Abstract：
:Cutaneous syncytial myoepithelioma is a recently described rare tumor of the dermis. It is derived and composed purely of myoepithelial cells and shows a characteristic syncytial growth pattern of neoplastic cells with little intervening stroma and no recognizable ductal structures. It represents a diagnostic challenge to dermatopathologists given its rarity and unusual immunophenotype. Molecular testing for rearrangement of the EWSR1 gene plays a significant role in confirming the diagnosis in most cases. Herein, we present 2 cases with mundane clinical presentations and challenging histopathological findings. In both cases, the lesion was composed of relatively well-circumscribed proliferation of epithelioid and spindle cells in the superficial dermis growing in a syncytial fashion and showing focal adipocytic metaplasia. The 2 cases had slightly different immunohistochemical profiles, but shared focal positivity for S100, EMA and pan-keratin or p63. Break-apart FISH demonstrated the presence of an EWSR1 gene rearrangement confirming the diagnosis in both cases. We discuss the most important differential diagnoses, particularly melanocytic lesions and epithelioid sarcoma and the original diagnostic considerations that the cases were referred to us with. We also review the molecular features and spectrum of immunohistochemical findings in these lesions and their role in excluding entities in the differential diagnosis.
journal_name
J Cutan Patholjournal_title
Journal of cutaneous pathologyauthors
Alomari AK,Brown N,Andea AA,Betz BL,Patel RMdoi
10.1111/cup.13005subject
Has Abstractpub_date
2017-10-01 00:00:00pages
892-897issue
10eissn
0303-6987issn
1600-0560journal_volume
44pub_type
杂志文章abstract：:Cutaneous lymphadenoma is an uncommon benign neoplasm often considered to be an adamantinoid variant of trichoblastoma. Lesions present in both sexes, between 14 and 87 years of age, and are mainly located on the head and neck. Cases in children are rare and there is only 1 previous case of a congenital lymphadenoma. ...
journal_title：Journal of cutaneous pathology
pub_type：
doi：10.1111/cup.13016
更新日期：2017-11-01 00:00:00
abstract：:Imiquimod (AldaraTM), a Toll-like receptor 7 agonist (TLR7), is known for its unique properties of being an immune response modifier and stimulator. Upon topical application, this TLR7 agonist triggers a cell-mediated immune response predominantly expressed by dendritic cells and monocytes. Local skin irritation at th...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.2010.01592.x
更新日期：2011-04-01 00:00:00
abstract：:Dermatofibrosarcoma protuberans (DFSP) is a rare soft tissue tumor that arises primarily on the trunk and extremities but seldom on the scalp. Several variants of DFSP have been described, including myxoid DFSP. Although typical DFSP may have focally myxoid areas, myxoid DFSP, in which most of the stroma is myxoid, is...
journal_title：Journal of cutaneous pathology
pub_type：
doi：10.1111/cup.13130
更新日期：2018-06-01 00:00:00
abstract：:During the past decade, a group of cells located in the dermis and possessing a dendritic morphology have emerged from obscurity and become recognized as important members of the "dermal immune system". This group of cells is characterized by a considerable degree of immunophenotypic and functional heterogeneity. In t...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章,评审
doi：10.1111/j.1600-0560.1995.tb00753.x
更新日期：1995-10-01 00:00:00
abstract：:In lymph nodes, classical Hodgkin lymphoma can typically be distinguished from non-Hodgkin lymphoma (NHL) by the presence of Hodgkin and Reed-Sternberg cells that co-express CD30 and CD15. However, anaplastic large cell lymphoma (ALCL) and diffuse large B-cell lymphoma (DLBCL) can show identical features, and some cas...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.2012.01872.x
更新日期：2012-06-01 00:00:00
abstract：:Cutaneous syncytial myoepithelioma (CSM) is a recently recognized, histopathological variant of myoepithelial (ME) tumors of the skin. It is characterized by a syncytial arrangement of spindled, ovoid, and/or epithelioid cells forming a well-circumscribed, unencapsulated dermal nodule. There is a paucity of intervenin...
journal_title：Journal of cutaneous pathology
pub_type：
doi：10.1111/cup.13450
更新日期：2019-06-01 00:00:00
abstract：:Misonidazole, a hypoxic cell radiation-sensitizer, has been used in vivo to analyze its effect on normal and x-irradiated epidermis. The drug action was evaluated 3 days after being implanted subcutaneously. The response of the epidermis and especially of the basal cells to the drug alone and in combination with x-rad...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1981.tb00991.x
更新日期：1981-04-01 00:00:00
abstract：:Two cases of tubular apocrine adenoma were studied by light, histochemical, and electron microscopic methods. This benign apocrine hamartoma must be considered in the classification of appendage tumors, particularly those associated with organoid epithelial nevus, and may be confused with metastatic adenocarcinoma. Th...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1976.tb00850.x
更新日期：1976-01-01 00:00:00
abstract：:A 46-year-old man had a cystic mass on the right side of his scalp. Histological examination revealed a cystic dermal nodule composed of relatively circumscribed lobules of proliferating squamous epithelium, with atypical mitoses and dyskeratotic cells of invasive structure, which was diagnosed as proliferating tricho...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.2007.00960.x
更新日期：2008-10-01 00:00:00
abstract：BACKGROUND:Cutaneous tumor metastasis may be the first manifestation of cancer, but more often is a harbinger of advanced disease that portends an ominous prognosis. All skin accessions over the past 10 years from a large Veterans Administration (VA) hospital were reviewed. METHODS:Archived histories, glass slides, an...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.0303-6987.2004.00207.x
更新日期：2004-07-01 00:00:00
abstract：:Merkel cell carcinoma is occasionally associated with other types of cutaneous malignancies including squamous cell carcinoma, basal cell carcinoma and lentigo maligna. We report a case of Merkel cell carcinoma co-existent with sebaceous carcinoma in the right upper eyelid of a 61-year-old Japanese man. Histopathologi...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.2008.01160.x
更新日期：2009-09-01 00:00:00
abstract：:Pilomatrix (pilomatrical) carcinoma is a rare cutaneous adnexal tumor with matrical differentiation and recurrent and metastatic potential. Sarcomatoid pilomatrix carcinoma is a rare variant which shows a sarcomatoid component intermingling with the epithelial one. There are only 4 cases previously published. We prese...
journal_title：Journal of cutaneous pathology
pub_type：
doi：10.1111/cup.13151
更新日期：2018-07-01 00:00:00
abstract：:Study of 18 patients with biopsy diagnoses of eosinophilic panniculitis revealed diverse patterns of systemic disease, including Wells' syndrome, vasculitis, atopy, and erythema nodosum as well as localized panniculitis. Significant associated diseases included psychiatric illness, 6 (drug dependency, 4); atopy, 5 (as...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1986.tb00455.x
更新日期：1986-02-01 00:00:00
abstract：:The dermatological disorders associated with monoclonal gammopathies are clinically heterogeneous and may be divided into four groups with distinctive pathogenetic mechanisms (a) specific (infiltrative) disorders including primary and secondary cutaneous plasmacytoma and cutaneous lymphoplasmacytic infiltration of Wal...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章,评审
doi：10.1111/j.1600-0560.2007.00884.x
更新日期：2008-08-01 00:00:00
abstract：:In seven patients suffering from lichen planus (LP) light- and electron-microscopic 3H-thymidine (3HT) labeling studies were performed and the following results were obtained. 1. Using the light-microscope, a large number of 3HT labeled cells can be observed in the dermal infiltrate of LP. Most of the labeled nuclei b...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1977.tb00906.x
更新日期：1977-09-01 00:00:00
abstract：:Atypical cellular blue nevus (ACBN) has clinicopathologic features intermediate between typical cellular blue nevus (CBN) and the rare malignant blue nevus (MBN)/malignant melanoma (MM) arising in a CBN. Herein we report 9 cases of ACBN. The patients were caucasian (6 females and 3 males) with a mean and median age of...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1998.tb01729.x
更新日期：1998-05-01 00:00:00
abstract：:We report a hitherto undescribed unusual CD30+ clonal T-cell proliferation in a 46-year-old man with the lymphocytic variant of hypereosinophilic syndrome with a 17-year history of pruritus, generalized persistent papulonodular skin lesions and peripheral blood hypereosinophilia. A skin biopsy showed an eosinophil-ric...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/cup.12454
更新日期：2015-02-01 00:00:00
abstract：:Many patients who present with patch and early plaque stage mycosis fungoides follow an indolent course and survive for many years following diagnosis. A certain subset of patients, however, have rapidly progressive disease leading to accelerated demise. We examined 21 histologic sections from initial biopsies taken f...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1998.tb01751.x
更新日期：1998-07-01 00:00:00
abstract：:An extensive congenital melanocytic nevus is described which, in its deeper portion, had striking neurofibromatous features. At the dermal subcutaneous junction, there were prominent subendothelial collections of nevus cells in large veins. Similar findings have been described in neurofibromatosis. The apparent relati...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1979.tb01180.x
更新日期：1979-12-01 00:00:00
abstract：:We report a first case of ossifying fibromyxoid tumor of soft parts of the back, a 10 x 9.5 x 6 cm well-circumscribed elevated subcutaneous tumor demarcated by an incomplete fibrous capsule with bone formation at its base. The tumor was composed of both myxomatous areas with spindle tumor cells and pseudoalveolar stru...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1996.tb01316.x
更新日期：1996-08-01 00:00:00
abstract：:Ten patients with traumatic alopecia (trichotillomania) were being investigated histologically and, in five of them, hairs from the affected scalp area were plucked out for direct microscopic examination. Some histologic features appear to be specific markers for traumatic alopecia: empty hair ducts, plucked out hair ...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1977.tb00890.x
更新日期：1977-01-01 00:00:00
abstract：BACKGROUND:Carcinoma cuniculatum and verrucous carcinoma are both very well differentiated forms of squamous carcinoma and thus difficult to separate histologically from pseudocarcinomatous hyperplasia. The diagnosis of each often requires clinical-pathologic correlation. METHODS:We reviewed the literature on cases re...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/cup.12016
更新日期：2012-12-01 00:00:00
abstract：:Study of 14 patients with prurigo nodularis revealed that clinically the lesions were multiple, verrucous, and discrete and were set in normal-appearing skin. Microscopically, the lesions showed a vascular acanthomatous mass. The dermal nerves showed a tendency toward hyperplasia in parallel with the epidermal and vas...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1979.tb01161.x
更新日期：1979-10-01 00:00:00
abstract：:A histologically unique condition of the sweat duct was found in a miliaria-like papular eruption on the extensor surfaces of extremities of a 41-year-old female patient. The hypertrophic epithelium of the sweat duct wall consisted of extensively vacuolated clear cells. There was mild hyperkeratosis around the sweat d...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1994.tb00272.x
更新日期：1994-06-01 00:00:00
abstract：:Subungual melanoma commonly presents with solitary longitudinal melanonychia. Herein, we report the case of a patient with subungual melanoma who developed involvement of three digits by three independent primary melanomas. A 98-year-old male patient presented with a two-year history of longitudinal melanonychia on th...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.2011.01799.x
更新日期：2012-02-01 00:00:00
abstract：:Linear dermatoses are fascinating entities that likely reflect embryologically derived cutaneous mosaicism, even when they occur after childhood. Adult blaschkitis is a rare, relapsing inflammatory dermatitis that most often presents in middle age. It presents clinically as a pruritic eruption of linear papules, vesic...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/cup.12412
更新日期：2014-12-01 00:00:00
abstract：:Polarizable calcium oxalate (CaOx) crystals have been well documented in breast biopsies, generally associated with benign apocrine metaplasia. In contrast, polarizable crystals are only rarely reported in skin adnexal neoplasms. We report 3 different cases of sweat gland tumors with polarizable crystals morphological...
journal_title：Journal of cutaneous pathology
pub_type：
doi：10.1111/cup.12962
更新日期：2017-08-01 00:00:00
abstract：:A prospective, controlled epidemiologic survey performed in El Bagre, Colombia revealed a new variant of endemic pemphigus disease, occurring in a gold mining region. The disease resembled Senear-Usher syndrome, and occurred in an endemic fashion. The aim of this study is to describe the most frequent histopathologic ...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.2009.01315.x
更新日期：2010-02-01 00:00:00
abstract：:Folliculo-sebaceous cystic hamartoma (FCH) was described as an entity recently and was defined as an adnexal hamartoma, showing above all an infundibular cystic structure linked to many sebaceous lobules. Differentiation toward the inferior segment of the hair follicle also occurs, although to a markedly lesser degree...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.1998.tb01758.x
更新日期：1998-08-01 00:00:00
abstract：:Xanthogranulomas are benign lesions composed of macrophages in which some of the cells have vacuolated cytoplasm. They commonly occur in children, referred to as juvenile xanthogranulomata, and are histopathologically characterized by the presence of Touton giant cells. Xanthogranuloma can also occur in adults. A woma...
journal_title：Journal of cutaneous pathology
pub_type： 杂志文章
doi：10.1111/j.1600-0560.2010.01524.x
更新日期：2010-08-01 00:00:00
