A rhinolith usually forms around the nucleus of a small exogenous foreign body, blood clot or secretion by slow deposition of calcium and magnesium salts.
His scientific investigation proved conclusively that cornstarch was a dangerous foreign body that potentiated wound infection and was a vector for the latex allergy epidemic.
Croup is diagnosed on clinical grounds, once potentially more severe causes of symptoms have been excluded (i.e. epiglottitis or an airway foreign body).
