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Related Experiment Video

Updated: Jun 24, 2026

Identification of OTX1 and OTX2 As Two Possible Molecular Markers for Sinonasal Carcinomas and Olfactory Neuroblastomas

Identification of OTX1 and OTX2 As Two Possible Molecular Markers for Sinonasal Carcinomas and Olfactory Neuroblastomas

Published on: February 28, 2019

Primary sinonasal choriocarcinoma.

Diana M Bell¹, Gioconda Porras, Maria Eugenia Tortoledo

¹Department of Pathology, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA. diana.bell@mdanderson.org

Annals of Diagnostic Pathology

|March 24, 2009

Summary

This study reports the first two cases of primary sinonasal choriocarcinoma, a rare germ cell tumor. Early identification and specific therapy are crucial for managing this aggressive sinonasal neoplasm.

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Last Updated: Jun 24, 2026

Identification of OTX1 and OTX2 As Two Possible Molecular Markers for Sinonasal Carcinomas and Olfactory Neuroblastomas

Identification of OTX1 and OTX2 As Two Possible Molecular Markers for Sinonasal Carcinomas and Olfactory Neuroblastomas

Published on: February 28, 2019

Area of Science:

Oncology
Pathology
Otorhinolaryngology

Background:

Primary choriocarcinoma of the sinonasal tract is exceptionally rare and has not been previously documented.
Germ cell tumors typically occur in reproductive organs, but can arise in extragonadal sites.

Observation:

Two male patients presented with epistaxis and nasal obstruction.
Imaging revealed sinonasal masses, confirmed histopathologically as choriocarcinoma with cytotrophoblastic and syncytiotrophoblastic cells.
Tumors showed strong keratin and beta-chorionic gonadotrophin (HCG) positivity, with elevated serum HCG levels.

Findings:

The study documents the first two cases of primary sinonasal choriocarcinoma.
Histopathology confirmed a dual cell population characteristic of choriocarcinoma.
Immunohistochemistry and elevated serum HCG levels supported the diagnosis.

Implications:

These cases support the existence of primary choriocarcinoma in the sinonasal tract, expanding the known distribution of germ cell tumors.
Accurate diagnosis is vital for initiating appropriate, potentially life-saving, specific therapies.
Further research into the histogenesis and optimal treatment strategies for sinonasal choriocarcinoma is warranted.