Low-grade sinonasal adenocarcinoma
Sinonasal tract adenocarcinomas are uncommon malignant neoplasm that arises from the surface epithelium
or serous mucous glands. Three main subtypes exist: 1) low-grade (well-differentiated) 2) high-grade
(poorly-differentiated) and 3) intestinal-type. Shown here is a low-grade adenocarcinoma that shows
both glandular and papillary growth. Glands are lined by a single layer of non-ciliated cuboidal or columnar cells.
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