tar(redirected from Tar and pitch)
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tar(tahr) a dark-brown or black, viscid liquid obtained from various species of pine or from bituminous coal (coal t.). It is used for topical treatment of skin conditions, including eczema, psoriasis, and dandruff, but is toxic and carcinogenic by inhalation or ingestion.
See: thrombocytopenia-absent radius syndrome
Achilles tendon rupture; TAR loss of TA continuity due to trauma or as the endpoint of untreated Achilles tendinitis, presenting as an acute, chronic or acute on chronic condition
acute TAR rupture of the TA 2-5 cm superior to its insertion; characterized by immobility, severe pain, bruising, swelling and a palpable 'dip' in tendon continuity; the patient cannot plantarflex the ankle joint; single-leg raise and Thompson's tests are positive; immediate first-aid treatment includes RICE(P) and immobilization, with non-steroidal anti-inflammatory drugs beginning 48-72 hours postinjury; most cases require surgery to reapproximate the separated tendon and immobilization (with the ankle joint at 90°) for 4-6 weeks, then a further 4-6 weeks of intensive physiotherapy