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1.
Dermatol Online J ; 28(2)2022 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-35670685

RESUMEN

Hydrophilic polymer embolism (HPE) is a rare iatrogenic complication of the use of polymer-coated intravascular devices, which may affect several organ systems including the skin. Herein, we present a patient who developed a cutaneous eruption with associated neurologic manifestations secondary to localized HPE. This is a potentially underdiagnosed, life-threatening complication and physicians should consider HPE when evaluating skin eruptions in patients who have undergone endovascular procedures.


Asunto(s)
Aneurisma de la Aorta Abdominal , Embolia , Procedimientos Endovasculares , Aneurisma de la Aorta Abdominal/complicaciones , Aneurisma de la Aorta Abdominal/cirugía , Embolia/etiología , Procedimientos Endovasculares/efectos adversos , Humanos , Interacciones Hidrofóbicas e Hidrofílicas , Polímeros/efectos adversos , Resultado del Tratamiento
2.
Dermatol Surg ; 47(5): 605-608, 2021 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-33905390

RESUMEN

BACKGROUND: Melanoma in situ (MIS) can have poorly defined borders and subclinical extension that makes margin control challenging. Reflectance confocal microscopy (RCM) is a promising noninvasive technique that can be used to assess subclinical spread. OBJECTIVE: To optimize surgical margins of histology-proven MIS using RCM mosaics. MATERIALS AND METHODS: Prospective review of 22 patients with histology-proven MIS who underwent RCM margin mapping prior to staged excision, between August 1, 2018, and August 13, 2020, at the Department of Dermatology, University of New Mexico, School of Medicine. RESULTS: Twenty patients (91%) had tumor clearance on the first stage using a 3-mm surgical margin after confocal margin mapping. CONCLUSION: Reflectance confocal microscopy margin mapping using the mosaic device tends to clear MIS in one stage, and the use of the handheld device may improve the accuracy for difficult anatomic areas. Current Procedural Terminology codes for RCM do not reflect the time required and complexity of the procedure. Reflectance confocal microscopy margin mapping prior to excision has the potential to decrease the number of stages needed for melanoma removal, reduce treatment time, and cost.


Asunto(s)
Márgenes de Escisión , Melanoma/cirugía , Microscopía Confocal , Neoplasias Cutáneas/cirugía , Adulto , Anciano , Carcinoma in Situ , Femenino , Humanos , Masculino , Melanoma/patología , Persona de Mediana Edad , Cirugía de Mohs , Estudios Prospectivos , Neoplasias Cutáneas/patología , Melanoma Cutáneo Maligno
3.
Pediatr Dermatol ; 38(5): 994-1003, 2021 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-34515356

RESUMEN

Hematidrosis is a disorder in which blood-tinged fluid exudes from uninjured skin or mucosa. It is often classified as an eccrine sweat disorder, though the precise mechanism-including involvement of sweat glands-has yet to be proven. In contemporary case reports, hematidrosis appears most frequently in the pediatric population, with 83% of cases in the literature since 2008 occurring in individuals 18 years old or younger. We present here a case of a 10-year-old girl with hematidrosis followed by a review of the literature, with an emphasis on the features of this condition in the pediatric population.


Asunto(s)
Hemorragia , Sudor , Adolescente , Niño , Glándulas Ecrinas , Femenino , Hemorragia/etiología , Humanos , Piel , Glándulas Sudoríparas
4.
J Craniofac Surg ; 31(6): 1760-1762, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-32472881

RESUMEN

In this report, the authors describe a child presenting at 6 months old with a rapidly expanding extracranial left temporal mass concerning for malignancy. The mass was successfully treated at 16 months with radical surgical excision. The patient was found to have a tenosynovial giant cell tumor, diffuse type, completely encased by the temporalis muscle. To our knowledge, this is the first report of a case of diffuse type tenosynovial giant cell tumor in the temporalis muscle, without articular involvement, presenting in an infant.


Asunto(s)
Tumor de Células Gigantes de las Vainas Tendinosas/cirugía , Femenino , Tumor de Células Gigantes de las Vainas Tendinosas/complicaciones , Humanos , Lactante , Sinovitis Pigmentada Vellonodular/etiología
5.
Dermatol Online J ; 26(2)2020 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-32239892

RESUMEN

Grover disease (GD) is an acquired, nonfamilial, nonimmune mediated, transient or persistent acantholytic dermatosis. Herein, we present a 72-year-old man who had clinical and histopathologic findings of GD following two weeks of treatment with vemurafenib without MEK inhibitor. The patient was successfully treated with topical emollients and a high-potency corticosteroid. Meanwhile, vemurafenib was temporarily discontinued. Drug-induced GD has increasingly been reported in patients on BRAF inhibitor monotherapy as an immune-related adverse event. The cutaneous side effects seem to arise secondary to a paradoxical activation of the mitogen-activated protein kinase signaling of BRAF inhibitor treatment, leading to keratinocyte proliferation. Although the pathogenesis of GD has not been delineated, there is suggestion of activation of T lymphocytes, particularly helper cells under the action of pro-inflammatory cytokines, resulting in proliferation of keratinocytes. Combination therapy with a MEK inhibitor appears to prevent BRAF-induced GD. Given that there is a higher prevalence of GD in patients with hematologic malignancy, a direct causal relationship between the initiation of vemurafenib therapy and development of GD in this case may be difficult to establish.


Asunto(s)
Acantólisis/inducido químicamente , Ictiosis/inducido químicamente , Leucemia de Células Pilosas/complicaciones , Inhibidores de Proteínas Quinasas/efectos adversos , Vemurafenib/efectos adversos , Acantólisis/patología , Anciano , Biopsia/métodos , Humanos , Ictiosis/patología , Leucemia de Células Pilosas/tratamiento farmacológico , Masculino , Inhibidores de Proteínas Quinasas/uso terapéutico , Proteínas Proto-Oncogénicas B-raf/antagonistas & inhibidores , Inducción de Remisión , Piel/patología , Vemurafenib/uso terapéutico
6.
Dermatol Online J ; 23(7)2017 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-29469704

RESUMEN

Congenital juvenile xanthogranuloma (JXG) is an uncommon diagnosis and even more rarely presents with ulceration. We report such a case in a two-week-old girl. Biopsy was performed to rule out any concerning entities. Adequate treatment was provided with topical petrolatum and occasional miconozole or zinc oxide; the mass spontaneously regressed. Because congenital JXG has an excellent prognosis, insight into unique presentations such as this may provide useful information and avoid unnecessary surgical interventions.


Asunto(s)
Úlcera Cutánea/etiología , Xantogranuloma Juvenil/congénito , Xantogranuloma Juvenil/diagnóstico , Biopsia , Diagnóstico Diferencial , Femenino , Humanos , Recién Nacido , Piel/patología , Xantogranuloma Juvenil/complicaciones , Xantogranuloma Juvenil/patología
7.
Mod Pathol ; 29(3): 249-58, 2016 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-26769139

RESUMEN

The host immune response has a key role in breast cancer progression and response to therapy. However, relative to primary invasive breast cancers, the immune milieu of breast ductal carcinoma in situ (DCIS) is less understood. Here, we profile tumor infiltrating lymphocytes and expression of the immune checkpoint ligand programmed death ligand 1 (PD-L1) in 27 cases of DCIS with known estrogen receptor (ER), progesterone receptor, and human epidermal growth factor 2 (HER-2) expression using tissue microarrays. Twenty-four cases were pure DCIS and three had associated invasive ductal carcinoma. Tumors were stained by immunohistochemistry for PD-L1, as well as the lymphocyte markers CD3, CD4, CD8, FoxP3, and CD20. The expression of PD-L1 by DCIS carcinoma cells and tumor infiltrating lymphocytes was determined, and the average tumor infiltrating lymphocytes per high power field were manually scored. None of the DCIS cells expressed PD-L1, but 81% of DCIS lesions contained PD-L1+ tumor infiltrating lymphocytes. DCIS with moderate-diffuse tumor infiltrating lymphocytes was more likely to have PD-L1+ tumor infiltrating lymphocytes (P=0.004). Tumor infiltrating lymphocytes with high levels of PD-L1 expression (>50% cells) were seen only in triple-negative DCIS (P=0.0008), and PD-L1-tumor infiltrating lymphocytes were seen only in ER+/HER-2-DCIS (P=0.12). The presence of PD-L1+ tumor infiltrating lymphocytes was associated with a younger mean patient age (P=0.01). Further characterization of the DCIS immune microenvironment may identify useful targets for immune-based therapy and breast cancer prevention.


Asunto(s)
Neoplasias de la Mama/inmunología , Neoplasias de la Mama/patología , Carcinoma Intraductal no Infiltrante/inmunología , Carcinoma Intraductal no Infiltrante/patología , Linfocitos Infiltrantes de Tumor/inmunología , Microambiente Tumoral/inmunología , Adolescente , Adulto , Anciano , Biomarcadores de Tumor/análisis , Femenino , Humanos , Inmunohistoquímica , Persona de Mediana Edad , Análisis de Matrices Tisulares , Adulto Joven
8.
J Cutan Pathol ; 43(8): 657-62, 2016 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-27153463

RESUMEN

BACKGROUND: Sebaceous proliferations are common and may be confused with other cutaneous neoplasms. Few useful or specific immunohistochemical markers for sebaceous differentiation are available. We incidentally observed strong factor XIIIa (Ventana clone AC-1A1 on Ventana Benchmark Ultra stainer) nuclear staining in normal sebaceous glands and hypothesized that this might be a useful marker in sebaceous proliferations. METHODS: Immunohistochemistry for factor XIIIa (AC-1A1) was performed on seven sebaceous hyperplasias, eight sebaceous adenomas, five sebaceomas, seven sebaceous carcinomas. RESULTS: Strong nuclear factor XIIIa (AC-1A1) staining was present in 100% of normal sebaceous glands, 100% of sebaceous hyperplasia, adenoma and carcinoma, and 80% of sebaceoma. Moderately or poorly differentiated squamous cell carcinomas (SCCs) (n = 26) were also stained for factor XIIIa (AC-1A1); two showed focal strong staining (8%), but the remainder showed only weak or negative staining (92%). In contrast, factor XIIIa clones from Abcam, Cambridge, MA, USA (EP3372) and Vector Laboratories, Burlingame, CA, USA (E980.1) were negative in sebocyte nuclei. CONCLUSIONS: We report the novel finding of consistent nuclear factor XIIIa (AC-1A1) staining in normal, hyperplastic and neoplastic sebocytes. Factor XIIIa (AC-1A1) is a highly sensitive marker of sebaceous differentiation. It may have potential clinical utility as a specific marker to distinguish sebaceous carcinoma from poorly differentiated SCC.


Asunto(s)
Biomarcadores de Tumor/análisis , Factor XIIIa/biosíntesis , Neoplasias de las Glándulas Sebáceas/diagnóstico , Neoplasias Cutáneas/diagnóstico , Animales , Diagnóstico Diferencial , Humanos , Inmunohistoquímica , Ratones , Glándulas Sebáceas/patología
9.
J Cutan Pathol ; 43(5): 411-7, 2016 May.
Artículo en Inglés | MEDLINE | ID: mdl-26863905

RESUMEN

BACKGROUND: Although much data have been documented on the characteristics of medical school applicants for dermatology and pathology residency programs in the United States and select medical and surgical fellowship applicants through the National Residency Matching Program, little is known about the dermatopathology applicant demographics. METHODS: We examined a 5-year pool of dermatopathology fellowship applicants from a single institution (University of Arkansas for Medical Sciences) and compiled background profile data of the applicants to characterize an 'average dermatopathology fellow' applicant. RESULTS: A total of 229 applicants over a 5-year period were included in the assessment. The majority were of pathology background with medical school and residency training based in the southern United States. One-third of the applicants had original research publications, case reports or had given an oral or poster presentation in the field of dermatopathology. CONCLUSIONS: Knowledge regarding the average applicant statistics for a dermatopathology fellowship will allow prospective applicants to evaluate their own applications for strengths and weaknesses. This will also provide institutions information regarding anticipated statistics for a competitive applicant pool.


Asunto(s)
Dermatología/educación , Educación Médica Continua , Becas , Patología Clínica/educación , Femenino , Humanos , Masculino
10.
J Cutan Pathol ; 43(10): 872-9, 2016 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-27272456

RESUMEN

Desmoplastic melanoma is an uncommon form of melanoma characterized by atypical spindled melanocytes and abundant collagen deposition. It typically presents in sun-damaged skin of the elderly as an amelanotic, indurated lesion. It has a higher tendency for local recurrence but lower risk of lymph node metastasis vs. conventional malignant melanoma. We report two cases in women aged 59 and 66 who presented with small scalp lesions clinically suggestive of alopecia. The differential diagnosis included alopecia areata, lupus erythematosus and lichen planopilaris. Biopsies performed according to alopecia protocol were reviewed at our institutions. Biopsies revealed atypical spindled and nested epithelioid melanocytes set in a sclerotic dermis with scattered lymphoid aggregates and immunohistochemical expression of S100 protein, features diagnostic of combined desmoplastic melanoma. Wide local excision with skin graft was performed on the older patient. Excision showed combined desmoplastic melanoma with a Breslow thickness of 8.5 mm with melanoma in situ identified in the adjacent epidermis. The other patient sought treatment elsewhere and was lost to follow up. These cases illustrate desmoplastic melanoma as an unusual etiology and dangerous clinical pitfall in patients with scar-like alopecia. To the authors' knowledge, these represent the second and third reported cases of desmoplastic melanoma presenting as primary alopecia neoplastica.


Asunto(s)
Alopecia , Neoplasias de Cabeza y Cuello , Melanoma , Proteínas de Neoplasias/metabolismo , Proteínas S100/metabolismo , Neoplasias Cutáneas , Anciano , Alopecia/metabolismo , Alopecia/patología , Biopsia , Femenino , Neoplasias de Cabeza y Cuello/metabolismo , Neoplasias de Cabeza y Cuello/patología , Humanos , Melanoma/metabolismo , Melanoma/patología , Persona de Mediana Edad , Neoplasias Cutáneas/metabolismo , Neoplasias Cutáneas/patología
11.
J Cutan Pathol ; 42(5): 346-52, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-25754497

RESUMEN

BACKGROUND: Cutaneous infection with the mite Sarcoptes scabiei var. hominis is associated with epidermal and dermal changes. After noting superficial fibrin thrombi in two biopsies with scabies mites, we comprehensively reviewed the histopathologic findings in scabietic infections to determine the frequency of this finding. METHODS: Twenty five biopsies of scabies infection were retrieved from the archives of our institution; only cases containing scabietic mite parts or scybala were included. The microscopic features were documented. RESULTS: Nearly half (40%) of the cases showed fibrin thrombi within vessels of the superficial dermis. Other frequent findings included dermal eosinophils (88% of cases), epidermal spongiosis (76% of cases), lymphocyte atypia (64%), a superficial and deep infiltrate (52% of cases), dermal neutrophils (52%) and endothelial cell swelling (52%). Half of the cases contained polarizable mite elements. Less commonly encountered features included extravasated erythrocytes (44%), dermal edema (32%), pink 'pigtails'(28%), intraepidermal pustules (24%), plasma cells (20%) and vasculitis (4%). CONCLUSIONS: The pathologic characteristics of scabietic infection are wide-ranging. Spongiosis, superficial and deep inflammation, and dermal eosinophils and neutrophils are seen in the majority of cases. Superficial fibrin thrombi are not uncommon in scabietic infection, and may provide a helpful diagnostic clue when mites are not visible on initial sections.


Asunto(s)
Sarcoptes scabiei , Escabiosis/sangre , Escabiosis/patología , Trombosis/parasitología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Animales , Niño , Preescolar , Eosinófilos/patología , Femenino , Fibrina/metabolismo , Humanos , Lactante , Linfocitos/patología , Masculino , Persona de Mediana Edad , Neutrófilos/patología , Escabiosis/parasitología , Piel/parasitología , Piel/patología , Trombosis/patología , Vasculitis/parasitología , Vasculitis/patología , Adulto Joven
12.
JAAD Case Rep ; 23: 99, 2022 May.
Artículo en Inglés | MEDLINE | ID: mdl-35495978

RESUMEN

[This corrects the article DOI: 10.1016/j.jdcr.2021.04.040.].

19.
Cutis ; 102(3): E2-E4, 2018 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-30372724

RESUMEN

Nevus of Ota is a blue, hyperpigmented, benign dermatosis of the skin and mucosae that most often occurs unilaterally in the distribution of the ophthalmic (V1) and maxillary (V2) branches of the trigeminal nerve. Although uncommon, association with malignant melanoma is a complication that must be considered in the evaluation of patients with nevus of Ota. Mutations in the GNAQ and BAP1 genes in patients with nevus of Ota place them at higher risk for malignant melanoma and metastasis. We report the case of a 29-year-old woman with a long-standing history of nevus of Ota who presented acutely with an intracranial melanoma as an extension of a primary uveal melanoma.


Asunto(s)
Neoplasias Encefálicas , Melanoma , Nevo de Ota , Neoplasias de la Úvea , Adulto , Neoplasias Encefálicas/complicaciones , Neoplasias Encefálicas/genética , Neoplasias Encefálicas/secundario , Neoplasias Encefálicas/terapia , Femenino , Subunidades alfa de la Proteína de Unión al GTP Gq-G11/genética , Humanos , Melanoma/complicaciones , Melanoma/genética , Melanoma/patología , Melanoma/terapia , Nevo de Ota/complicaciones , Nevo de Ota/genética , Nevo de Ota/patología , Nevo de Ota/terapia , Proteínas Supresoras de Tumor/genética , Ubiquitina Tiolesterasa/genética , Neoplasias de la Úvea/complicaciones , Neoplasias de la Úvea/genética , Neoplasias de la Úvea/patología , Neoplasias de la Úvea/terapia
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