Microarray Analysis of Sinus Samples From Patients With and Without Chronic Rhinosinusitis

Mucosal biopsies, endoscopically-guided brush samples of mucus, and a saline lavage taken
from the maxillary sinuses of ten CRS patients undergoing sinus surgery are analyzed using
three microarrays: 16S rRNA PhyloChip (to detect bacteria), MycoChip (to detect fungi) and
ViroChip (to detect viruses). Ten control patients with normal sinuses, as assessed by CT
scan and a sinusitis-specific survey, will have the same samples taken. The hypothesis is
that bacterial, fungal, and viral communities present in the maxillary sinus of patients with
CRS are significantly different from those patients with healthy sinuses, and that
microorganisms identified in patients with or without CRS will differ from previously
published data obtained using other techniques. Comparing diseased and control flora will
provide insight into the relative contribution of each pathogen to CRS and may guide the
development of future therapies.

Inclusion Criteria (CRS patients):

- History of CRS as defined as symptoms (nasal discharge, nasal obstruction, facial pain
and/or hyposmia) for >12 weeks despite therapy.

- Impaired CRS-specific quality of life (SNOT-20 score >1.5).

- Evidence of sinus disease on a CT scan (Lund MacKay score greater than or equal to
10).

- Patients with positive skin or RAST testing to an inhalant allergen and/or aspirin
hypersensitivity will be included. Evidence of atopy is not required but will be
recorded, along with serum IgE levels, when available.

Inclusion Criteria (Control patients):

- No history of CRS

- SNOT-20 score <1.0

- No evidence of sinus disease on preoperative imaging

Exclusion Criteria:

- Control patients with any evidence of CRS, by history, survey, or imaging criteria
would be excluded.