teratoma. [terâ²ÉtÅâ²mÉ] pl. teratomas, teratomata. a tumor composed of different kinds of tissue, none of which normally occurs together or at the site of the tumor. Teratomas are most common in the ovaries or testes.
The pink-colored film or ring frequently seen on showers, tubs, toilets and pet water bowls is typically caused by growth of the airborne bacteria Serratia marcesens. This harmless nuisance organism reacts with standing water and frequently forms during spring and summer months.
Causes of Blood in Stool. On the other hand, if beets havenât been on the menu in the last two days, the pink tinge in your toilet bowl may in fact be blood. This is a condition called rectal bleedingâthe medical term is hematochezia. A person with blood in the stool may be oblivious to the fact.