Retrorectal cystic harmatoma (tailgut cyst) in an infant: case report.

We report the case of a day old infant who presented with a large cystic swelling in the sacroccoygeal area distorting the gluteal folds and displacing the anus anteriorly. Rectal examination revealed less than twenty five per cent of the lesion in retrorectal space, plain x-rays did not show any calcification. The infant had excision surgery at seven days of age and did well thereafter. Although most TGC cases were reported in adults the present case fulfills the anatomical and histological criteria for diagnosis, and it may be the first such case in a child less than one month old.