Cancer is first discovered during about 1 in every 1000 pregnancies. Of these cancers diagnosed during pregnancy about 1 in 20 is a non-Hodgkin lymphoma (NHL).

This means that NHL appearing during pregnancy is extremely uncommon. As a result of this, the relatively small number of women in this situation has made it difficult to produce absolutely reliable statistics.

The spread of cancer during pregnancy to affect the unborn child is incredibly rare and has only twice ever been recorded for NHL.

This reason the lymphoma does not spread to the unborn is probably because the baby is protected both by the placenta (the organ which forms in the womb to link the baby's and the mother's blood supply) which acts as a barrier to cancer cells and also by its own immune system which identifies any maternal cancer cells which might slip through as 'foreign' and destroys them.

So you can rest assured that there is virtually no risk that your daughter's NHL might spread to her baby.