Papilloma

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Related to papillomas: Nasal Papillomas

papilloma

[‚pap·ə′lō·mə]
(medicine)
A growth pattern of epithelial tumors in which the proliferating epithelial cells grow outward from a surface, accompanied by vascularized cores of connective tissue, to form a branching structure.

Papilloma

 

a benign tumor of man and animals; its basic structural element is a connective-tissue papilla covered with epithelium and containing vessels. The growth of the papillae in various directions sometimes gives a papilloma the appearance of a cauliflower. The presence of numerous papillomas is called papillomatosis. Papillomas are most commonly found on the skin, although they sometimes occur on mucous membranes. In man, they may be congenital or may result from chronic inflammatory irritation. Some papillomas are viral in origin, for example, those of the sexual organs. The recommended therapy is surgical removal.

Papillomatosis in animals is caused by locally specific viruses. It affects cattle, horses, dogs, and rabbits and occasionally goats, sheep, and wild animals. The infection is caused by diseased animals; natural infection results from contact between diseased and healthy animals. The disease is long in duration. Isolated coral-like papillomas appear and then spread. Their surface is dry, horny, and cracked. When injured, papillomas bleed and become infected and ulcerous. Diagnosis is based on clinical and histological examination. Treatment generally consists of surgical removal.

I. I. VORONIN

References in periodicals archive ?
In contrast, peripheral papillomas arise in the terminal duct lobular units; thus, they are often clinically occult and discovered incidentally by mammographic calcifications or manifest as an enhancing mass on magnetic resonance imaging.
INTRODUCTION: Independent of the site or the type of lesion, the papilloma virus virion has a constant morphology and structure.
The nasal papilloma (NP) in its earlier days generated varied opinion among histopathologists for its nomenclature with as many as 54 synonyms and recently among molecular biologist for its etiopathogenesis.
71% of cases followed by Squamous cell papilloma, inverted papilloma.
The location of papillomas was mid esophagus in 26 (68%) patients, distal in 8 (21%), upper in 4.
Papillary lesions of the breast are a heterogeneous group of neoplasms, which includes benign intraductal papilloma (IDP) as well as papilloma with atypia (atypical papilloma) and ductal carcinoma in situ (DCIS), papillary DCIS, and variants of papillary carcinoma.
Although it is used rarely, intralesional injections of the antiviral medication cidofovir have been shown to reduce the recurrence of papillomas.
Background: Sinonasal inverted papilloma (IP) is a rare benign tumor of the nasal cavities and paranasal sinuses.
Multiple papillomas have similar features but ductal epithelial cells are more frequently associated with hyperplasia, atypia, DCIS (Fig.
There is a distinct difference in anatomic sites of involvement: Inverted and oncocytic papillomas affect the lateral nasal cavity and paranasal sinuses (ethmoid, maxillary, and frontal) (>90%), while the exophytic type tends to affect the nasal septum (>90%).
According to gross appearance, papillomas were categorized as flat or filiform type.