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Related Experiment Videos

Temporal bone and sinonasal inverted papilloma: the same pathological entity?

Stella Blandamura1, Gino Marioni, Cosimo de Filippis

  • 1Department of Pathology, Head and Neck Surgery, University of Padua, Padua, Italy. stella.blandamura@unipd.it

Archives of Otolaryngology--Head & Neck Surgery
|May 22, 2003
PubMed
Summary

Temporal bone inverted papillomas show distinct protein expression patterns compared to sinonasal types. Further research is needed to confirm hormonal influences on these rare tumors.

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Area of Science:

  • Otolaryngology
  • Pathology
  • Oncology

Background:

  • Inverted papilloma of the temporal bone is exceptionally rare.
  • Schneiderian-type papillomas in the middle ear may have higher recurrence and squamous cell carcinoma association than sinonasal counterparts.

Purpose of the Study:

  • To examine apoptosis-related proteins, cell proliferation markers, and sex hormone receptors in temporal bone inverted papillomas.
  • To compare these findings with sinonasal inverted papillomas.

Main Methods:

  • Investigated 2 cases of temporal bone inverted papilloma and 6 cases of sinonasal inverted papilloma.
  • Assessed expression of p53, Mib-1, p27, and progesterone and estrogen receptors.

Main Results:

Related Experiment Videos

  • Temporal bone inverted papillomas showed varying p53 expression (4.92%–43.75%) and high p27 expression (70.53%–82.45%).
  • One temporal bone case tested positive for progesterone receptor.

    • Conclusions:

    • Progesterone receptor expression in temporal bone inverted papilloma suggests potential hormonal dependence.
    • Current data do not differentiate temporal bone and sinonasal inverted papillomas as distinct pathological entities based on the markers studied.