Pakistani city, a "rat woman

Outside a Muslim shrine in this dusty Pakistani city, a "rat woman" with a tiny head sits on a filthy mattress and takes money from worshippers who cling to an ancient fertility rite. 

Nadia, 25, is one of hundreds of young microcephalics -- people born with small skulls and protruding noses and ears because of a genetic mutation -- who can be found on the streets of Gujrat, in central Punjab province.

Officials say many of them have been sold off by their families to begging mafias, who exploit a tradition that the "rat children" are sacred offerings to Shah Daula, the shrine's 17th century Sufi saint. 

"These are God's children. We are proud to look after her," said Ijaz Hussain, the shrine's government-employed custodian, as Nadia shrieked unintelligibly and put coins in a battered wooden box at her side. 

According to local legend, infertile women who pray at Shah Daula's shrine will be granted children, but at a terrible price. The first child will be born microcephalic and must be given to the shrine, or else any further children will have the same deformity.