Cancer Stem Cell Characterization in Olfactory Neuroblastoma Tissue.

Area of Science:

• Oncology
• Pathology

Background:

• Olfactory neuroblastoma (ONB) is a rare malignancy.
• Cancer stem cells (CSCs) are implicated in tumor initiation and progression.
• The role of CSCs and PD-L1 expression in ONB is not well-defined.

Purpose of the Study:

• To investigate the presence and characteristics of cancer stem cells in olfactory neuroblastoma.
• To determine the association between cancer stem cells and PD-L1 expression in ONB.

Main Methods:

• Immunohistochemistry was employed to detect cancer stem cells markers.
• PD-L1 expression was assessed using immunohistochemical staining.
• Correlation analysis was performed between CSCs and PD-L1 positivity.

Main Results:

• Cancer stem cells were infrequently identified in the olfactory neuroblastoma samples analyzed.
• A significant proportion of the identified cancer stem cells exhibited positive PD-L1 expression.
• The presence of CSCs, though uncommon, was associated with PD-L1 positivity.

Conclusions:

• Cancer stem cells are uncommon in olfactory neuroblastoma.
• When present, cancer stem cells in olfactory neuroblastoma are more likely to be PD-L1-positive.
• PD-L1 expression on CSCs may represent a potential therapeutic vulnerability in olfactory neuroblastoma.