Thatcher 's spokeswoman says she had a tube in her bladder removed . She is expected to be kept in the hospital overnight and is ` ` absolutely fine '' Thatcher , however , was Britain 's only female prime minister and held office from 1979 to 1990 .
Thatcher 's spokeswoman says she had a growth in her bladder removed . She is expected to be kept in the hospital overnight and is `` absolutely fine '' Thatcher , 87 , was Britain 's only female prime minister and held office from 1979 to 1990 .