Olfactory Neuroblastoma with Divergent Differentiation: An Unusual Histologic Finding in a Rare Tumor.

Olfactory neuroblastoma (ONB) is a rare malignant neoplasm of the sinonasal tract that arises from olfactory epithelium. There have been reports, mainly in tumors treated with chemoradiation or with distant metastases, describing focal histologic changes of divergent cell populations within archetypal ONB. Only three cases have been reported of ONB coexisting with non-neuroendocrine tumors.

Sleep-Disordered Breathing in the Active-Duty Military Population and Its Civilian Care Cost.

A 5-year review of an active-duty service member population found increased costs, prevalence, and incidence of sleep-disordered breathing.