pilomatrixoma

pi·lo·ma·trix·o·ma

(pī'lō-mā'trik-sō'mă), [MIM*132600]
A benign solitary hair follicle tumor, often starting in childhood, containing cells resembling basal cell carcinoma and areas of epithelial necrosis forming eosinophilic ghost cells with variable calcification and foreign body giant cell reaction in the fibrous stroma.
[pilo- + matrix + G. -oma, tumor]

pilomatrixoma

/pi·lo·ma·trix·o·ma/ (-ma-trik´so-mah) a benign, circumscribed, calcifying epithelial neoplasm derived from hair matrix cells, manifested as a small, firm, intracutaneous spheroid mass, usually on the face, neck, or arms.

pi·lo·ma·trix·o·ma

(pī'lō-mā'trik-sō'mă)
A benign solitary hair follicle tumor containing cells resembling basal cell carcinoma and areas of epithelial necrosis.
Synonym(s): Malherbe calcifying epithelioma.
[pilo- + matrix + G. -oma, tumor]

Malherbe,

Albert, French physician, 1845-1915.
Malherbe calcifying epithelioma - a benign solitary hair follicle tumor. Synonym(s): Malherbe-Chenantais epithelioma; pilomatrixoma
Malherbe-Chenantais epithelioma - Synonym(s): Malherbe calcifying epithelioma

pilomatrixoma

a benign, circumscribed, calcifying epithelial neoplasm derived from hair matrix cells, manifested as a small firm intracutaneous spheroid mass. Kerry blue terriers have a predisposition to develop these. Called also epithelioma of Malherbe, calcifying epithelioma.
References in periodicals archive ?
An unusual presentation of giant pilomatrixoma in an adult patient.
Pilomatrixoma of the breast, a rare lesion simulating breast cancer: a case report.
Background and Design: Pilomatrixoma calcifying epithelioma of Malherbe is a rare, benign, limited, calcifying epithelial neoplasm that arises from the hair pluripotent precursor matrix cells.
3) It was Forbis and Helwig who renamed this neoplasm as pilomatrixoma in 1961 and described its origin as the hair follicle matrix.
Pilomatricoma, also referred to as pilomatrixoma and calcifying epithelioma of Malherbe, is a benign dermal-subcutaneous tumor derived from the matrix of the hair follicle.
The nonspecific features of pilomatrixoma on MRI make it difficult to diagnose.
This tumor should be considered in the differential diagnosis of head and neck lesions, which includes sebaceous cyst, implantation dermoid, neurofibroma, dermatofibroma, basal cell carcinoma, squamous cell carcinoma, pilomatrixoma, and histiocytoma.
Noguchi H, Kayashima K, Nishiyama S, Ono T: Two cases of pilomatrixoma in Turner's syndrome.
Pilomatrixoma is a rare, benign, circumscribed, calcifying epithelial neoplasm that is derived from hair matrix cells.
Auricular ossification has also been associated with inflammatory conditions such as chondritis, perichondritis, and syphilitic perichondritis, as well as with neoplasms such as nevi of the face, pilomatrixoma, and chondroid syringoma.
The objective of this article is to describe our experiences in treating patients for head and neck pilomatrixoma at our institution during a 5-year period and to compare our findings with previously published results.
Fujioka M, Gozo N, Osamu M, Tsuneyuki Y, Takehisa Y: Secondary anetoderma overlying pilomatrixomas.