Tar syndrome

an acronym for an anaemia consisting of Thrombocytopenia with Absent Radius (see aplasia (III:1), Fig. 2). The syndrome resembles Fanconis anaemia and is characterized by severe haemorrhage and skeletal abnormalities. Both radii are absent, the ulnae are shortened and the knees are dysplastic. However, the patients have five digits in the hands, as opposed to the absence of the thumb in persons with Fanconi's anaemia.

DR