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Related Experiment Videos

So-called primitive neuroectodermal tumor in aborted previable fetuses.

D K Kalousek1, T Pantzar, R Craver

  • 1Department of Pathology, University of British Columbia, Vancouver, Canada.

Pediatric Pathology
|January 1, 1988
PubMed
Summary
This summary is machine-generated.

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These fetal tumor-like lesions are likely artifacts, not true tumors, appearing in macerated fetuses aged 9-16 weeks. They result from brain tissue displacement, not neurofibromatosis, and are absent in fresh fetuses.

Area of Science:

  • Pathology
  • Fetal Medicine
  • Developmental Biology

Background:

  • Tumor-like lesions in previable fetuses are often mistaken for invasive neoplasms.
  • Previous literature suggested a link to fetal neurofibromatosis.

Purpose of the Study:

  • To characterize the gross and histopathologic features of 36 fetal tumor-like lesions.
  • To determine the etiology and significance of these lesions in previable fetuses.

Main Methods:

  • Gross anatomical examination of 36 fetal specimens.
  • Histopathological analysis of lesion tissues.
  • Correlation with fetal maceration status and developmental age.

Main Results:

  • Lesions were exclusively found in severely macerated fetuses aged 9-16 weeks.

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  • No evidence of true invasion or metastasis was observed.
  • The pattern suggested artifactual displacement of brain tissue.
  • No family history of neurofibromatosis was present.

    • Conclusions:

    • The described lesions are likely artifacts, not neoplastic growths.
    • Artifact formation may be related to fetal maceration, soft brain tissue, and incomplete vertebral development.
    • These findings necessitate re-evaluation of previously reported fetal tumors.