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Supplied by NHS Choices Persistent trophoblastic disease and
choriocarcinoma  Viewing video content in NHS Choices
Persistent trophoblastic disease and choriocarcinoma are very
rare and are part of a group of tumours called gestational
trophoblastic tumours (GTTs).  Persistent trophoblastic disease
occurs after a molar pregnancy. If the tissue isn't fully
removed during the original treatment, it can become cancerous.
Further treatment is then needed to ensure that all the molar
tissue is removed.  Choriocarcinoma is a very rare condition
that can happen after any pregnancy, but it's more common after
a molar pregnancy. It happens when cells left behind after a
pregnancy become cancerous. There are between 10 and 20 women
who have a choriocarcinoma in the UK each