PMC5005220_01
A giant fibrovascular polyp in the mouth (arrow)
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Fig1
A dull, red tumor was protruding from his mouth (Fig. 1), he was experiencing dyspnea in the dorsal position, and his speech was slurred.
Endoscopic views of the polyp. a, b: A large polyp (asterisks) with two branches from the right hypopharynx on the base of tongue (arrow in a) covered almost the entire larynx and caused airway narrowing (arrow in b)
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Fig2
The tumor caused almost complete airway obstruction (Fig. 2).
Radiological findings. a, b: Contrast-enhanced computed tomography scans revealed that the tumor (arrow) occupied the oral cavity to the esophagus (a axial, b sagittal). c, d: T2-weighted magnetic resonance imaging revealed a high-intensity area within the tumor (arrow) (c axial, d sagittal)
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Fig3
T2-weighted magnetic resonance imaging (MRI) showed that the tumor had a high-intensity area (Fig. 3).
Histological findings. A forked fibrovascular polyp, with branched ends measuring 12 and 8 cm, respectively, was removed
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Fig4
The body of the tumor was smooth and dark red-brown color, and the two, branched ends of the tumor measured 12 and 8 cm, respectively (Fig. 4).
Microscopic findings. The polyp consisted of fibro-adipose tissues (white arrows) and blood vessels (gray arrows) covered by normal squamous cell epithelium (black arrows). Magnification,  x 20; Hematoxylin-eosin stain
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Fig5
Microscopically, the polyp consisted of a fibro-adipose tissue and blood vessels covered with normal squamous cell epithelium (Fig. 5).