Fetal posterior cranial fossa pool widening of 1.0cm at 33 weeks has the possibility of disappearing on its own, but it needs to be rechecked regularly.
Fetal posterior cranial fossa pool refers to the medullary pool of the cerebellum, which is an indicator of prenatal ultrasound examination, and the normal value should be less than 1.0cm, if the value detected exceeds 1.0cm or more, it suggests that the posterior cranial fossa pool is widened.
If the value exceeds 1.0cm, it suggests widening of the posterior cranial fossa pool. 1.0cm widening of the posterior cranial fossa pool, but not more than 1.5cm, belongs to mild widening, which can be absorbed by itself in most cases. It is recommended to observe for a week and then review the results. If the width of the posterior cranial fossa is within the normal range, no special treatment is needed and observation is sufficient.
If the posterior cranial fossa pool continues to widen, chromosomal examination and fetal cranial magnetic resonance examination are recommended to clarify the diagnosis.
Therefore, 33 weeks fetal posterior cranial fossa pool widening 1.0cm, whether it can be absorbed or not varies from person to person, it is recommended to review regularly.