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 ?
Sinonasal papillomas: Clinicopathologic review of 40 patients with inverted and oncocytic Schneiderian papillomas.
Solitary papillomas occur more commonly in women between 30 to 50 years of age, often complaining of spontaneous serous or serosanguinous nipple discharge.
A polymerase chain reaction examination for the presence of human papilloma virus (HPV), using GP5+/6+ consensus primers, was negative.
Internal papilloma disease in green-winged macaws (Ara chloroptera).
On the other hand, treatment with compound 1 (85 nM) along with DMBA/TPA inhibited the formation of papillomas up to week 7 and the percentage of papilloma-bearers in the mice of this group was 93.
The corrected sentence would then read, "Page and colleagues (30) categorize a lesion as a papilloma with DCIS, when the papilloma shows any area of uniform histology and cytology consistent with noncomedo DCIS that is greater than 3 mm in size, whereas papillomas that contain a histologically identical epithelial proliferation that is smaller or equal to 3 mm in size are classified as papillomas with atypia.
1ml) along with DMBA (100 [micro]g)/TPA (1[micro]g) inhibited the formation of papillomas up to week 8 and the percentage of papilloma bearers in this group was less than 80% at week 20 (Fig.
Intraductal papillomas are either solitary or multiple and can be benign or can contain atypical cells, as in this case.
Malignant transformation of DMBA/TPA-induced papillomas and nevi in the skin of mice selectively lacking retinoid-X-receptor [alpha] in epidermal keratinocytes Indra AK, Castaneda E, Antal MC et al.
In unprotected cells, they saw inflammation and the hallmarks of cancer: DNA damage, uncontrolled cell proliferation, and eventually precancerous growths called papillomas.