'Crazy paving appearance' on high resolution CT in various diseases

Sadayuki Murayama, Junji Murakami, Hidetake Yabuuchi, Hiroyasu Soeda, Kouji Masuda

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)


Purpose: The purpose of this work was to demonstrate the variety of causes of crazy-paving appearance (CPA) on high resolution CT (HRCT). Method: To identify cases exhibiting CPA (ground-glass opacity with superimposed interlobular septal thickening and intralobular interstitial thickening) on HRCT, we prospectively searched for them over a period of 29 months. Results: We identified 10 cases of CPA on HRCT, including 4 Pneumocystis carinii pneumonia, I alveolar proteinosis, 1 usual interstitial pneumonia, 1 pulmonary hemorrhage, 1 acute radiation pneumonitis, 1 adult respiratory distress syndrome, and 1 drug-induced pneumonitis. Conclusion: CPA can result from a variety of diseases. When we encounter CPA on HRCT, clinical information is necessary for differentiation of these entities.

Original languageEnglish
Pages (from-to)749-752
Number of pages4
JournalJournal of Computer Assisted Tomography
Issue number5
Publication statusPublished - Oct 13 1999

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging


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