PMC5896422_01
Contrast-enhanced CT showing subglottic soft tissue mass extending at the level of C4, C5, C6, C7 vertebrae, causing marked narrowing of the airways. (a) is axial view and (b) is coronal view.
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fig1
Tracheo-laryngoscopic examination showing subglottic mass obstructing the airway.
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fig2
The patient underwent emergency tracheobronchoscopy which showed subglottic mass (Figure 2).
Histopathology showing thyroid follicles filled with colloid.
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fig3
The histopathology confirmed ectopic thyroid tissue (Figures 3-5).
Positive cytoplasmic staining with thyroglobulin immunostain confirming the thyroid origin.
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fig4
The histopathology confirmed ectopic thyroid tissue (Figures 3-5).
Positive nuclear staining with TTF-1 immunostain confirming the thyroid origin.
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fig5
The histopathology confirmed ectopic thyroid tissue (Figures 3-5).