Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 4 de 4
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Nat Commun ; 12(1): 4884, 2021 08 12.
Artigo em Inglês | MEDLINE | ID: mdl-34385460

RESUMO

Pathology is practiced by visual inspection of histochemically stained tissue slides. While the hematoxylin and eosin (H&E) stain is most commonly used, special stains can provide additional contrast to different tissue components. Here, we demonstrate the utility of supervised learning-based computational stain transformation from H&E to special stains (Masson's Trichrome, periodic acid-Schiff and Jones silver stain) using kidney needle core biopsy tissue sections. Based on the evaluation by three renal pathologists, followed by adjudication by a fourth pathologist, we show that the generation of virtual special stains from existing H&E images improves the diagnosis of several non-neoplastic kidney diseases, sampled from 58 unique subjects (P = 0.0095). A second study found that the quality of the computationally generated special stains was statistically equivalent to those which were histochemically stained. This stain-to-stain transformation framework can improve preliminary diagnoses when additional special stains are needed, also providing significant savings in time and cost.


Assuntos
Biópsia com Agulha de Grande Calibre/métodos , Aprendizado Profundo , Diagnóstico por Computador/métodos , Nefropatias/patologia , Rim/patologia , Coloração e Rotulagem/métodos , Algoritmos , Corantes/química , Corantes/classificação , Corantes/normas , Diagnóstico Diferencial , Humanos , Nefropatias/diagnóstico , Patologia Clínica/métodos , Patologia Clínica/normas , Padrões de Referência , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Coloração e Rotulagem/normas
2.
J Pediatr Hematol Oncol ; 42(8): 474-481, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-32282650

RESUMO

The Ewing sarcoma family of tumors (ESFT) are high-grade small round blue cell malignancies traditionally presenting in children and adolescents. The most common site of primary disease is bone, though extraskeletal primary sites are well-recognized. We present 6 cases of primary ESFT of the kidney and 1 case of the adrenal gland. Patients were 11 to 18 years of age at diagnosis. Metastases at diagnosis were present in most cases (n=6). All patients underwent surgery, and most received radiation (n=5). Five patients relapsed after initial remission. Comprehensive review of the primary renal ESFT literature was used to analyze various factors, including age, sex, disease metrics, metastases at diagnoses, and overall survival in a total of 362 cases. Notably, while the general ESFT population has reported rates of metastasis at diagnosis of 20% to 25%, this rate in the renal ESFT population was 53% with a rate of 59% in adolescent and young-adult patients (11 to 24 y). Nodal disease at diagnosis was present in 24% of renal ESFT cases compared with 3.2% in patients with primary skeletal ESFT. While this malignant process may share histologic and molecular features with its bone and soft tissue counterparts, primary renal ESFT presentations seem to be more aggressive and have worse outcomes.


Assuntos
Neoplasias Renais/patologia , Sarcoma de Ewing/patologia , Adolescente , Criança , Feminino , Humanos , Neoplasias Renais/genética , Neoplasias Renais/mortalidade , Neoplasias Renais/terapia , Masculino , Sarcoma de Ewing/genética , Sarcoma de Ewing/mortalidade , Sarcoma de Ewing/terapia
3.
Dermatol Clin ; 37(4): 545-554, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31466594

RESUMO

Cutaneous metastasis portends a poor prognosis. Therefore, a high clinical index of suspicion is necessary so that a clinician knows how to recognize the presentation of a cutaneous metastasis, while the pathologist must know the appropriate stains to order. In this review, the authors summarize the common and uncommon ways that these tumors will present. Frequently a metastatic cancer will present as a firm red nodule or as a plaque, ulcer, or papule. Less commonly they will present with a clinical clue that can alert a clinician to a likely diagnosis; these manifestations include alopecic, vesicular, blue color, sclerodermoid, acrochordon-, or pellagra-like.


Assuntos
Neoplasias da Mama/patologia , Neoplasias Colorretais/patologia , Neoplasias Pulmonares/patologia , Neoplasias da Próstata/patologia , Neoplasias Cutâneas/secundário , Biópsia , Neoplasias da Mama/metabolismo , Neoplasias Colorretais/metabolismo , Feminino , Humanos , Imuno-Histoquímica , Neoplasias Pulmonares/metabolismo , Masculino , Neoplasias da Próstata/metabolismo , Neoplasias Cutâneas/metabolismo
4.
Ophthalmic Plast Reconstr Surg ; 35(1): 17-21, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-29879083

RESUMO

PURPOSE: To test the hypothesis that the orbit expands in the cranial vault after wide dural exposure after minimally invasive extradural transorbital decompression for thyroid eye disease. METHODS: A cross-sectional cohort study of 36 patients (60 orbits). Preoperative and postoperative (6 months) orbital CT following extradural transorbital decompression was analyzed. Primary outcome measure was the percentage area of the cranial vault occupied by orbital and brain tissue in a predefined window before and after surgery. Secondary outcome measures were displacement of the anteriormost aspect of the temporal lobe, reduction in clinical proptosis, change in clinical activity score, and change in diplopia. RESULTS: The mean percentage of the selected area of the cranial vault preoperatively was 0% orbital and 44% ± 15% brain tissue, compared with 70% ± 16% orbital and 28% ± 14% brain tissue postoperatively (p < 0.001). Posterior movement of the brain was demonstrated in 59 of 60 orbits, with a mean displacement of 2.0 mm ± 1.3 mm (p < 0.001). Mean proptosis reduction was 11.2 mm ± 3.6 mm (p < 0.001). The proportion of patients with clinical activity score <3 compared with clinical activity score ≥3 was not significantly different after surgery (p = 0.163). Improved diplopia was noted in 5 patients (14%), and worsening diplopia was noted in 3 patients (8%), although these changes were not significant (p = 0.772). Intraoperative dural tear with cerebrospinal fluid leak was reported in 2 orbits (3%), which was successfully managed with fibrin glue, with no sequelae. No other complications were noted, including infection, spontaneous orbital pulsations, postoperative hemorrhage (intracranial or intraorbital), or reactivation of disease. CONCLUSION: With wide exposure of the middle cranial fossa dura following extradural transorbital decompression, orbital tissue typically expands in the cranial vault.


Assuntos
Descompressão Cirúrgica/efeitos adversos , Diplopia/etiologia , Exoftalmia/etiologia , Oftalmopatia de Graves/cirurgia , Procedimentos Cirúrgicos Minimamente Invasivos/efeitos adversos , Órbita/cirurgia , Complicações Pós-Operatórias/etiologia , Adulto , Idoso , Estudos Transversais , Descompressão Cirúrgica/métodos , Diplopia/diagnóstico , Exoftalmia/diagnóstico , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/diagnóstico , Estudos Retrospectivos , Tomografia Computadorizada por Raios X , Acuidade Visual , Adulto Jovem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...