Category: C

A fistula between the intracranial space and a paranasal sinus.  

A direct communication of a pulmonary artery with a pulmonary vein within the lung. This congenital condition allows blood to bypass the oxygenation process in the lungs.  

A fistula with both external and internal openings.  

An abnormal opening into the cervix uteri.  

The fissure extending from the occipital end of the cerebrum to the occipitoparietal fissure. A fissure that consists of five deep horizontal (transverse) grooves that separate the cerebellum into its lobes and lobules.  

In radiography, a filter that shields less dense areas to produce a more nearly uniform radiographic image.  

Collagen bundles in the gingiva that surround a tooth.  

A sustained fever, as in scarlet fever, typhus, or pneumonia, with a slight diurnal variation.  

A fetus that has died in utero and become hardened by calcium salts.  

Formation of citric acid from the action of molds on carbohydrates.