Sebaceous Trichofolliculoma Research Articles

The Nevus Lipomatosus Superficialis of Face: A Case Report and Literature Review.

Nevus lipomatosus superficialis (NLS) is a hamartoma of adipose tissue, rarely reported in the past 100 years. We treated one case, and we conducted a systematic review of the literature. A 41-year-old man presented with a cutaneous multinodular lesion in the posterior region near the right auricle. The lesion was excised and examined histopathologically. To review the literature, we searched PubMed with the keyword "NLS." The search was limited to articles written in English and whose full text was available. We analyzed the following data: year of report, nation of corresponding author, sex of patient, age at onset, duration of disease, location of lesion, type of lesion, associated symptoms, pathological findings, and treatment. Of 158 relevant articles in PubMed, 112 fulfilled our inclusion criteria; these referred to a total of 149 cases (cases with insufficient clinical information were excluded). In rare cases, the diagnosis of NLS was confirmed when the lesion coexisted with sebaceous trichofolliculoma and Demodex infestation. Clinical awareness for NLS has increased recently. NLS is an indolent and asymptomatic benign neoplasm that may exhibit malignant behavior in terms of huge lesion size and specific anatomical location. Early detection and curative treatment should be promoted.

Sebaceous Trichofolliculoma of the Scrotum: A Rare Occurrence.

Sebaceous trichofolliculoma is a very uncommon skin tumour, the tumour occurred on the nose and consisted of a solitary lesion. Sebaceous trichofolliculoma occurring in patients of the scrotum is very rare; only one case has been reported to date. The patient has many small soft nodules on the scrotum for several years, then the number and the size of the nodules increased. Histological examination showed many large cystic cavities open to the skin surface and numerous sebaceous glands connected to the cavity. Plastic surgery excision or necessary skin grafting is planned for the patient until maturity is attained.

Folliculosebaceous Cystic Hamartoma: A Rare Entity

Folliculosebaceous Cystic Hamartoma (FSCH) is an uncommon cutaneous hamartomatous lesion. It is basically a tumour like malformations exhibiting abnormal overgrowth of biphasic elements i.e., epithelial and mesenchymal components that are normally found in the skin. Few other hamartomas of pilosebaceous origin are trichofolliculoma, trichodiscoma, fibrofolliculoma and pilar sheath acanthoma. Though distinct, this entity shares similar histological features to Sebaceous Trichofolliculoma (STF). Hence, a proper histological examination is must in differentiating it from STF and other clinical and histological entities. Authors hereby, describes a case of FSCH in a 37-year-old male who presented with a slow growing cystic mass on his left earlobe, an uncommon location for such lesion. The mass was excised, and a detailed histological evaluation showed a characteristic multinodular growth pattern with lobules of pilosebaceous glands forming nodules around cystically dilated follicular infundibular structures. No hair shafts were seen in the cystic cavity ruling out differential diagnosis of sebaceous hyperplasia which could have been a close mimic. The intervening stroma revealed dense collagen, sheets and lobules of adipocytes, many vascular channels filled with fibrinous deposits. Perivascular adipocytes were also noted along with few nerve tissues (perineurium). A detailed clinicopathological work-up helped in arriving at a final diagnosis of FSCH with neural component. The patient was doing well till last six months of follow-up. No recurrence of similar lesion was noted in the patient.

皮脂腺毛囊瘤一例

Sebaceous trichofolliculoma is a rare appendageal tumor that usually present as a solitary tumor mainly on the nose. Itistologically it shows a large, irregularly shaped, centrally located cavity lined by squamous epithelium and radially arranged pilosebaceous follicles connected to the cavity. We describe a case of sebaceous trichofolliculoma in an 86-year-old woman who presented with asymptornatic skin-colored papule on her nose.

Folliculosebaceous cystic hamartoma with neurofibroma: A rare association

Folliculosebaceous cystic hamartoma (FSCH) is a rare cutaneous hamartoma composed of follicular, sebaceous, and mesenchymal elements. Especially interesting is its differential with another benign tumor sebaceous trichofolliculoma with which it shares several histologic features. This case report highlights the association of FSCH with neurofibroma and discusses its possible common pathogenesis.

A Case of Late Stage Sebaceous Trichofolliculoma Showing Overlapping Features with Folliculosebaceous Cystic Hamartoma.

A Case of Late Stage Sebaceous Trichofolliculoma Showing Overlapping Features with Folliculosebaceous Cystic Hamartoma.

Advances in folliculosebaceous cystic hamartoma

Clinically, folliculosebaceous cystic hamartoma (FSCH)is uncommon and lacks distinct features. It often manifests as asymptomatic, skin-colored papules or nodules mostly distributed on the face. Histopathologically, it is a kind of hamartoma of skin appendages mainly characterized by the hyperplasia of folliculosebaceous units and mesenchymal tissues. The differential diagnosis mainly includes sebaceous trichofolliculoma and dermoid cyst. Its immunohistochemical manifestations are unspecific and associated with epithelial and non-epithelial component within the hamartoma. This paper presents an update on the knowledge about clinical and immunohistochemical manifestation of, diagnostic criteria and treatment for FSCH. Key words: Hamartoma; Epidermal cyst; Hair follicle; Sebaceous glands

Nevus Lipomatosus Superficialis with a Folliculosebaceous Component: Report of 2 Cases

Nevus lipomatosus superficialis (NLS) is an uncommon hamartomatous lesion of the skin characterized by the presence of clusters of mature fat cells among the collagen bundles of the dermis. Usually, the number of adnexal structures is reduced in NLS as compared to the normal adjacent skin, but their morphology is not altered. Nevertheless, in some instances, associated pilar abnormalities have been reported. We here report 2 cases of NLS with disorganized pilosebaceous units. The follicular structures were dilated and showed infundibular type keratinization and there were numerous mature sebaceous lobules radiating from them resembling the histology of a folliculosebaceous cystic hamartoma (FSCH) or a sebaceous trichofolliculoma. Only 2 cases of NLS with FSCH have been previously reported. Our cases represent examples of a very rare hamartomatous cutaneous lesion composed of mesenchymal and epithelial components.

A Case of Sebaceous Trichofolliculoma on the Right Cheek

Sebaceous trichofolliculoma is a rare benign tumor and represents a variant of trichofolliculoma. Up to now, only 5 cases of sebaceous trichofolliculoma were reported in Korea. It generally presents as a centrally depressed solitary tumor and occurs in areas rich in sebaceous lobules. Microscopically, it shows cystic cavities with or without keratin-filled portion and se baceous lobules. The lobules are connected to the cystic wall. We report a case of infected sebaceous trichofolliculoma on the right cheek accompanied by a unilateral microtia in a 16year-old man. The patient was treated with oral antibiotics and surgical excision. By summarizing 12 past cases, 6 Korean and 7 international, we have put together clinical features of Sebaceous trichofolliculoma. � Korean J Otorhinolaryngol-Head Neck Surg 2011;54:650-3

Folliculosebaceous Cystic Hamartoma in a Patient with Neurofibromatosis Type I

Folliculosebaceous cystic hamartoma (FSCH) is a rare cutaneous hamartoma composed of dilated folliculosebaceous units and mesenchymal elements. It presents as a papule or nodule usually on the face and scalp, rarely on the genital or trunk area. Histologically, FSCH shares several similar features to sebaceous trichofolliculoma. We report one case of FSCH misdiagnosed as a neurofibroma. He was a 38-year-old man with a neurofibromatosis type I and a nodule on his left earlobe was excised under the impression of neurofibroma. Pathological examination revealed FSCH. Although FSCH is clinically not distinctive, awareness of the lesion is important to differentiate papulonodular or cyst-like cutaneous lesions.

Folliculosebaceous cystic hamartoma of the nipple: a case report

Folliculosebaceous cystic hamartoma (FCH) is a relatively rare and recently described lesion of the skin. Mostly, it involves the skin of the head and neck area. It is considered by most authors as a form of non-neoplastic cutaneous hamartoma comprising follicular, sebaceous and stromal elements. However, few regard it as a sebaceous trichofolliculoma, i.e. a variant of trichofolliculoma. FCH of the nipple of female breast is a very rare lesion with only one previous case reported so far in the literature. We report a similar case with a brief review of the literature.

Two cases of folliculosebaceous cystic hamartoma.

Folliculosebaceous cystic hamartoma (FSCH) is a rare cutaneous hamartoma composed of dilated folliculosebaceous units associated with mesenchymal elements. Two cases of FSCH with typical histopathological features are reported. Patient 1 was a 60-year-old man presented with a normal skin-coloured asymptomatic nodule on his scalp. Patient 2 was a 70-year-old man with an asymptomatic nodule on his right auricle that had persisted for the previous 15 years. In all, 34 cases of FSCH have been reported in the English literature. Clinically, the lesions are asymptomatic, usually rubbery to firm in consistency, and usually occur on or above the neck (> 90%). Most lesions do not exceed 25 mm in diameter (> 90%). Histopathologically, FSCH shares several similar features to sebaceous trichofolliculoma, but it is usually possible to differentiate these two tumours.

Epithelial and mesenchymal hamartomatous changes in a mature port-wine stain: morphologic evidence for a multiple germ layer field defect

The port-wine stain (PWS) is a congenital cutaneous venulocapillary malformation of unknown pathogenesis. Many patients with facial PWS develop thickening with cobblestoning and nodularity during adult life. The histologic correlates of this maturational change are poorly documented and its mechanisms remain unclear. In this case study we present new histologic observations that may elucidate this phenomenon. An extensive PWS on the face of a 75-year-old man exhibited gross thickening with cobblestoning and nodularity. Histologic examination revealed not only the expected vascular abnormalities, but also a number of widely distributed epithelial, neural, and mesenchymal hamartomatous changes. Epithelial changes included epidermal nevus, sebaceous trichofolliculoma, and basaloid follicular hamartoma. Changes of connective tissue nevus, smooth-muscle hamartoma, neural hamartoma, and subcuticular hamartoma were also noted. The complex hamartomatous changes observed in the PWS of this patient involved multiple germ lines and were distributed in a widespread pattern. These changes not only offer an explanation for the skin thickening and nodularity of this patient, but also suggest a genetically determined, multilineage developmental field defect in the pathogenesis of this lesion. Further studies of other patients are necessary to understand the full implications of these findings in the late stage of PWS.

Folliculosebaceous Cystic Hamartoma

Five examples of a distinctive sebaceous malformation, designated "folliculosebaceous cystic hamartoma," form the basis of this study. Criteria are proposed for specific diagnosis of this hamartoma and for differentiation of it from sebaceous gland hyperplasia, steatocystoma, dermoid cyst of skin, and sebaceous trichofolliculoma.

A Case of Trichogenic Trichoblastoma Associated with Sebaceous Trichofolliculoma

A Case of Trichogenic Trichoblastoma Associated with Sebaceous Trichofolliculoma

Sebaceous Trichofolliculoma on Scrotum and Penis

A case of unique sebaceous trichofolliculoma on scrotum and penis is reported. Until now, this tumor has been reported as a solitary tumor only on the nose. The patient showed many small soft nodules for several years, then they became large, while some of them amassed. Histological examination showed many cystic cavities with many sebaceous follicles connected to them. No cell atypia or recurrence after excision was noted. A diagnosis of sebaceous trichofolliculoma was made based on histological findings.

Giant solitary sebaceous gland hyperplasia clinically simulating epidermoid cyst

We report an unusual case of sebaceous gland hyperplasia manifested clinically as a large solitary intracutaneous nodule, which was at first diagnosed as an epidermoid cyst. Histologically, the nodule consisted of a single large central cavity connected with numerous fully-matured sebaceous glands. We discuss the unique clinical appearance and its histopathological differential diagnosis including sebaceous adenoma, sebaceous trichofolliculoma, organoid nevus and sebaceous gland hyperplasia.