142 results match your criteria Trichofolliculoma

Cutaneous and Subcutaneous Tumours of Small Pet Mammals-Retrospective Study of 256 Cases (2014-2021).

Animals (Basel) 2022 Apr 8;12(8). Epub 2022 Apr 8.

Department of Pathological Anatomy, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego St. 13, 10-719 Olsztyn, Poland.

Since small mammals are gaining popularity as pets in Poland, the number of tumour samples submitted for histopathological examination is quite high. This study was a retrospective analysis of cutaneous and subcutaneous tumours in small pet mammals submitted for histopathology in 2014-2021. The analysis included 256 tumours sampled from 103 guinea pigs, 53 rats, 43 pet rabbits, 21 ferrets, 17 hamsters, 8 degus, 5 African pygmy hedgehogs, 3 Mongolian gerbils and 3 chinchillas. Read More

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Trichofolliculoma of the external auditory canal: a case report and review of the literature.

J Surg Case Rep 2022 Apr 12;2022(4):rjac147. Epub 2022 Apr 12.

Poplar Bluff Regional Medical Center, Poplar Bluff, MO, USA.

Trichofolliculoma is a rare tumor that arises from immature hair follicular tissue. In this report, we present the case of a 51-year-old man with a trichofolliculoma in the left external auditory canal. Uniquely, there was no prior trauma in this patient, despite previous trauma being hypothesized in the etiology of this tumor. Read More

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Trichofolliculoma Mimicking Squamous Cell Carcinoma.

Dermatol Pract Concept 2022 Feb 1;12(1):e2022026. Epub 2022 Jan 1.

Department of Dermatology, Andrology and Venerology, Alexandria University, Egypt.

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February 2022

Solitary asymptomatic lobular perianal nodule on an infant.

Dermatol Online J 2021 Oct 15;27(10). Epub 2021 Oct 15.

Department of Dermatology, University of Virginia, Charlottesville, Virginia, USA.

Folliculosebaceous cystic hamartoma (FSCH) is a benign lesion that presents as a solitary papule or nodule that typically affects the face and scalp of adults. A few reports have observed a congenital presentation. We present an infant boy exhibiting a tumor with overlap features between an FSCH and fibrofolliculoma in the perianal region that was first noticed at 6 months of age. Read More

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October 2021

In vivo reflectance confocal microscopic findings in a case of trichofolliculoma.

An Bras Dermatol 2022 Mar-Apr;97(2):236-239. Epub 2022 Jan 14.

Department of Pathology, Medical Faculty, Ege University, Izmir, Turkey.

Trichofolliculoma is a rare follicular hamartoma whose dermoscopic features have been scarcely reported. On the other hand, reflectance confocal microscopy features have not been described yet. In the present study, the authors report reflectance confocal microscopy features in a case of trichofolliculoma as squamous hyperplasia forming irregular finger-like protrusions around the hair follicle and papillomatous hyperplasia of the hair follicle epithelium, which correlated with histopathology. Read More

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Histopathological features of fibrous cephalic plaques in tuberous sclerosis complex.

Histopathology 2021 Oct 21;79(4):619-628. Epub 2021 Jul 21.

Department of Dermatology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.

Aims: Fibrous cephalic plaques (FCPs) in individuals with tuberous sclerosis complex (TSC) may be excised for cosmetic reasons or biopsied to confirm lesion identification and TSC diagnosis. The aim of this study was to determine the range of histopathological features of FCPs.

Methods And Results: A retrospective analysis was conducted on 119 adults with TSC. Read More

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October 2021

Trichofolliculoma in the Auricle.

Ear Nose Throat J 2021 Feb 15:145561321995599. Epub 2021 Feb 15.

Department of Otorhinolaryngology, 65413National Health Insurance Service Ilsan Hospital, Goyang, Korea.

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February 2021

Dermoscopy of intradermal melanocytic nevi with folliculosebaceous cystic hamartoma colliding with basal cell carcinoma: A case report.

J Dermatol 2021 Mar 30;48(3):e132-e134. Epub 2020 Dec 30.

Department of Dermatology, Osaka City University Graduate School of Medicine Osaka, Osaka, Japan.

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A case of folliculosebaceous cystic hamartoma.

Dermatol Ther 2021 01 3;34(1):e14719. Epub 2021 Jan 3.

Department of Pathology, Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China.

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January 2021

Nevus Lipomatosus Cutaneous Superficialis Associated with Trichofolliculoma: An Uncommon Duet of Rare Pathologies.

Int J Trichology 2020 May-Jun;12(3):132-134. Epub 2020 Aug 14.

Department of Surgery, Nazareth Hospital, Shillong, Meghalaya, India.

Nevus lipomatosus cutaneous superficialis (NLCS) and trichofolliculoma (TF) are both rare cutaneous hamartomatous lesions. However, the coexistence of NLCS and TF as a single lesion has been reported only in two other cases, that too in middle-aged individuals. We report the first case of NLCS associated with TF in pediatric age group and also, to the best of our knowledge, the first case reported from India. Read More

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Trichofolliculoma - 'troll hair' dermoscopy.

Australas J Dermatol 2021 Feb 11;62(1):90-92. Epub 2020 Sep 11.

University of New South Wales, Kensington, New South Wales, Australia.

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February 2021

Congenital trichofolliculoma: a very rare presentation.

Dermatol Online J 2020 Jul 15;26(7). Epub 2020 Jul 15.

Department of Dermatology, Kasr Alainy Faculty of Medicine, Cairo University, Cairo.

Trichofolliculoma is an uncommon hair follicle hamartoma. It usually appears during adulthood on the face or scalp as a single, asymptomatic, skin-colored papule/nodule with small protruding hairs. Histopathological features are diagnostic. Read More

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Trichofolliculoma presenting in a deployed French soldier: fuzz that keeps you warm.

BMJ Mil Health 2020 Nov 27;166(E):e75. Epub 2020 Feb 27.

Service de Dermatologie, Hôpital d'instruction des Armées Sainte Anne, Toulon, France.

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November 2020

Hair Follicle Nevus Located on the Neck: Comparison with Accessory Tragus, Cervical Chondrocutaneous Branchial Remnants and Trichofolliculoma.

Ann Dermatol 2019 Dec 31;31(6):662-665. Epub 2019 Oct 31.

Department of Dermatology, SMG-SNU Boramae Medical Center, Seoul, Korea.

Hair follicle nevus (HFN) is a rare, benign, follicular hamartoma that most frequently presents as a congenital nodule on the face. We experienced a rare case of HFN on the neck of a 14-year-old boy and performed a pilot immunohistochemical study with cytokeratin 19 (CK19) to compare the staining pattern of hair follicles in HFN and its differential diagnoses, accessory tragus, cervical chondrocutaneous branchial remnants (CCBR) and trichofolliculoma. With hematoxylin and eosin stain, HFN showed numerous tiny hair follicles in the dermis with several sebaceous and eccrine glands, and perifollicular fibrous thickening. Read More

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December 2019

Umbilicated Hairy Auricular Mass Mimicking Accessory Tragus.

Jeong Hwan Choi

J Audiol Otol 2020 Apr 10;24(2):99-102. Epub 2019 Oct 10.

Department of Otorhinolaryngology-Head and Neck Surgery, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.

Trichofolliculoma (TF) is a follicular hamartoma in which hairs protruding out of single orifice. To the best of my knowledge, only two auricular TF has been reported in the English literature. Moreover, clinically TF have been described to mimic malignancy. Read More

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A man with an itchy auricular mass lesion

Aust J Gen Pract 2018 11;47(11):785-786

MD, PhD, Department of Otorhinolaryngology – Head and Neck Surgery, College of Medicine, Chung-Ang University, Seoul, Korea.

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November 2018

Trichofolliculoma of the Eyelid Margin: A Case Report and Review of Literature.

Ophthalmic Plast Reconstr Surg 2019 May/Jun;35(3):e74-e76

Kanupriya Dalmia Ophthalmic Pathology Laboratory, LV Prasad Eye Institute, MTC Campus, Bhubaneswar, India.

Trichofolliculoma is a rare benign tumor of the skin, with distinct pilar differentiation and a predilection for the head and neck. To the best of the authors' knowledge, only 10 cases of eyelid trichofolliculoma has been described in the English literature. Moreover, these benign hair follicle lesions have been reported to clinically mimic eyelid malignancy. Read More

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January 2020

Expression of Connexin 43 (Cx43) in Benign Cutaneous Tumors With Follicular Differentiation.

Am J Dermatopathol 2019 Nov;41(11):810-818

CellCOM-SB Research Group Department, Institute for Biomedical Research of A Coruña (INIBIC), University of A Coruña (UDC), A Coruña, Spain.

Introduction: Benign cutaneous tumors with follicular differentiation are alleged to differentiate toward parts of the hair follicle. Connexin 43 (Cx43) is a gap junction protein, the tumoral role of which has been investigated in several types of tumors.

Objective: To study the pattern of expression of Cx43 in benign cutaneous tumors with follicular differentiation and to compare it with that shown by their alleged anatomical counterparts of the hair follicle. Read More

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November 2019

Dermoscopy of folliculosebaceous cystic hamartoma.

Australas J Dermatol 2019 May 24;60(2):e165-e166. Epub 2018 Oct 24.

Department of Dermatology, Venereology and Leprology, PGIMER, Chandigarh, India.

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Dermoscopy of Adnexal Tumors.

Dermatol Clin 2018 Oct 16;36(4):397-412. Epub 2018 Aug 16.

Dermatology Department, Hospital General Universitario de Alicante, ISABIAL, C/Maestro Alonso 109, 03010 Alicante, Spain.

Cutaneous adnexal tumors include lesions with apocrine, eccrine, follicular, sebaceous, and mixed differentiation. Most are benign and sporadic, although malignant forms are occasionally observed and some cases develop in the setting of inherited syndromes. These tumors often cause immense diagnostic difficulty. Read More

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October 2018

Differential diagnostic significance of epithelial and stromal CD10 expression in tumors of trichogenic origin.

J Dtsch Dermatol Ges 2018 Jun;16(6):719-728

Department of Dermatology, Venereology and Allergology, University Medical Center, Würzburg, Germany.

Background And Objectives: The histological differential diagnosis between benign trichogenic skin tumors and basal cell carcinoma may be challenging. We therefore set out to investigate whether expression of CD10, a cell surface protein with neutral endopeptidase activity, might be a suitable marker for the histological differential diagnosis of trichogenic skin tumors.

Patients And Methods: We immunohistochemically analyzed 119 cases of benign trichogenic skin tumors and basal cell carcinoma. Read More

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Collision Tumor between Trichofolliculoma and Melanocytic Nevus.

Int J Trichology 2017 Oct-Dec;9(4):181-183

Department of Pathology, Clínica Las Condes, Santiago, Chile.

Trichofolliculoma (TF) is a hamartomatous hair follicle-related tumor, clinically described as a dome-shaped papule with a central pore crossed by one or more silky white hairs. Histologically, it described as a cystic cavity containing keratinous debris, hair shaft fragments, and numerous hair follicles arising from its linings. Collision or compound tumors are a coexistence of two or more identifiable tumors in the same lesion. Read More

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November 2017

Solitary nodule with white hairs.

Cutis 2017 Aug;100(2):E1-E2

Department of Pathology and Laboratory Services, David Grant Medical Center, Fairfield, California, USA.

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Co-occurrence of steatocystoma multiplex, eruptive vellus hair cysts, and trichofolliculomas.

Cutis 2017 Jul;100(1):E23-E26

Department of Dermatology and the Department of Laboratory Medicine, Mayo Clinic, Rochester, Minnesota, USA.

An association between steatocystoma multiplex (SCM) and eruptive vellus hair cysts (EVHCs) has been recognized. Steatocystoma multiplex and EVHC have similar clinical features but distinctive histologic features. Rare cases of co-occurrence of these conditions have been known to occur on the trunk and the forehead. Read More

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Immunohistochemical dissection of cystic panfolliculoma focusing on the expression of multiple hair follicle lineage markers with an insight into the pathogenesis.

J Cutan Pathol 2017 Oct 24;44(10):861-866. Epub 2017 Jul 24.

Department of Dermatology, Kyorin University School of Medicine, Tokyo, Japan.

Panfolliculoma (PF) is a rare benign tumor with signs of differentiation toward all components of the hair follicle (HF). Cystic panfolliculoma (CPF) is a subset of PF with histological similarity to trichofolliculoma making the differential diagnosis difficult in some cases. Immunohistopathological investigations of PF have been reported; however, previous studies focused mostly on the expression profile of the outer root sheath markers. Read More

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October 2017

Chronological changes in trichofolliculoma: Folliculosebaceous cystic hamartoma is not a very-late-stage trichofolliculoma.

J Dermatol 2017 Sep 31;44(9):1050-1054. Epub 2017 Mar 31.

Division of Dermatology, Nakao Clinic, Saga, Japan.

Some authors have reported that the secondary hair follicles in trichofolliculomas (TF) undergo regressive changes and are subsequently replaced by the developed sebaceous elements, and that folliculosebaceous cystic hamartoma (FSCH) is a TF at a very late stage. In the present study, we revaluated the histopathological features of 40 TF lesions, focusing on their chronological changes. The results of the present study indicate that while the secondary follicles in the TF exhibited the hair cycle, the normal hair cycle was out of control, and tertiary hair follicles randomly developed from the involuting secondary follicles. Read More

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September 2017

Trichoadenoma of Nikolowski- A Rare Tumour with Unusual Presentation Over Vulva.

J Clin Diagn Res 2017 Jan 1;11(1):ED05-ED06. Epub 2017 Jan 1.

Associate Professor, Department of Pathology, Shaheed Hasan Khan Mewati, Government Medical College , Nalhar, Nuh, Haryana, India .

Trichoadenoma is a rare benign, slowly growing, cutaneous tumour of the hair follicle first described by Nikolowski in 1958. It presents as a non-specific nodule over the face or buttocks. However, unusual sites such as the neck, upper arm, thigh, shoulder, and shaft of the penis may also be affected. Read More

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January 2017

Genital folliculo-sebaceous cystic hamartoma: A claim of the stroma as a clue in the diagnosis of proliferations with follicular differentiation.

J Cutan Pathol 2017 May 8;44(5):504-508. Epub 2017 Mar 8.

Department of Dermatology, Fundación Jiménez Diaz, Universidad Autónoma, Madrid, Spain.

Folliculo-sebaceous hamartomas comprise a series of entities whose boundaries are imprecise. We present the clinical case of a folliculo-sebaceous cystic hamartoma of genital localization where the diagnosis was established based on the epithelial proliferation, but mostly, on the characteristic stroma. Because this lesion lacked of the cystic component, we mention the most frequent differential diagnoses and review the literature of the few cases published on this infrequent localization. Read More

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Clinicopathologic study of 90 cases of trichofolliculoma.

J Eur Acad Dermatol Venereol 2017 Mar 18;31(3):e141-e142. Epub 2016 Sep 18.

Dermatopathology and Dermatology, Faculty of Medicine, University and University Hospital of Strasbourg, Strasbourg, France.

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