Related Experiment Video
Updated: Sep 2, 2026
Isolation, Culture, Characterization, and Differentiation of Human Muscle Progenitor Cells from the Skeletal Muscle Biopsy Procedure
Published on: August 23, 2019
Enzyme histochemical characterization of chordomas
Abstract:
The differential diagnosis of chordoma includes chondrosarcoma and ependymoma. We describe four cases of chordoma characterized by enzyme histochemistry in plastic-embedded sections. All the chordomas exhibited strong 5'-nucleotidase positivity localized on the plasma membrane. None of the fetal notochord remnants, chondrosarcomas, ependymomas, or chondroid chordomas tested showed such a reaction. The lack of similarity in enzyme staining between fetal notochord and chordomas is unexpected since notochord has been traditionally regarded as the source of chordomas. This staining pattern provides a marker that can be useful in differentiating chordoma from other neoplasms which have a similar appearance by light microscopy.
Insights
Chordoma diagnosis can be improved using enzyme histochemistry. A specific 5'-nucleotidase marker helps differentiate chordoma from similar tumors like chondrosarcoma and ependymoma.
Area of Science:
- Oncology
- Pathology
- Biochemistry
Background:
- Chordoma diagnosis involves differentiating it from similar neoplasms such as chondrosarcoma and ependymoma.
- Enzyme histochemistry in plastic-embedded sections offers a potential diagnostic tool.
Observation:
- Four cases of chordoma were analyzed using enzyme histochemistry.
- Chordomas displayed strong 5 -nucleotidase positivity on the plasma membrane.
Findings:
- A distinct 5 -nucleotidase staining pattern was observed in chordomas.
- This reaction was absent in fetal notochord remnants, chondrosarcomas, ependymomas, and chondroid chordomas.
- The enzyme staining suggests a divergence from the traditionally assumed notochordal origin of chordomas.
Implications:
- This enzyme histochemistry marker can aid in the differential diagnosis of chordoma.
- It provides a valuable tool for distinguishing chordoma from morphologically similar tumors.
- Further research into the biochemical pathways of chordoma may be warranted.
