Sinonasal hamartomas are benign polypoid lesions in which well-developed branching glands and/or stroma with variable participation of different mesenchymal components are present . These lesions may result from an exuberant hyperplastic reaction within the context of an inflammatory polyp. When the glands are mainly covered by ciliated respiratory epithelium the le-
Dermoid cysts of the nose constitute 5.5-12% of those of the head and neck region. More than half are detected in children 6 years old or less, and approximately a third are present at birth. They occur most commonly in the bridge of the nose and always in the midline [33, 63, 88, 254, 278]. Dermoid cysts are lined with mature keratinising squamous epithelium and contain appendages of the skin in the cyst wall, but no endoderm. The lumen is filled with cheesy, yellow-white material.
This lesion is differentiated from the very rare sinona-sal teratoma by the limited variety of tissue types and the absence of endodermal components . Epidermal inclusion cysts do not contain adnexa. Dermoid cysts of the nose should also be distinguished from en-cephalocele. We are unaware of hairy polyps occurring in the nose.
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