Pilomatricoma of the Pinna

Aroor, Rajeshwary; Somayaji, Gangadhara; Manohar, Sai

doi:10.1177/014556131309200111

Cited by 6 publications

(30 citation statements)

References 8 publications

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“…Malignant transformation is seen in local recurrence cases. 8 In the present reported case, no recurrence was seen after 6 months of follow up after complete excision.…”

Section: Discussionsupporting

confidence: 37%

Pilomatricoma in the pinna: a case report

Timna¹,

Chandrika²

2018

Int J Otorhinolaryngol Head Neck Surg

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<p class="abstract">Benign calcifying epithelioma of Malherbe or pilomatricoma is rare benign skin tumours, typically seen in head and neck region. This is supposed to arise from hair follicle matrix cells. Though head and neck is the commonest area involved by this tumour, only 4.5% cases have been reported in the pinna. Neck is most commonly involved followed by cheek, scalp, pre auricular and peri orbital areas. Here we report a case of pilomatricoma over medial surface of pinna in a 20 years old female. She had the swelling which was gradually increasing for the past 5 years. Histopathological examination following excision biopsy confirmed the diagnosis.</p><p class="abstract"> </p>

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“…Malignant transformation is seen in local recurrence cases. 8 In the present reported case, no recurrence was seen after 6 months of follow up after complete excision.…”

Section: Discussionsupporting

confidence: 37%

Pilomatricoma in the pinna: a case report

Timna¹,

Chandrika²

2018

Int J Otorhinolaryngol Head Neck Surg

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“…3 ). Five cases (31.25%) were located in the earlobe [ 10 , 12 , 13 , 14 , 15 ], followed by the helix [ 3 , 16 , 17 , 18 ] (4 cases/25%), outer ear canal [ 19 , 20 , 21 ] (3 cases/18.75%), antihelix anterior [ 22 , 23 ] (2 cases/12.5%), helical root [ 24 ], and cymba conchae [ 11 ] (1 case each/6.25%). None of those cases reported pilomatricoma on the posterior part of the antihelix as in our case.…”

Section: Discussion/conclusionmentioning

confidence: 99%

“…Pilomatricoma, which is also known as pilomatrixoma or calcifying epithelioma of Malherbe, is an uncommon benign skin adnexal tumor arising from primitive epidermal basal cells that differentiate into hair follicle matrix cells [ 1 ]. Several studies have reported a low overall incidence of this tumor, estimated to be only 0.001%–0.003% of all dermatohistopathologic samples examined and only approximately 0.12% of all cutaneous neoplasms [ 2 , 3 ]. The exact pathogenesis is unclear; however, some studies have linked it to a mutation in the CTNNB1 gene, which encodes beta-catenin, a component of cadherin protein necessary for the terminal differentiation of hair follicles [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

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Keloid-like Pilomatricoma of the Auricle: A Case Report and Review of Literature

et al. 2022

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Pilomatricoma is a rare benign skin adnexal tumor arising from hair matrix cells. It usually manifests as a firm-to-hard, well-circumscribed, nontender nodule often mistaken as a dermoid cyst. However, its clinical presentation has been reported to mimic keloid. In addition, although it occurs most frequently in the head and neck area, pilomatricoma is rarely reported on the auricle. Herein, we reported a case of pilomatricoma occurring on the posterior part of a 9-year-old girl’s auricle. Unlike classic pilomatricoma, the tumor closely resembled a keloid. Nevertheless, histological examination following excision of the tumor revealed a dermal tumor arranged in solid nests consisting of basaloid and ghost cells along with foreign body reaction, calcification, and ossification, confirming the diagnosis of pilomatricoma. The rarity, atypical clinical presentation, and unique location of this tumor contributed to the misdiagnosis of this case. Therefore, we reviewed previous cases of pilomatricoma of the auricle reported in the literature to provide a comprehensive understanding of this rare entity.

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“…Malherbe and Chenantais coined the term calcifying epithelioma of Malherbe describing its origin as sebaceous glands, however in 1961 Forbis, and Helwig gave the term PMX describing its cell of origin and Arnold coined the term pilomatricoma. [ 5 6 ] PMX is a benign cutaneous adnexal tumor having differentiation toward the hair follicle matrix with a predilection for head and neck region of children and young adults and as it is under recognized on cytology, FNAC of PMX usually results in the over diagnosis of malignancy. [ 3 ] Julian and Bowers retrospectively analyzed 209 cases of PMX and observed that the age of presentation of PMX shows a bimodal pattern with the first peak in first decade and the second in sixth decade of life with a female preponderance.…”

Section: Discussionmentioning

confidence: 99%

Fine-needle aspiration cytology of pilomatrixoma: A short series of three cases

Nigam

Singh

2014

CytoJournal

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Pilomatrixoma (PMX) (pilomatricoma, calcifying epithelioma of Malherbe) is a benign tumor with differentiation toward the hair matrix cells and is common in head and neck region. It is most commonly seen in the first two decades of life and presents as a subcutaneous, small, asymptomatic firm solitary nodule. Fine-needle aspiration cytology (FNAC) has been described as an important preoperative diagnostic investigation though on cytology the diagnosis of PMX is sometimes difficult and misdiagnosed. We describe two patients with gradually increasing asymptomatic swelling on pinna and middle finger. FNAC was done and a diagnosis of PMX was given, further confirmed by histopathological examination. The present cases highlight the importance of FNAC in considering PMX as differential diagnosis of dermal or subcutaneous nodules in locations other than head and neck. Cytopathologists who play an important role in the preliminary diagnosis should keep in mind the variability of the cellular composition of these types of lesions to avoid misdiagnosis.

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Pilomatricoma of the Pinna

Cited by 6 publications

References 8 publications

Pilomatricoma in the pinna: a case report

Pilomatricoma in the pinna: a case report

Keloid-like Pilomatricoma of the Auricle: A Case Report and Review of Literature

Fine-needle aspiration cytology of pilomatrixoma: A short series of three cases

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