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Fetal ependymoma associated with Down's syndrome
Christian H Rickert1, Helga Göcke, Werner Paulus
1Institute of Neuropathology, University Hospital Münster, Germany. rickchr@uni-muenster.de
Acta Neuropathologica
|February 12, 2002
Summary
This study reports the first case of a fetal ependymoma in a fetus with Down syndrome (DS). The rare brain tumor was incidentally discovered during autopsy, highlighting a potential association.
Area of Science:
- Neuro-oncology
- Developmental biology
- Genetics
Background:
- Down syndrome (DS) is linked to increased childhood leukemia risk, but solid tumors, including brain tumors, are less common.
- Brain tumors in DS patients are typically reported in children and young adults, often as sporadic cases.
Observation:
- This case details the first documented ependymoma associated with Down syndrome.
- The tumor was found incidentally in a female fetus with DS at 19 weeks gestation during autopsy.
- The ependymoma, measuring 3x2x1 mm, was attached to the medulla oblongata.
Findings:
- Histological examination revealed a well-demarcated ependymoma with perivascular pseudorosettes.
- Immunohistochemistry showed strong GFAP reactivity and no synaptophysin expression.
- The Ki67/MIB-1 proliferation index was low at 0.5%, indicating slow growth.
Implications:
- This finding expands the spectrum of tumors associated with Down syndrome.
- It represents the youngest reported case of a brain tumor in a DS patient and the first fetal ependymoma in the English literature.
- Further research may explore the specific mechanisms linking DS and ependymoma development.