PMC6115606_01
A - Chest radiograph done 2 months prior showing right lower lobe infiltrates. B - Chest radiograph showing persistent right lower lobe infiltrates.
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Chest radiographs from both emergency room visits showed right lower lobe alveolar infiltrates (Fig. 1A and B).
Bedside ultrasound showing dense consolidation of lung.
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A - Showing an endobronchial lesion in the right mainstem. B - Showing an endobronchial lesion completely obstructing the right main stem.
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The left bronchial tree was normal (Fig. 4A and B).
5A- Histopathology showing low-grade mucoepidermoid carcinoma. Cystic spaces with variably sized solid nests of tumor, all composed of a mixture of squamous, mucinous, and intermediate epithelial neoplastic cells; 5B- Most cells stain diffusely with p40 immunohistochemical; 5C- rare cells demonstrate intracytoplasmic mucin with a mucicarmine stain.
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Additional immunostaining was positive for p40, p63, cytokeratin (CK), and caldesmon, but negative for alpha smooth muscle actin (SMA), S100, nuclear protein in testis (NUT-1), calponin, a monoclonal muscle actin antibody (HHF-35), and sex-determining region Y box 10 (SOX-10) (Fig. 5).
Gross pathology specimen of endobronchial lesion post resection.
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Gross pathology of the tumor can be seen in Fig. 6.