The authors report a case of a 5 year old child suffering from isolate
d sacral tuberculosis which presented as sudden and total loss of func
tion of the left leg. The rarity of this bony site, and the recurrence
at nine months of a presacral abscess after 9 months of anti-tubercul
ous treatment in an HIV negative child, vaccinated with BCG, justify t
he presentation of this observation.