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1.
Dermatol Surg ; 47(4): 489-494, 2021 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-33165070

RESUMO

BACKGROUND: Vaginal rejuvenation is a topic of interest to multiple specialties, including dermatologists, plastic and reconstructive surgeons, urologists, and gynecologists. Evidence suggests that minimally invasive, energy-based devices-radiofrequency and laser therapy-are effective at vaginal tightening and decreasing symptoms of genitourinary syndrome of menopause (GSM) and/or vulvovaginal atrophy (VVA). MATERIALS AND METHODS: A systematic review was completed using PubMed in November 2018 with search terms "vaginal" or "vagina" and "rejuvenation" or "tightening" or "laxity" or "radiofrequency" or "laser," as well as "genitourinary syndrome of menopause," "pelvic prolapse," "atrophic vaginitis," "vulvovaginal atrophy," "sexual function," "urinary incontinence," and "radiofrequency" or "laser." Inclusion criteria were articles written in English and clinical trials or case reports/series dealing with human subjects. RESULTS: We identified 59 studies (3,609 women) treated for vaginal rejuvenation using either radiofrequency or fractional ablative laser therapy. Studies report improvement in symptoms of GSM/VVA and sexual function, high patient satisfaction, and minor adverse events, including treatment-associated pain, swelling, or vaginal discharge. CONCLUSION: This review demonstrates radiofrequency and laser are efficacious for the treatment of vaginal laxity and/or atrophy. Further research needs to be completed to determine which specific pathologies can be treated, if maintenance treatment is necessary, and long-term safety concerns.


Assuntos
Técnicas de Ablação/instrumentação , Terapia a Laser/métodos , Lasers de Estado Sólido/uso terapêutico , Satisfação do Paciente , Rejuvenescimento , Vagina/cirurgia , Desenho de Equipamento , Feminino , Humanos
2.
Dermatol Online J ; 24(3)2018 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-29634895

RESUMO

Gel manicures have become a popular beauty trend in recent years. The specially formulated nail polish must undergo curing under light-based units. The majority of these curing lamps emit high-intensity ultraviolet A, which can cause skin damage and increase the risk for skin cancers. Incorporating relevant information in patient education endeavors can help them practice avoidance, apply broad-spectrum sunscreen prior, or use nitrile exam gloves in order to prevent photoaging and skin cancer resulting from these procedures.


Assuntos
Cosméticos/efeitos adversos , Unhas , Educação de Pacientes como Assunto/métodos , Neoplasias Cutâneas/prevenção & controle , Protetores Solares/efeitos adversos , Raios Ultravioleta/efeitos adversos , Humanos , Unhas/efeitos dos fármacos , Unhas/patologia , Unhas/efeitos da radiação , Neoplasias Cutâneas/etiologia
3.
Dermatol Surg ; 44(3): 323-329, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29293108

RESUMO

BACKGROUND: Breast implantation is an increasingly common procedure for both cosmesis and reconstruction. Risk of cutaneous reactions to breast implants is low and typically described in postsurgical settings. Adverse skin hypersensitivity-like reactions to implants have also been reported but are not well described. OBJECTIVE: To review the scientific literature on cutaneous hypersensitivity-like reactions to breast implants. METHODS: A systematic literature review was conducted using PubMed. Articles pertaining to breast implants and cutaneous hypersensitivity-like reactions in humans were included. RESULTS: In total, 10 studies on hypersensitivity-like reactions from breast implants were included in the review. Potential allergenic compounds in breast implants include silicone, polyurethane texturing, and acellular dermal matrix. Perivascular lymphocytic infiltrate was a common finding on histopathology. Patch testing and preoperative silicone cube implantation were used to determine sensitivity. Attempted treatments included topical and oral corticosteroids, montelukast and antibiotics. Most cases required implant removal for resolution of symptoms. CONCLUSION: Cutaneous hypersensitivity-like reactions to breast implants seem to be rare complications, sometimes necessitating implant removal. Future studies are needed to establish their incidence and etiology, and the diagnostic role of patch testing and preoperative screening.


Assuntos
Implantes de Mama/efeitos adversos , Dermatite Atópica/etiologia , Dermatite Atópica/diagnóstico , Dermatite Atópica/patologia , Feminino , Humanos , Mamoplastia/efeitos adversos , Testes do Emplastro
4.
Dermatol Ther ; 30(6)2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-29152831

RESUMO

Angiokeratomas can present therapeutic challenges, especially in cases of extensive lesions, where traditional surgical methods carry high risks of scarring and hemorrhage. Argon, pulsed dye (PDL), neodymium-doped yttrium aluminum garnet (Nd:YAG), copper vapor, potassium titanyl phosphate, carbon dioxide, and erbium-doped yttrium aluminum garnet (Er:YAG) lasers have emerged as alternative options. To review the use and efficacy of lasers in treating angiokeratomas. A PubMed search identified randomized clinical trials, cohort studies, case series, and case reports involving laser treatment of cutaneous angiokeratomas. Twenty-five studies were included. Quality ratings were assigned using the Oxford Centre for Evidence-Based Medicine scheme. Several laser modalities are effective in treating multiple variants of angiokeratomas. Vascular lasers like PDL, Nd:YAG, and argon are the most studied and of these, PDL offers the safest side effect profile. Nd:YAG may be more effective for hyperkeratotic angiokeratomas. Combination treatment with multiple laser modalities has also demonstrated some success. Lasers are a promising treatment option for angiokeratomas, but current use is limited by the lack of treatment guidelines. There are limited high quality studies comparing laser treatments to each other and to non-laser options. Additional studies are needed to establish guidelines and to optimize laser parameters.


Assuntos
Angioceratoma/cirurgia , Terapia a Laser/instrumentação , Lasers de Corante/uso terapêutico , Lasers de Gás/uso terapêutico , Lasers de Estado Sólido/uso terapêutico , Neoplasias Cutâneas/cirurgia , Angioceratoma/patologia , Desenho de Equipamento , Humanos , Terapia a Laser/efeitos adversos , Lasers de Corante/efeitos adversos , Lasers de Gás/efeitos adversos , Lasers de Estado Sólido/efeitos adversos , Neoplasias Cutâneas/patologia , Resultado do Tratamento
5.
Arch Gynecol Obstet ; 296(3): 397-404, 2017 09.
Artigo em Inglês | MEDLINE | ID: mdl-28643027

RESUMO

PURPOSE: To assess the clinical presentation, treatment modalities, and outcome of primary melanomas arising in ovarian cystic teratomas (OCT). METHODS: A systematic review on PubMed/MEDLINE was performed on June 5, 2017, to gather data on patients with primary melanomas arising in OCTs. No systematic reviews were identified. Consequently, only case reports and case series of individuals were analyzed. A total of 37 articles met our inclusion criteria, totaling 41 unique patients. RESULTS: The average age of diagnosis was 51.5 years. In total, 24% of patients were found to have metastatic disease. In total, 56.7% of patients eventually died of their disease, with an average time from diagnosis to death of 9.3 months. Disease recurrence was common, occurring in 65% of patients. The mainstay of treatment was surgical in 100% of the cases. Adjuvant chemotherapy, immunotherapy, and radiation were also used with varying degrees of efficacy. CONCLUSIONS: Malignant melanoma arising in OCT is a rare disease with poor prognosis. The current mainstay treatment is surgical. Potential benefits of targeted therapy, immunotherapy, and chemotherapy remain to be determined. A limitation of this study is that these melanomas have only been published in case reports.


Assuntos
Melanoma/secundário , Neoplasias Ovarianas/patologia , Teratoma/patologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Quimioterapia Adjuvante , Criança , Feminino , Humanos , Imunoterapia , Melanoma/patologia , Melanoma/terapia , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/tratamento farmacológico , Recidiva Local de Neoplasia/patologia , Recidiva Local de Neoplasia/cirurgia , Recidiva Local de Neoplasia/terapia , Segunda Neoplasia Primária/patologia , Segunda Neoplasia Primária/terapia , Radioterapia , Resultado do Tratamento
6.
Int J Dermatol ; 56(8): 801-810, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28378336

RESUMO

Alopecia areata (AA) is an autoimmune disease directed at the hair follicle. Although usually limited to patchy hair loss over the scalp (focalis), AA can present as total loss of scalp hair (totalis; AT) or as total loss of both scalp and body hair (universalis; AU). Management of AT and AU can be challenging, and although multiple treatment modalities have been explored, no therapy is currently FDA-approved. This review focuses on the evidence for current treatment options for AT and AU. The PubMed database was searched from January 1, 2000, to September 1, 2016, for clinical trials, retrospective studies, and case reports of treatments for AT and AU. A total of 40 studies were retrieved and analyzed. Therapies studied for AT/AU included: topical immunotherapy, steroids, photodynamic therapy, immunosuppressive agents, TNFα inhibitors, and other therapies, such as sulfasalazine, bexarotene, JAK inhibitors, and simvastatin/ezetimibe. Although certain treatments showed significant hair regrowth, no treatment was completely effective. The most promising therapies with the highest quality data include diphenylcyclopropenone, squaric acid dibutylester, photodynamic therapy, steroids, and cyclosporine in combination with methylprednisolone. High-quality randomized-controlled trials with large sample sizes are lacking. Unified outcome guidelines are encouraged to facilitate the comparison of future studies.


Assuntos
Alopecia/tratamento farmacológico , Glucocorticoides/uso terapêutico , Fatores Imunológicos/administração & dosagem , Fotoquimioterapia , Administração Cutânea , Administração Oral , Humanos , Fator de Necrose Tumoral alfa/antagonistas & inibidores
7.
Dermatol Surg ; 43(6): 765-770, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28291064

RESUMO

BACKGROUND: Primary male genital melanomas are rare. Of these, scrotal melanoma is the least common, and is unfortunately often detected late in the disease course. OBJECTIVE: To assess the clinical presentation, treatment modalities, and outcome of scrotal melanoma to aid clinician management. METHODS: Systematic literature review of PubMed, yielding 23 cases, of which 20 met the inclusion criteria. RESULTS: Although previously thought to have the best outcome of genitourinary melanomas, scrotal melanomas are associated with high mortality and late presentation. Scrotal melanoma presented as Stage I/II disease 18.75% of the time, Stage III 56.3% of the time, and Stage IV 25% of the time, whereas typical cutaneous melanoma presents as Stage I/II disease 84% of the time, Stage III 8% of the time, and Stage IV 4% of the time. Half of patients experienced recurrence of their disease. All patients who presented with metastases to distant organs died. LIMITATIONS: Small sample size. Few cases described a Breslow's depth making it difficult to draw conclusions on tumor thickness and survival outcome. CONCLUSION: Scrotal melanoma is rare, aggressive, and is often caught late in the disease course. The authors encourage dermatologists to educate patients and destigmatize genital lesions to increase the likelihood of earlier detection and better patient outcomes.


Assuntos
Neoplasias dos Genitais Masculinos/diagnóstico , Neoplasias dos Genitais Masculinos/cirurgia , Melanoma/diagnóstico , Melanoma/cirurgia , Escroto , Neoplasias Cutâneas/diagnóstico , Neoplasias Cutâneas/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Humanos , Masculino , Pessoa de Meia-Idade , Resultado do Tratamento
8.
Dermatol Online J ; 23(3)2017 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-28329513

RESUMO

Full-body skin exams (FBSE) play an integral role inearly detection and treatment of skin cancer. Promptdetection of melanoma is especially importantas survival outcomes decrease significantly withpresentation of advanced disease. Given thatmelanoma may grow in areas of skin with little to nosun exposure, genital melanomas are a recognizedentity in cutaneous oncology.


Assuntos
Neoplasias dos Genitais Femininos/diagnóstico , Neoplasias dos Genitais Masculinos/diagnóstico , Melanoma/diagnóstico , Neoplasias Cutâneas/diagnóstico , Detecção Precoce de Câncer/métodos , Feminino , Neoplasias dos Genitais Femininos/epidemiologia , Neoplasias dos Genitais Masculinos/epidemiologia , Humanos , Masculino , Melanoma/epidemiologia , Educação de Pacientes como Assunto , Exame Físico , Neoplasias Cutâneas/epidemiologia
9.
Lasers Surg Med ; 49(6): 555-562, 2017 08.
Artigo em Inglês | MEDLINE | ID: mdl-28333369

RESUMO

IMPORTANCE: Improvements in skin appearance resulting from treatment with fractionated picosecond-lasers have been noted, but optimizing the treatment efficacy depends on a thorough understanding of the specific skin response. The development of non-invasive laser imaging techniques in conjunction with laser therapy can potentially provide feedback for guidance and optimizing clinical outcome. OBJECTIVE: The purpose of this study was to demonstrate the capability of multiphoton microscopy (MPM), a high-resolution, label-free imaging technique, to characterize in vivo the skin response to a fractionated non-ablative picosecond-laser treatment. DESIGN, SETTING, AND PARTICIPANTS: Two areas on the arm of a volunteer were treated with a fractionated picosecond laser at the Dermatology Clinic, UC Irvine. The skin response to treatment was imaged in vivo with a clinical MPM-based tomograph at 3 hours and 24 hours after treatment and seven additional time points over a 4-week period. MAIN OUTCOMES AND MEASURES: MPM revealed micro-injuries present in the epidermis. Pigmented cells were particularly damaged in the process, suggesting that melanin is likely the main absorber for laser induced optical breakdown. RESULTS: Damaged individual cells were distinguished as early as 3 hours post pico-laser treatment with the 532 nm wavelength, and 24 hours post-treatment with both 532 and 1064 nm wavelengths. At later time points, clusters of cellular necrotic debris were imaged across the treated epidermis. After 24 hours of treatment, inflammatory cells were imaged in the proximity of epidermal micro-injuries. The epidermal injuries were exfoliated over a 4-week period. CONCLUSIONS AND RELEVANCE: This observational and descriptive pilot study demonstrates that in vivo MPM imaging can be used non-invasively to provide label-free contrast for describing changes in human skin following a fractionated non-ablative laser treatment. The results presented in this study represent the groundwork for future longitudinal investigations on an expanded number of subjects to understand the response to treatment in different skin types with different laser parameters, critical factors in optimizing treatment outcome. Lasers Surg. Med. 49:555-562, 2017. © 2017 Wiley Periodicals, Inc.


Assuntos
Epiderme/efeitos da radiação , Lasers de Estado Sólido , Microscopia de Fluorescência por Excitação Multifotônica , Epiderme/diagnóstico por imagem , Voluntários Saudáveis , Humanos , Projetos Piloto
10.
Dermatol Surg ; 43(7): 934-939, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28346255

RESUMO

BACKGROUND: Dermatologists are at potential risk of acquiring infections from contamination of the mucous membranes by blood and body fluids. However, there are little data on splash safety during procedural dermatology. OBJECTIVE: To determine dermatology resident perceptions about splash risk during dermatologic procedures and to quantify the rate of protective equipment use. METHODS: An anonymous on-line survey was sent to 108 United States ACGME-approved dermatology residency programs assessing frequency of facial protection during dermatologic procedures, personal history of splash injury, and, if applicable, reasons for not always wearing facial protection. RESULTS: A total of 153 dermatology residents responded. Rates of facial protection varied by procedure, with the highest rates during surgery and the lowest during local anesthetic injection. Over 54% of respondents reported suffering facial splash while not wearing facial protection during a procedure. In contrast, 88.9% of respondents correctly answered that there is a small risk of acquiring infection from mucosal splash. Residency program recommendations for facial protection seem to vary by procedure. CONCLUSION: The authors' results demonstrate that although facial splash is a common injury, facial protection rates and protective recommendations vary significantly by procedure. These data support the recommendation for enhanced facial protection guidelines during procedural dermatology.


Assuntos
Líquidos Corporais , Dermatologia/métodos , Face , Internato e Residência , Exposição Ocupacional/prevenção & controle , Saúde Ocupacional , Equipamentos de Proteção , Atitude do Pessoal de Saúde , Atitude Frente a Saúde , Feminino , Humanos , Masculino , Fatores de Risco , Estados Unidos
11.
J Am Acad Dermatol ; 76(4): 695-702, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27955934

RESUMO

BACKGROUND: Facial port-wine stains (PWS) are considered by some an aesthetic skin problem, yet impact on quality of life (QoL) has not been objectively documented. OBJECTIVE: We sought to (1) characterize the effect of PWS on QoL in adults, (2) to identify the clinical and demographic factors that affect QoL, and (3) to compare our results with QoL studies in other skin conditions. METHODS: In total, 244 adults with facial PWS completed an online QoL survey, which included the Skindex-29 instrument. RESULTS: QoL in adults with facial PWS was diminished, especially from an emotional perspective. Variables associated with reduced QoL in all Skindex-29 subdomains included comorbid depression, limited facial mobility, and presence of other skin conditions. Persons with hypertrophy had more emotional and symptomatic impairment. The composite dermatologic-specific QoL scores were similar to those of cutaneous T-cell lymphoma, rosacea, alopecia, and vitiligo. LIMITATIONS: Selection bias was a potential limitation, as participants were primarily recruited from patient support groups. CONCLUSION: Our analysis demonstrates that the presence of a facial PWS has a significant negative impact on QoL. Dermatologists caring for patients with PWS should inquire about QoL, provide appropriate support and resources, and consider QoL when discussing treatment options and obtaining authorization for these procedures.


Assuntos
Dermatoses Faciais/psicologia , Mancha Vinho do Porto/psicologia , Qualidade de Vida , Adulto , Transtorno Autístico/epidemiologia , Comorbidade , Emoções , Estética , Dermatoses Faciais/epidemiologia , Feminino , Humanos , Hipertrofia , Relações Interpessoais , Deficiências da Aprendizagem/epidemiologia , Masculino , Doenças do Sistema Nervoso/epidemiologia , Mancha Vinho do Porto/epidemiologia , Viés de Seleção , Dermatopatias/psicologia , Estigma Social , Inquéritos e Questionários , Terminologia como Assunto
12.
Dermatol Online J ; 23(10)2017 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-29469796

RESUMO

In dermatology, a particularly common ethical dilemma can arise when the skin lesions of bystanders are inadvertently viewed in public settings. Dermatology is a unique field, where a person's organ of interest is readily visible to others. When lesions are suspicious for skin disease, unsolicited medical opinions may or may not be given depending on several factors. This study examined the actions and attitudes of dermatologists with different levels of experience through the use of case scenarios with various settings and skin lesions.


Assuntos
Atitude do Pessoal de Saúde , Dermatologia/ética , Revelação/ética , Dermatopatias , Ética Médica , Humanos , Internato e Residência , Corpo Clínico Hospitalar , Dermatopatias/diagnóstico , Neoplasias Cutâneas/diagnóstico , Inquéritos e Questionários
14.
J Cosmet Laser Ther ; 18(7): 364-366, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27183246

RESUMO

Steatocystoma multiplex is a well-recognized condition in which subjects develop dermal cysts generally inherited in an autosomal dominant fashion, though these can occur sporadically. This case report describes the successful treatment of a 51-year-old woman with steatocystomata limited to the face, who after two treatments with a fractionated ablative carbon dioxide laser remained free of cysts for three years. We conclude that this treatment should be considered as an efficient and effective treatment option for patients with steatocystoma multiplex.


Assuntos
Dióxido de Carbono/uso terapêutico , Face/cirurgia , Terapia a Laser/métodos , Esteatocistoma Múltiplo/cirurgia , Face/patologia , Feminino , Humanos , Pessoa de Meia-Idade , Satisfação do Paciente , Esteatocistoma Múltiplo/patologia , Resultado do Tratamento
15.
Dermatol Online J ; 21(1)2015 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-25612132

RESUMO

Tumor necrosis factor (TNF) inhibitors are powerful biologic medications that have been used successfully in the treatment of a variety of inflammatory conditions, including psoriasis. Although TNF inhibitors are generally well tolerated, their use increases the risk of infections such as tuberculosis (TB), and paradoxically, they have been associated with development of sarcoidosis. We report the case of a 54-year old man with plaque psoriasis who developed a positive TB test and pulmonary sarcoidosis after 12 months of adalimumab treatment. After stopping adalimumab, his psoriasis worsened and he was started on ustekinumab and narrowband UVB, with improvement in symptoms. We provide a review of the literature and discuss treatment challenges.


Assuntos
Anticorpos Monoclonais Humanizados/uso terapêutico , Tuberculose Latente/induzido quimicamente , Psoríase/tratamento farmacológico , Sarcoidose Pulmonar/induzido quimicamente , Fator de Necrose Tumoral alfa/antagonistas & inibidores , Adalimumab , Anticorpos Monoclonais Humanizados/efeitos adversos , Humanos , Masculino , Pessoa de Meia-Idade , Sarcoidose Pulmonar/imunologia , Teste Tuberculínico , Terapia Ultravioleta , Ustekinumab
16.
J Am Acad Dermatol ; 70(2): 312-7, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24332312

RESUMO

BACKGROUND: Patients from ethnoracial minority groups have lower incidence rates of melanoma compared with whites, but are more likely to have advanced melanomas at diagnosis and lower survival. Infrequent skin cancer screening and poor melanoma awareness may contribute to these disparities. OBJECTIVE: The purpose of this survey study was to evaluate skin cancer surveillance behaviors and awareness among patients attending a dermatology clinic at a public hospital in New York City. METHODS: Surveys were administered to 152 patients from April to June 2012. RESULTS: In all, 16% of patients previously had a total body skin examination for cancer, 11% were taught by a health care practitioner how to perform skin self-examinations, and 15% perform skin self-examinations. More whites had a total body skin examination compared with minorities (49% vs 5%). Only 33% of patients previously given a diagnosis of skin cancer performed skin self-examinations. Patients possessed a poor ability to recognize features suspicious for melanoma, with minorities (especially Hispanics) performing worse than whites. LIMITATIONS: Small sample size is a limitation. CONCLUSIONS: Few patients engage in skin cancer screening behaviors and their knowledge about melanoma is poor, with minorities demonstrating lower understanding than whites. Our findings emphasize the need for improved patient education about characteristics of melanoma, regardless of race.


Assuntos
Atitude Frente a Saúde/etnologia , Detecção Precoce de Câncer/estatística & dados numéricos , Disparidades nos Níveis de Saúde , Melanoma/diagnóstico , Grupos Raciais/estatística & dados numéricos , Neoplasias Cutâneas/diagnóstico , Adulto , Povo Asiático/estatística & dados numéricos , Detecção Precoce de Câncer/tendências , Feminino , Promoção da Saúde/organização & administração , Inquéritos Epidemiológicos , Hispânico ou Latino/estatística & dados numéricos , Hospitais Públicos , Humanos , Masculino , Melanoma/epidemiologia , Pessoa de Meia-Idade , Avaliação das Necessidades , Cidade de Nova Iorque , Prevalência , Neoplasias Cutâneas/epidemiologia , Análise de Sobrevida , População Urbana , População Branca/estatística & dados numéricos , Adulto Jovem
17.
J Drugs Dermatol ; 13(10): 1277-9, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25607566

RESUMO

Skin metastases from visceral malignancies have been well documented in the literature, and may be the presenting sign of an occult internal malignancy. Lung cancer in particular is a relatively common cause of skin metastases, which are considered a poor prognostic sign. Rarely, patients with lung cancer develop a second primary lung cancer that may require a novel chemotherapeutic regimen. The frequency of second primary malignancies presenting with metastatic skin lesions is not documented in the literature. We present a case of a 50-year-old man with a history of metastatic lung adenocarcinoma who was referred for evaluation of a nodule overlying his right mandible, which had been progressively enlarging for two weeks. Biopsy demonstrated metastatic squamous cell carcinoma. Subsequent CT-guided biopsy of a left retroperitoneal lymph node was conducted and notable for squamous cell carcinoma. Therefore, this patient's skin lesion was the presenting sign of a second primary visceral tumor, likely originating in the lung. We present this case to raise clinical awareness of the rare phenomenon that cutaneous metastasis may be the first sign of a visceral cancer, even in the setting of a previous distinct primary malignancy.


Assuntos
Adenocarcinoma/patologia , Carcinoma de Células Escamosas/patologia , Neoplasias Pulmonares/patologia , Neoplasias Cutâneas/patologia , Adenocarcinoma/diagnóstico , Adenocarcinoma de Pulmão , Biópsia , Carcinoma de Células Escamosas/diagnóstico , Carcinoma de Células Escamosas/secundário , Eritema/patologia , Humanos , Neoplasias Pulmonares/diagnóstico , Masculino , Pessoa de Meia-Idade , Neoplasias Cutâneas/diagnóstico , Neoplasias Cutâneas/secundário
18.
Development ; 139(5): 859-70, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22278922

RESUMO

Coupling of stem/progenitor cell proliferation and differentiation to organismal physiological demands ensures the proper growth and homeostasis of tissues. However, in vivo mechanisms underlying this control are poorly characterized. We investigated the role of ribosomal protein S6 kinase (S6K) at the intersection of nutrition and the establishment of a stem/progenitor cell population using the C. elegans germ line as a model. We find that rsks-1 (which encodes the worm homolog of mammalian p70S6K) is required germline-autonomously for proper establishment of the germline progenitor pool. In the germ line, rsks-1 promotes cell cycle progression and inhibits larval progenitor differentiation, promotes growth of adult tumors and requires a conserved TOR phosphorylation site. Loss of rsks-1 and ife-1 (eIF4E) together reduces the germline progenitor pool more severely than either single mutant and similarly to reducing the activity of let-363 (TOR) or daf-15 (RAPTOR). Moreover, rsks-1 acts in parallel with the glp-1 (Notch) and daf-2 (insulin-IGF receptor) pathways, and does not share the same genetic dependencies with its role in lifespan control. We show that overall dietary restriction and amino acid deprivation cause germline defects similar to a subset of rsks-1 mutant phenotypes. Consistent with a link between diet and germline proliferation via rsks-1, loss of rsks-1 renders the germ line largely insensitive to the effects of dietary restriction. Our studies establish the C. elegans germ line as an in vivo model to understand TOR-S6K signaling in proliferation and differentiation and suggest that this pathway is a key nutrient-responsive regulator of germline progenitors.


Assuntos
Proteínas de Caenorhabditis elegans/metabolismo , Caenorhabditis elegans/citologia , Ciclo Celular/fisiologia , Dieta , Células Germinativas/fisiologia , Proteínas Quinases S6 Ribossômicas 70-kDa/metabolismo , Células-Tronco/fisiologia , Proteínas Adaptadoras de Transdução de Sinal/genética , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Animais , Caenorhabditis elegans/fisiologia , Proteínas de Caenorhabditis elegans/genética , Proliferação de Células , Fatores de Iniciação em Eucariotos/genética , Fatores de Iniciação em Eucariotos/metabolismo , Células Germinativas/citologia , Humanos , Glicoproteínas de Membrana/genética , Glicoproteínas de Membrana/metabolismo , Neoplasias/patologia , Neoplasias/fisiopatologia , Fosfotransferases (Aceptor do Grupo Álcool)/genética , Fosfotransferases (Aceptor do Grupo Álcool)/metabolismo , Receptor de Insulina/genética , Receptor de Insulina/metabolismo , Receptores Notch , Proteínas Quinases S6 Ribossômicas 70-kDa/genética , Células-Tronco/citologia
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