RESUMO
A type of cholangiocarcinoma (CCA) characterized by peculiar histologic patterns and underlying adenofibromatous lesions has been reported in the literature mostly as individual case reports. This study aims to further clarify the defining characteristics of this spectrum of lesions. Clinicopathologic analysis of 8 biliary tumors with tubulocystic architecture arising in the background of adenofibroma-type lesions was performed. Three of these were also investigated with next-generation sequencing with a 174 genes panel. The patients were 5 males and 3 females, with a mean age of 64.6. All tumors were intrahepatic except for one perihilar that protruded into soft tissues. The mean size was 4.4 cm. At histology, all cases showed a peculiar and cytologically bland tubulocystic pattern that closely resembled tubulocystic-type kidney cancers, including back-to-back microcystic units that formed relatively demarcated nodules, and occurring in the background of adenofibromatous lesions. One case showed perineural invasion by otherwise deceptively benign-appearing microcystic structures, one had areas transitioning to intraductal tubulopapillary neoplasm, and 3 cases harbored more conventional small-duct CCA foci. In those 3 cases, both the tubulocystic and conventional CCA components were investigated by next-generation sequencing separately, and they shared the molecular alterations, including recurrent mutations in chromatin remodeling genes, such as ARID1A , BAP1 , and PBRM1 , and the actionable FGFR2-MCU fusion gene. In the limited follow-up, all but one were alive and free of disease after surgical resection. In conclusion, we described a distinct entity of CCA with specific histo-molecular features, for which we propose the designation of tubulocystic carcinoma of bile ducts.
Assuntos
Adenofibroma , Neoplasias dos Ductos Biliares , Biomarcadores Tumorais , Colangiocarcinoma , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Masculino , Neoplasias dos Ductos Biliares/genética , Neoplasias dos Ductos Biliares/patologia , Neoplasias dos Ductos Biliares/cirurgia , Feminino , Pessoa de Meia-Idade , Colangiocarcinoma/genética , Colangiocarcinoma/patologia , Colangiocarcinoma/cirurgia , Idoso , Adenofibroma/patologia , Adenofibroma/genética , Adenofibroma/cirurgia , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/análise , Mutação , Ductos Biliares Intra-Hepáticos/patologia , Ductos Biliares Intra-Hepáticos/cirurgia , FenótipoRESUMO
OBJECTIVE: To explore the value of magnetic resonance imaging (MRI) and clinical features in identifying ovarian thecoma-fibroma (OTF) with cystic degeneration and ovary adenofibroma (OAF). METHODS: A total of 40 patients with OTF (OTF group) and 28 patients with OAF (OAF group) were included in this retrospective study. Univariable and multivariable analyses were performed on clinical features and MRI between the two groups, and the receiver operating characteristic (ROC) curve was plotted to estimate the optimal threshold and predictive performance. RESULTS: The OTF group had smaller cyst degeneration degree (P < .001), fewer black sponge sign (20% vs. 53.6%, P = .004), lower minimum apparent diffusion coefficient value (ADCmin) (0.986 (0.152) vs. 1.255 (0.370), P < .001), higher age (57.4 ± 14.2 vs. 44.1 ± 15.9, P = .001) and more postmenopausal women (72.5% vs. 28.6%, P < .001) than OAF. The area under the curve of MRI, clinical features and MRI combined with clinical features was 0.870, 0.841, and 0.954, respectively, and MRI combined with clinical features was significantly higher than the other two (P < .05). CONCLUSION: The cyst degeneration degree, black sponge sign, ADCmin, age and menopause were independent factors in identifying OTF with cystic degeneration and OAF. The combination of MRI and clinical features has a good effect on the identification of the two. ADVANCES IN KNOWLEDGE: This is the first time to distinguish OTF with cystic degeneration from OAF by combining MRI and clinical features. It shows the diagnostic performance of MRI, clinical features, and combination of the two. This will facilitate the discriminability and awareness of these two diseases among radiologists and gynaecologists.
Assuntos
Adenofibroma , Imageamento por Ressonância Magnética , Neoplasias Ovarianas , Tumor da Célula Tecal , Humanos , Feminino , Pessoa de Meia-Idade , Estudos Retrospectivos , Diagnóstico Diferencial , Neoplasias Ovarianas/diagnóstico por imagem , Neoplasias Ovarianas/patologia , Imageamento por Ressonância Magnética/métodos , Tumor da Célula Tecal/diagnóstico por imagem , Tumor da Célula Tecal/patologia , Adulto , Adenofibroma/diagnóstico por imagem , Adenofibroma/patologia , Fibroma/diagnóstico por imagem , Idoso , Cistos Ovarianos/diagnóstico por imagemAssuntos
Adenofibroma , Carcinoma Endometrioide , Neoplasias Ovarianas , Feminino , Humanos , Carcinoma Endometrioide/patologia , Tubas Uterinas/patologia , Cateninas/metabolismo , Carcinoma Epitelial do Ovário/patologia , Neoplasias Ovarianas/patologia , Adenofibroma/patologia , Células-Tronco/metabolismo , Células-Tronco/patologia , Fator de Transcrição PAX8/genética , Fator de Transcrição PAX8/metabolismo , Fator de Transcrição CDX2/metabolismo , Fator 1 de Ligação ao Facilitador Linfoide/metabolismoRESUMO
INTRODUCTION: Adenofibroma is a rare benign Müllerian mixed tumor composed of epithelial and mesenchymal cells. This tumor may occasionally be associated with toremifene therapy which is used as an adjuvant drug for breast cancer. CASE PRESENTATION: We describe a case of a 55-year-old woman with adenofibroma of the endometrium. This patient was receiving toremifene after surgery and neoadjuvant chemotherapy for breast cancer. She underwent a total abdominal hysterectomy and bilateral salpingectomy. There was no evidence of tumor residual or recurrence at 32 months of MRI follow-up. CONCLUSION: In conclusion, we report a rare case of endometrial adenofibroma in a patient receiving toremifene. It must be borne in mind that long-term toremifene therapy may increase the frequency of endometrial neoplasms.
Assuntos
Adenofibroma , Neoplasias da Mama , Neoplasias do Endométrio , Feminino , Humanos , Pessoa de Meia-Idade , Toremifeno/uso terapêutico , Neoplasias da Mama/patologia , Neoplasias do Endométrio/diagnóstico por imagem , Neoplasias do Endométrio/cirurgia , Neoplasias do Endométrio/tratamento farmacológico , Adenofibroma/tratamento farmacológico , Adenofibroma/patologia , Adenofibroma/cirurgiaAssuntos
Adenofibroma , Neoplasias dos Ductos Biliares , Colangiocarcinoma , Hepatopatias , Humanos , Colangiocarcinoma/diagnóstico , Colangiocarcinoma/cirurgia , Colangiocarcinoma/patologia , Ductos Biliares Intra-Hepáticos/patologia , Hepatopatias/patologia , Neoplasias dos Ductos Biliares/diagnóstico , Neoplasias dos Ductos Biliares/cirurgia , Neoplasias dos Ductos Biliares/patologia , Adenofibroma/diagnóstico , Adenofibroma/cirurgia , Adenofibroma/patologiaRESUMO
RATIONALE: Endometrioid adenofibroma is a benign epithelial neoplasm of the ovary, most of which are often unilateral. The symptoms of endometrioid adenofibroma are often nonspecific and misleading. Therefore, a full understanding of the characteristics, diagnosis, and treatment methods of this disease is of great importance. In this study, we report a 34-year-old woman who was found with an unidentified mass on the right ovary during the physical examination 3 years ago with nosymptoms or signs. PATIENT CONCERNS: A 34-year-old Chinese female was found with an unidentified 6 cm mass on the right ovary for 3 years that presented with no symptoms or signs. DIAGNOSIS: Pelvic ultrasound revealed a 6 cm cystic solid mixed mass on the right ovary. Through histological and immunohistochemical examinations, the tumor mass was finally diagnosed as endometrioid adenofibroma of ovary. INTERVENTIONS: To confirm the diagnosis, the ovarian tumor was laparoscopically resected. OUTCOMES: The patient returned to hospital after 3 months with no recurrence or postoperative complications. LESSONS: Endometrioid adenofibroma is a benign epithelial neoplasm of the ovary. Complete surgical resection is required and rare cases can recur. Postsurgical pathologic and immunohistochemical testing can confirm a diagnosis of endometrioid adenofibroma. It is important to understand of the key points of differential diagnosis of the disease due to the different prognosis and clinical treatment.
Assuntos
Adenofibroma , Neoplasias Epiteliais e Glandulares , Neoplasias Ovarianas , Feminino , Humanos , Adulto , Neoplasias Ovarianas/patologia , Neoplasias Epiteliais e Glandulares/diagnóstico , Diagnóstico Diferencial , Adenofibroma/diagnóstico , Adenofibroma/patologia , Adenofibroma/cirurgiaAssuntos
Adenocarcinoma , Adenofibroma , Neoplasias da Vesícula Biliar , Neoplasias Gastrointestinais , Hepatopatias , Neoplasias Ovarianas , Humanos , Feminino , Vesícula Biliar/diagnóstico por imagem , Vesícula Biliar/cirurgia , Vesícula Biliar/patologia , Adenocarcinoma/diagnóstico , Adenocarcinoma/cirurgia , Adenocarcinoma/patologia , Neoplasias Ovarianas/patologia , Adenofibroma/patologia , Neoplasias da Vesícula Biliar/diagnóstico , Neoplasias da Vesícula Biliar/cirurgia , Neoplasias da Vesícula Biliar/patologiaRESUMO
BACKGROUND: Biliary adenofibroma (BAF) is a rare primary hepatic tumor with the potential risk of malignant transformation. Given the extreme rarity of the disease, the imaging features of BAF are unclear. We presented a case of malignant BAF and conducted a systematic literature review. We highlighted the key imaging features in the diagnosis and aggressiveness assessment of BAF, as well as the role of various imaging modalities in evaluating BAF. CASE PRESENTATION: We reported a 64-year-old woman with a 5-months history of pain in the right upper quadrant abdomen. US of the liver showed a hypoechoic subcapsular nodule. CT scan revealed a subcapsular solid-cystic mass in segment V of the liver. The mass showed a marked enhancement in the arterial phase followed by wash-out in the venous phase. The patient underwent partial resection of liver's right lobe. The mass was diagnosed as BAF with malignant transformation by postoperative pathology. CONCLUSIONS: CT and MRI are helpful in recognizing and characterizing BAF. The imaging features of BAF include a solitary, large solid-cystic mass with a well-defined margin, lobulated shape, and internal septa; subcapsular location; no intrahepatic bile duct communication; the presence of von Meyenberg complexes in background liver. The enhancement patterns may have the potential to assess the aggressiveness of BAF, and that marked enhancement in the arterial phase followed by wash-out in the venous phase is suggestive of malignant BAF.
Assuntos
Adenofibroma , Neoplasias Gastrointestinais , Neoplasias Hepáticas , Abdome , Adenofibroma/diagnóstico por imagem , Adenofibroma/patologia , Adenofibroma/cirurgia , Feminino , Humanos , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/cirurgia , Pessoa de Meia-Idade , Tomografia Computadorizada por Raios XRESUMO
Ovarian seromucinous borderline tumors (SMBT) and clear cell tumors are both closely associated with endometriosis and share, in a proportion of cases, a molecular pathway involving ARID1A mutations, but they have been rarely described in association. We report a case series of 4 clear cell tumors (3 carcinomas, 1 borderline adenofibroma) coexisting in the same ovary with SMBT. In all cases, the SMBT was the predominant component and we highlight that adequate sampling of these tumors is important to detect small clear cell carcinomas, thus potentially altering the treatment and prognosis.
Assuntos
Adenocarcinoma Mucinoso/diagnóstico , Adenofibroma/diagnóstico , Carcinoma Epitelial do Ovário/diagnóstico , Proteínas de Ligação a DNA/metabolismo , Endometriose/diagnóstico , Neoplasias Ovarianas/diagnóstico , Fatores de Transcrição/metabolismo , Adenocarcinoma Mucinoso/complicações , Adenocarcinoma Mucinoso/patologia , Adenofibroma/complicações , Adenofibroma/patologia , Adulto , Idoso , Carcinoma Epitelial do Ovário/complicações , Carcinoma Epitelial do Ovário/patologia , Proteínas de Ligação a DNA/genética , Endometriose/complicações , Endometriose/patologia , Feminino , Humanos , Pessoa de Meia-Idade , Mutação , Neoplasias Ovarianas/complicações , Neoplasias Ovarianas/patologia , Ovário/patologia , Fatores de Transcrição/genéticaRESUMO
Dermatofibromas (DF) are common skin lesions composed of a dermal proliferation of fibroblasts and histiocytes. Among the variants of DFs, adenodermatofibroma are characterized by a dense proliferation of fibroblasts and histiocytes admixed with entrapped dilated glandular structures. We report two additional cases of adenodermatofibromas, review the literature, theorize on the histopathogenesis of this variant, and suggest that there are different patterns among adenodermatofibromas, from primarily cystic to primarily glandular.
Assuntos
Adenofibroma , Proliferação de Células , Fibroblastos , Histiócitos , Neoplasias Cutâneas , Adenofibroma/metabolismo , Adenofibroma/patologia , Adulto , Idoso , Fibroblastos/metabolismo , Fibroblastos/patologia , Histiócitos/metabolismo , Histiócitos/patologia , Humanos , Masculino , Neoplasias Cutâneas/metabolismo , Neoplasias Cutâneas/patologiaRESUMO
Pulmonary adenofibroma is a rare biphasic tumor that contains epithelial and stromal components. We report a case of pulmonary adenofibroma in which the tumor was resected by thoracoscopic surgery and the diagnosis was established by histopathology. A 59-year-old woman with a past medical history of pyelonephritis visited our hospital for evaluation of an abnormal opacity on a plain chest x-ray during a comprehensive medical examination. A follow-up chest x-ray showed enlargement of the lesion, and the patient was referred to our department for further management. Chest computed tomography revealed a well-circumscribed nodule measuring 1.4 cm in diameter in the upper lobe of the left lung. The chest imaging findings suggested a benign tumor, but because of evidence of lesion enlargement and elevated serum carcinoembryonic antigen levels, we performed wide wedge resection of the left upper lobe by video-assisted thoracoscopic surgery, for diagnosis and treatment. The resected specimen was submitted for rapid pathological diagnosis during the operation, and a benign tumor, possibly sclerosing pneumocytoma, was suspected. Therefore, we completed the operation with wide wedge resection. The final histopathological diagnosis was pulmonary adenofibroma. The patient had an uneventful postoperative course, and at this writing, 6 months postoperatively, there has been no evidence of tumor recurrence. We have reported this case of pulmonary adenofibroma because the tumor is rare, has not yet been well-characterized, and has an unclear prognosis. Collection of data from a larger number of patients is necessary.
Assuntos
Adenofibroma/cirurgia , Neoplasias Pulmonares/cirurgia , Cirurgia Torácica Vídeoassistida/métodos , Adenofibroma/diagnóstico por imagem , Adenofibroma/patologia , Feminino , Humanos , Neoplasias Pulmonares/diagnóstico por imagem , Neoplasias Pulmonares/patologia , Pessoa de Meia-Idade , Recidiva Local de Neoplasia , Hemangioma Esclerosante Pulmonar , Resultado do TratamentoRESUMO
AIMS: To report a series of benign ovarian seromucinous neoplasms, an uncommon and hitherto poorly described category of tumours included in the current 2014 World Health Organisation classification of tumours of the female reproductive organs. METHODS AND RESULTS: We report the clinicopathological features of a series of 22 benign ovarian seromucinous neoplasms (cystadenomas and adenofibromas or admixtures). The neoplasms occurred in patients aged 32-83 years (mean = 62, median = 65.5) and involved the left ovary (n = 14), the right ovary (n = 6) or both ovaries (n = 2). There was a common association with endometrioid elements (endometrioid differentiation within the cystadenoma/adenofibroma and/or endometriosis) and other endometriosis-associated neoplasms. CONCLUSIONS: We speculate that some of these represent benign ovarian endometrioid neoplasms with foci of mucinous and/or serous differentiation, while others represent true mixed neoplasms.
Assuntos
Adenofibroma/patologia , Cistadenoma/patologia , Neoplasias Ovarianas/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Endometriose/patologia , Feminino , Humanos , Pessoa de Meia-Idade , Neoplasias/patologia , Ovário/patologiaRESUMO
Serous adenofibroma of the fallopian tube is a rare, benign tumour of the female genital tract. They are usually small, asymptomatic and incidentally diagnosed during a surgery for another gynaecological condition. This report presents an atypical case of a 17-year-old girl with a tubal serous adenofibroma that presented with a palpable mass occupying the entire abdomen accompanied by urinary symptoms. She underwent a laparoscopic surgery with drainage of 1800 mL of yellow, citrine liquid from the cyst and left salpingectomy with no complications.
Assuntos
Adenofibroma , Neoplasias das Tubas Uterinas , Paracentese/métodos , Salpingectomia/métodos , Adenofibroma/patologia , Adenofibroma/fisiopatologia , Adenofibroma/cirurgia , Adolescente , Diagnóstico Diferencial , Neoplasias das Tubas Uterinas/patologia , Neoplasias das Tubas Uterinas/fisiopatologia , Neoplasias das Tubas Uterinas/cirurgia , Tubas Uterinas/patologia , Tubas Uterinas/cirurgia , Feminino , Humanos , Imageamento por Ressonância Magnética/métodos , Cuidados Pré-Operatórios/métodos , Resultado do Tratamento , Carga Tumoral , Ultrassonografia/métodosRESUMO
As one of the most common target organs for hematogenous spread from diverse cancers, biopsy interpretation of lung tumors is complicated by the challenging question of primary versus metastatic and by frequent entrapment of native respiratory glands. Nevertheless, the literature dealing with this issue is surprisingly sparse and no single study has been devoted to this topic. We reviewed 47 surgical lung specimens of non-epithelial neoplasms (38 metastases, mainly from sarcomas and 9 primary lesions) for frequency and pattern of intralesional epithelial entrapment. Respiratory epithelium entrapment was noted in 23/47 (49%) cases (diffuse in 15 and peripheral in 8). Entrapped glands frequently showed prominent regenerative and reactive changes mimicking neoplastic glands. Based on cellularity of the mesenchymal component and the extent, distribution and shape of entrapped respiratory glands, four morphological patterns were recognized: paucicellular sclerosing low-grade neoplasms containing leaflet-like glands indistinguishable from adenofibroma and fibroepithelial hamartomas (n = 11), and biphasic cellular lesions mimicking adenomyoepithelioma (n = 1), biphasic synovial sarcoma (n = 2), and pleuropulmonary blastoma (n = 1). Only a single genuine pulmonary adenofibroma was identified. This study highlights frequent respiratory epithelium entrapment in diverse non-epithelial lung tumors, both primary and metastatic. Recognition of this finding and use of adjunct IHC combined with clinical history should help to avoid misinterpretation as primary pulmonary biphasic neoplasm or as harmless adenofibroma. The vast majority of morphologically defined lung adenofibromas represent adenofibroma-like variants of histogenetically diverse entities so that a diagnosis of adenofibroma should be rendered only very restrictively and then as a diagnosis by exclusion.
Assuntos
Adenofibroma/patologia , Diagnóstico Diferencial , Neoplasias Pulmonares/patologia , Mucosa Respiratória/patologia , Adenofibroma/diagnóstico , Adolescente , Adulto , Idoso , Biomarcadores Tumorais/análise , Feminino , Humanos , Neoplasias Pulmonares/diagnóstico , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Adulto JovemRESUMO
Thirteen cases of primary pulmonary adenofibromas are presented. The patients are 8 women and 5 men between the ages of 41 and 73 years (average: 57 y). The patients presented with nonspecific symptomatology or their tumor was identified during routine chest films. A wedge resection was performed in all cases with lymph node sampling. Grossly, the tumors varied in size from 1 to 2.5 cm in greatest dimension. The entire tumor was histologically evaluated in all cases. All the tumors shared similar histologic features namely leaf-like/phyllodes-like growth patterns with varying areas of sclerosis, focal inflammation, and entrapped epithelium. A wide panel of immunohistochemical studies was performed including epithelial, neural, muscle, and vascular markers, all of which showed negative staining. The tumors were positive only for vimentin in the stroma and keratin in the entrapped epithelium. Further evaluation in 6 cases using in situ hybridization for the solitary fibrous tumor was performed and was negative. Clinical follow-up in all the patients showed no evidence of recurrence or metastatic disease, during a period of 12 to 36 months. The current cases highlight the unusual occurrence of pulmonary adenofibromas and the importance of separating these tumors from other tumors that may have the potential to recur or metastasize. The use of proper immunohistochemical stains/molecular analysis aids in the proper classification of these tumors.
Assuntos
Adenofibroma/diagnóstico , Adenofibroma/patologia , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/patologia , Adenofibroma/metabolismo , Adenofibroma/cirurgia , Adulto , Idoso , Biomarcadores Tumorais/metabolismo , Feminino , Seguimentos , Humanos , Imuno-Histoquímica , Neoplasias Pulmonares/metabolismo , Neoplasias Pulmonares/cirurgia , Masculino , Pessoa de Meia-Idade , Pneumonectomia , PrognósticoRESUMO
Biliary adenofibroma is a rare tumor with a bile duct origin characterized by a complex tubulocystic non-mucin secreting biliary epithelium with abundant fibrous stroma. The MRI features of biliary adenofibroma are not well established. The authors encountered two patients with biliary adenofibroma and reviewed the literature focusing on the MRI findings. A well-circumscribed multicystic tumor with septal enhancement and no intrahepatic bile duct communication may be the characteristic MRI findings of biliary adenofibroma.
Assuntos
Adenofibroma/diagnóstico , Neoplasias dos Ductos Biliares/diagnóstico , Imageamento por Ressonância Magnética , Adenofibroma/complicações , Adenofibroma/diagnóstico por imagem , Adenofibroma/patologia , Adulto , Neoplasias dos Ductos Biliares/complicações , Neoplasias dos Ductos Biliares/diagnóstico por imagem , Neoplasias dos Ductos Biliares/patologia , Hepatite B Crônica/complicações , Hepatite B Crônica/diagnóstico , Humanos , Masculino , Pessoa de Meia-Idade , Tomografia Computadorizada por Raios XRESUMO
Mucinous neoplasms of the ovary account for 10%-15% of ovarian neoplasms. They may be benign, borderline, or malignant. The large majority are benign or borderline, accounting for 80% and 16%-17%, respectively. Mucinous neoplasms of the ovary most commonly affect women in their 20s to 40s. The clinical manifestation is nonspecific, but most mucinous ovarian neoplasms manifest as large unilateral pelvic masses. At gross pathologic analysis, mucinous ovarian neoplasms appear as large multiloculated cystic masses. The contents of the cyst loculi vary on the basis of differences in internal mucin content. At histologic analysis, mucinous ovarian neoplasms are composed of multiple cysts lined by mucinous epithelium, often resembling gastrointestinal-type epithelium. Imaging evaluation most commonly includes US and/or MRI. The imaging findings parallel the gross pathologic features and include a large, unilateral, multiloculated cystic mass. The cyst loculi vary in echogenicity, attenuation, and signal intensity depending on the mucin content. Mucinous neoplasms of the ovary are staged surgically using the FIGO (International Federation of Gynecology and Obstetrics) staging system. Primary treatment is surgical, with adjuvant chemotherapy considered in the uncommon case of mucinous carcinoma with extraovarian disease. Since most mucinous ovarian neoplasms are benign or borderline, the overall prognosis is excellent.
Assuntos
Adenocarcinoma Mucinoso/diagnóstico por imagem , Cistadenoma Mucinoso/diagnóstico por imagem , Neoplasias Ovarianas/diagnóstico por imagem , Tomografia Computadorizada por Raios X/métodos , Ultrassonografia/métodos , Adenocarcinoma Mucinoso/epidemiologia , Adenocarcinoma Mucinoso/patologia , Adenofibroma/diagnóstico por imagem , Adenofibroma/patologia , Adulto , Idoso , Neoplasias do Apêndice/diagnóstico por imagem , Tumor de Brenner/diagnóstico por imagem , Tumor de Brenner/patologia , Cistadenoma Mucinoso/epidemiologia , Cistadenoma Mucinoso/patologia , Diagnóstico Diferencial , Epitélio/patologia , Feminino , Humanos , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Cistos Ovarianos/diagnóstico por imagem , Cistos Ovarianos/patologia , Neoplasias Ovarianas/epidemiologia , Neoplasias Ovarianas/patologia , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Carga Tumoral , Adulto JovemRESUMO
Semaphorins are a large family of evolutionarily conserved morphogenetic molecules that are associated with repelling axonal guidance. Intriguingly, recent researches indicate that semaphorins are involved in cancer progression. Semaphorin 4C (SEMA4C) has long been considered a neuronal migration gene, but we detected that it is also highly expressed in many malignant human cancers. During an investigation of subcutaneous tumor models, we found that SEMA4C expression promoted tumor growth and progression. We discovered that SEMA4C was involved in maintaining tumor cell self-renewal, likely by regulating the p53 pathway. Inhibiting the expression of endogenous SEMA4C in tumor cells impaired growth and induced senescence and cell-cycle arrest in the G2-phase. In addition, we found that SEMA4C induced the production of angiogenin and colony-stimulating factor-1 (CSF-1) in tumor cells by activating the NF-κB pathway in a plexinB2-dependent manner. In conclusion, SEMA4C expression in breast cancer cells promotes cancer cell proliferation, macrophage recruitment, and angiogenesis. Thus, inhibition of SEMA4C activity may be a novel therapeutic strategy for human breast cancer. IMPLICATIONS: In breast cancer, therapeutic targeting of the SEMA4C pathway may prevent tumor growth, angiogenesis, metastasis, and progression.
Assuntos
Neoplasias da Mama/irrigação sanguínea , Neoplasias da Mama/metabolismo , Macrófagos/metabolismo , Macrófagos/patologia , Semaforinas/metabolismo , Células A549 , Adenofibroma/irrigação sanguínea , Adenofibroma/genética , Adenofibroma/metabolismo , Adenofibroma/patologia , Animais , Neoplasias da Mama/genética , Neoplasias da Mama/patologia , Linhagem Celular Tumoral , Feminino , Células HT29 , Células HeLa , Xenoenxertos , Células Endoteliais da Veia Umbilical Humana , Humanos , Células MCF-7 , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Pessoa de Meia-Idade , Neovascularização Patológica/metabolismo , Neovascularização Patológica/patologia , Proteínas do Tecido Nervoso/metabolismo , Semaforinas/biossíntese , Semaforinas/genética , Transdução de Sinais , Proteína Supressora de Tumor p53/metabolismoRESUMO
A solitary firm nodule was found in the lung of a sika deer (Cervus nippon yesoensis). Histologically, it was a biphasic lesion composed of epithelial and stromal cell elements and exhibited a leaf-like growth pattern. The epithelial cells were immunohistochemically positive for pancytokeratin, cytokeratin 7, napsin A, and thyroid transcription factor-1, and the stromal cells were positive for vimentin and partially positive for desmin and α-smooth muscle actin. These observations were consistent with pulmonary adenofibroma, which is an extremely rare lesion in humans. To the best of our knowledge, this is the first reported case of pulmonary adenofibroma in an animal.
Assuntos
Adenofibroma/veterinária , Cervos , Neoplasias Pulmonares/veterinária , Adenofibroma/patologia , Animais , Feminino , Técnicas Imunoenzimáticas/veterinária , Neoplasias Pulmonares/patologiaRESUMO
Pulmonary adenofibroma (PAF) is a rare neoplasm that may be related to solitary fibrous tumor (SFT). A subset of PAFs harbor the NAB2-STAT6 fusion that is typical of SFT, but a significant proportion do not. Their distinction is clinically important as SFTs can potentially have an aggressive clinical course, while there has been no report of a PAF behaving in a malignant fashion. We report a case of a 60-year-old male who developed a SFT and PAF in the same lung. The SFT harbored a NAB2-STAT6 fusion, while the PAF did not have any identifiable fusion. This case represents the first instance of a single patient with both of these tumors occurring simultaneously in the same lung.