It’s snot too bad when they’re unclogged

I CLEARLY remember learning about the paranasal sinuses in medical school, where navigation of their dark labyrinths (metaphorically at least, for my first-year anatomy exams) felt like a pioneering speleological expedition.

All those narrow ostia to squeeze through and recesses to explore. And I always thought the crista galli and cribriform plate sound like exotic lost treasures from an Indiana Jones movie.

But as a GP, where bunged-up sinuses are both common and frustrating to treat, the shadowy alcoves of the sphenoid have

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