Send to

Choose Destination
See comment in PubMed Commons below
Am J Clin Pathol. 2008 Aug;130(2):213-8. doi: 10.1309/TEDD2FCWH8W0H4HA.

p63 Expression in olfactory neuroblastoma and other small cell tumors of the sinonasal tract.

Author information

  • 1Robert E. Fechner Surgical Pathology Laboratory, University of Virginia, Department of Pathology, Charlottesville, VA 22908-0214, USA.


Olfactory neuroblastoma (ONB) is a rare neoplasm of the head and neck region that is included in the differential diagnosis of other sinonasal tract malignancies. We studied the usefulness of using p63 as an aid in the diagnosis of ONB and other tumors of the sinonasal region. The specimens were 14 ONBs; 4 nasopharyngeal carcinomas (NPCs), nonkeratinizing subtype; 2 NPCs, undifferentiated subtype; 10 sinonasal undifferentiated carcinomas (SNUCs); 7 malignant melanomas; and 2 extranodal natural killer (NK)/T-cell lymphomas. We observed p63 expression in 5 ONBs (36%), 4 nonkeratinizing NPCs (100%), 1 undifferentiated NPC (50%), 2 SNUCs (20%); 0 malignant melanomas (0%); and 1 extranodal NK/T-cell lymphoma (50%). While all cases of NPC with positive staining for p63 showed strong and diffuse immunoreactivity, the ONB, SNUC, and lymphoma cases with positive immunoreactivity showed only focal staining for p63. No p63 expression was observed in malignant melanoma. We think p63 is a useful marker to help distinguish nonkeratinizing or undifferentiated NPC subtypes from various sinonasal tract malignancies. In particular, p63 helps distinguish nonkeratinizing and undifferentiated NPC subtypes from SNUC.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Silverchair Information Systems
    Loading ...
    Support Center