yoshihito Niki, Jun Ichi Kadota, Katsunori Yanagihara, Mitsuo Kaku, Seiji Hori, Haley L. Cash, Shigeru Kohno

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13 Citations (Scopus)


Objective The main objective of our study was to describe the pulmonary distribution of consolidation and ground-glass opacity (GGO) in chest computed tomography (CT) scans of Streptococcus pneumoniae pneumonia. In addition, the percentage of other pulmonary abnormalities was also reported. Methods We retrospectively evaluated chest CT examinations performed between November 2008 and January 2010 in 39 patients with S. pneumoniae pneumonia. Eight patients with Haemophilus influenzae pneumonia were also included for comparison. Patients There were 19 women and 28 men with clinical symptoms of fever and productive cough and laboratory findings of leukocytosis with markedly high C-reactive protein levels. Chest X-ray scores before and after treatment were calculated. The average score before treatment was 4. The average score after treatment was 0. Parenchymal abnormalities were evaluated along with the presence of enlarged lymph nodes and pleural effusions. The distribution of parenchymal disease was also analyzed. Results The chest CT findings in the patients with S. pneumoniae pneumonia consisted primarily of consolidation (56.4%), ground-glass opacity (71.7%), interlobular reticular opacity (69.2%), centrilobular nodules (53.8%), interlobular septal thickening (46.6%), bronchial wall thickening (46.6%), lymph node enlargement (10.2%) and pleural effusion (10.2%). Segmental distribution (65.7%) was seen more frequently than nonsegmental distribution (35.9%). Abnormal findings were noticed bilaterally in 14 patients and unilaterally in 25 patients. On both the right and left sides, predominant zonal distributions were seen in the lower lobes. In contrast, among the eight patients with H. influenzae pneumonia, one patient had both segmental and nonsegmental distributions and the remaining seven patients had only segmental distributions. Conclusion In conclusion, segmental distributions of parenchymal abnormalities are more common than non-segmental distributions on chest CT scans of patients with S. pneumoniae pneumonia.

Original languageEnglish
Pages (from-to)3343-3349
Number of pages7
JournalInternal Medicine
Issue number24
Publication statusPublished - 2012


  • Chest X-ray
  • Chest computed tomography
  • Consolidation
  • Non-segmental distribution
  • Segmental distribution
  • Streptococcus pneumoniae

ASJC Scopus subject areas

  • Internal Medicine


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