鼻旁窦

鼻旁窦	bí páng dòu	paranasal sinus
鼻	bí	nose
旁	páng	one side / other / different / lateral component of a Chinese character (such as 刂, 亻 etc)
窦	Dòu	surname Dou
窦	dòu	(literary) hole; aperture / (anatomy) cavity; sinus