Hairy Polyp
Bruce M. Wenig, MD
Key Facts
Terminology
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Developmental (congenital) anomaly predominantly composed of ectodermal and mesodermal tissue
Etiology/Pathogenesis
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Presence of skin suggests classification as choristoma
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Possibly of 1st branchial arch origin
Clinical Issues
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Occurs in newborns or infants
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Difficulties in breathing, swallowing, or sucking
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Cured following surgical resection
Microscopic Pathology
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Combination of various ectodermal and mesodermal tissues including
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Skin (keratinizing squamous epithelium) and cutaneous adnexa
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Cartilage, bone, muscle, fibrous tissue, mature adipose tissue, vascular tissue
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Hairy polyp is also known as a nasopharyngeal dermoid. This lesion occurred in a neonate with airway obstruction and appears as a polypoid solid mass with identifiable hairs on the surface. |
The histology of hairy polyp includes a combination of ectodermal and mesodermal tissues, such as keratinizing squamous epithelium  , adnexal structures  , and cartilage  . |
TERMINOLOGY
Synonyms
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Nasopharyngeal dermoid or teratoid lesion
Definitions
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Developmental (congenital) anomaly predominantly composed of ectodermal and mesodermal tissue but lacking endodermal-derived tissues
ETIOLOGY/PATHOGENESIS
Developmental Anomaly
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Proposed classification includes
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1st branchial arch origin
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Presence of skin, including hair follicles and sebaceous glands and identification of elastic cartilage
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Findings identical to those of congenital accessory auricles akin to accessory tragus, which is of 1st branchial arch origin
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