A 22-year-old primigravida came for a routine antenatal check up at 27 weeks of gestation. There was no history of a consanguineous marriage. There was no family history of any hereditary disease or delivery of a malformed foetus in the family. On examination, the fundal height corresponded to that seen at 30 weeks of gestation. Her obstetrics ultrasonography revealed the presence of a single live foetus with large, multicystic, multiseptate, variable sized anechoic areas in an echogenic background, which were found to involve one entire lower limb, which extended upto the ipsilateral pelvic region and were partly seen on the abdomen, on the ipsilateral side [Table/ Fig-1,2]. Colour Doppler showed no blood flow within the lesion. The other extremity appeared to be normal. No other structural anomalies were noted. Liquor was excessive. Parameters corresponded to those seen at 27 weeks of gestation. Patient went in to preterm labour at 30 weeks of gestation and delivered a baby with ambiguous genitalia. Baby showed massive oedema with congestion of right side of abdominal wall, back and whole of right lower limb, with involvement upto the toes. No other gross external malformations were noted. On autopsy, multiple sections taken from skin, which were studied, showed a cavernous lymphangioma which involved the right side of abdomen, back and right lower limb. Abdominal organs and the bones of the affected limb were normal. The foetal karyotype showed 46 XX chromosomes.