Abstract
The 'crazy-paving' pattern on high resolution computed tomography (HRCT) is a distinct imaging appearance that is still considered to be a radiological hallmark of pulmonary alveolar proteinosis. However, since its first description about three decades ago, more than 40 different clinical entities presenting as 'crazy-paving' patterns have been documented. This rather remarkable but uncommon imaging appearance is now considered to be a non-specific manifestation. A 62-year-old male referred for evaluation of productive cough, breathlessness and fever presented with 'crazy-paving' pattern on HRCT. Endobronchial biopsy done on presentation was consistent with the diagnosis of squamous cell carcinoma. This report highlights this atypical presentation of squamous cell carcinoma of the lung and adds to the increasing list of clinical entities presenting as a 'crazy-paving' pattern. To our knowledge, squamous cell carcinoma presenting as a 'crazy-paving' pattern on HRCT is yet to be documented.
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