Category: A

The volume of gas in alveoli that are ventilated but not perfused, or ventilated but not fully perfused.  

A by-product of the degradation of blood clots, specifically, of the fibrin within a clot. The presence of an elevated level of D-dimer in the setting of a suspected pulmonary embolus or deep venous thrombosis is justification for further testing. The absence of D-dimer in plasma is used to help exclude a diagnosis of deep…

A center for daytime supervision of adults. These centers provide supervised social, recreational, and health-related activities, usually in a group setting. The centers permit caregivers a respite and free them for other activities (work, play, appointments, socialization) during the day.  

A cyst lined with epithelium that proliferates, forming projections that extend into the cavity of the cyst.  

An anomalous cavity of the brain that communicates with the ventricular system.  

Dilation and rupture of pulmonary alveoli to form air cysts.  

A cyst formed around a foreign body.  

Menstrual cycle in which ovulation is absent.  

A layer of salivary products, bacteria, and food debris on the surface of the teeth; not a true cuticle.  

A sharp bending of the vertebral column.