Webster's New World Medical Dictionary

tap, joint
See 
arthrocentesis.
tap, spinal
See 
lumbar puncture.
tapeworm
A worm that is flat like a tape measure
and functions as an intestinal parasite, unable to live
freely on its own but able to live within an animal’s
gut.
tapeworm, beef
See 
beef tapeworm.
tapeworm, pork
See 
Taenia solium.
TAR syndrome
Thrombocytopenia–absent radius
syndrome, in which the platelets needed for blood
to clot normally are too few in number and the
radius (the smaller of the two bones of the forearm)
is absent, resulting in phocomelia (a “flipper”
limb). The fibula (the smaller bone in the lower
leg) is also often absent. The risk of bleeding due
to having too few platelets is high in early infancy.
In the survivors, the platelet problem lessens with
age. TAR syndrome is inherited in an autosomal reces-
sive manner. Also known as tetraphocomelia–
thrombocytopenia syndrome.
tardive dyskinesia
A neurological syndrome
characterized by repetitive, involuntary, purposeless
movements caused by the long-term use of certain
drugs called neuroleptics used for psychiatric, gas-
trointestinal, and neurological disorders. Features
may include grimacing; tongue protrusion; lip
smacking, puckering, and pursing; and rapid eye
blinking. Rapid movements of the arms, legs, and
trunk may also occur. The incidence of the syn-
drome rises with the dose and duration of drug
treatment. The treatment of tardive dyskinesis is
usually to stop or minimize the use of the offending
drug if possible. Replacing the offending drug with
substitute drugs may help.
tarsal cyst
See 
cyst, Meibomian.
tarsal gland
See 
gland, Meibomian.