Category: P

A type of jellyfish, Physalia physalis, whose tentacles contain a neurotoxin that produces a burning sensation on contact.  

Joining the portal and systemic venous circulation.  

Portography after injection of opaque material into the superior mesenteric vein. This is usually done during laparotomy.  

Radiography of the portal vein after injection of a radiopaque contrast medium.  

A radiograph of the portal vein after injection of a contrast medium.  

In radiation oncology an x-ray image used to verify the positioning of the patient within the planned treatment field.  

The pathway by which pathogens leave the body of a host (e.g., respiratory droplets, feces, urine, blood).  

A genus of gram-negative, rod-shaped, anaerobic bacteria that inhabits the oral cavity. One species, Porphyromonas gingivalis, is a common cause of gingivitis and periodontal infection.  

Porphyria caused by a disturbance in liver metabolism such as occurs following hepatitis, poisoning by heavy metals, certain anemias, and other conditions.  

A mild form of porphyria characterized by cutaneous lesions and excess protoporphyrin in the erythrocytes and feces.