RESUMEN
The mortality of coronavirus disease 2019 (COVID-19) is strongly correlated with pulmonary vascular pathology accompanied by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection-triggered immune dysregulation and aberrant activation of platelets. We combined histological analyses using field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy analyses of the lungs from autopsy samples and single-cell RNA sequencing of peripheral blood mononuclear cells to investigate the pathogenesis of vasculitis and immunothrombosis in COVID-19. We found that SARS-CoV-2 accumulated in the pulmonary vessels, causing exudative vasculitis accompanied by the emergence of thrombospondin-1-expressing noncanonical monocytes and the formation of myosin light chain 9 (Myl9)-containing microthrombi in the lung of COVID-19 patients with fatal disease. The amount of plasma Myl9 in COVID-19 was correlated with the clinical severity, and measuring plasma Myl9 together with other markers allowed us to predict the severity of the disease more accurately. This study provides detailed insight into the pathogenesis of vasculitis and immunothrombosis, which may lead to optimal medical treatment for COVID-19.
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COVID-19 , Pulmón , Cadenas Ligeras de Miosina , SARS-CoV-2 , Índice de Severidad de la Enfermedad , Tromboinflamación , Vasculitis , COVID-19/sangre , COVID-19/complicaciones , COVID-19/patología , Humanos , Leucocitos Mononucleares , Pulmón/irrigación sanguínea , Pulmón/metabolismo , Pulmón/patología , Pulmón/virología , Cadenas Ligeras de Miosina/sangre , RNA-Seq , SARS-CoV-2/aislamiento & purificación , Análisis de la Célula Individual , Espectrometría por Rayos X , Tromboinflamación/patología , Tromboinflamación/virología , Vasculitis/patología , Vasculitis/virologíaRESUMEN
Recent studies have shown that transmembrane-type tight junction proteins are upregulated in various cancers compared with their levels in normal tissues and are involved in cancer progression, suggesting that they are potential therapeutic targets. Here, we demonstrated the expression profile and a novel role of junctional adhesion molecule-A (JAM-A) in breast cancer. Immunohistochemistry of surgical specimens showed that JAM-A was highly expressed from carcinoma in situ lesions, as in other adenocarcinomas, with higher expression in invasive carcinomas. High expression of JAM-A contributed to malignant aspects such as lymph node metastasis and lymphatic involvement positivity. In breast cancer cells, JAM-A expression status affects malignant potentials including proliferation and migration. Multilayered proteomics revealed that JAM-A interacts with the amino acid transporter LAT1 in breast cancer cells. JAM-A regulates the expression of LAT1 and interacts with it on the whole cell membrane, leading to enhanced amino acid uptake to promote tumor growth. Double high expression of JAM-A and LAT1 predicts poor prognosis in patients with breast cancer. Of note, an antibody against an extracellular domain of JAM-A suppressed the proliferation of breast cancer cells. Our findings indicate the possibility of JAM-A-targeted therapy ideally combined with LAT1-targeted therapy as a new therapeutic strategy against breast cancer.
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Neoplasias de la Mama , Moléculas de Adhesión Celular , Progresión de la Enfermedad , Transportador de Aminoácidos Neutros Grandes 1 , Proteómica , Receptores de Superficie Celular , Humanos , Transportador de Aminoácidos Neutros Grandes 1/metabolismo , Transportador de Aminoácidos Neutros Grandes 1/genética , Femenino , Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/patología , Moléculas de Adhesión Celular/metabolismo , Moléculas de Adhesión Celular/genética , Receptores de Superficie Celular/metabolismo , Proteómica/métodos , Línea Celular Tumoral , Proliferación Celular , Movimiento Celular , Pronóstico , Animales , Regulación Neoplásica de la Expresión Génica , Persona de Mediana Edad , Metástasis Linfática , RatonesRESUMEN
Uterine tumor resembling ovarian sex cord tumor (UTROSCT) is a rare tumor with low malignant potential that commonly occurs in middle age. Although more than 100 cases have been reported to date, myxoid morphology is not well documented. Here, we present a 75-yr-old woman with abnormal vaginal bleeding, with an 8-cm mass in the uterine corpus detected by irregular, high-intensity signaling on T2-weighted imaging. The uterine mass had a glistening mucinous appearance on gross examination. Microscopically, most of the tumor cells were floating in the myxoid stroma. The tumor cells formed clusters or nests with abundant cytoplasm, while some exhibited trabecular or rhabdoid appearances. Immunohistochemically, tumor cells were positive for pancytokeratin (AE1/AE3), α-smooth muscle actin, CD10, progesterone receptor, and some sex cord markers such as calretinin, inhibin, CD56, steroidogenic factor-1. Electron microscopy demonstrated epithelial and sex cord differentiation. This tumor was negative for JAZF1-JJAZ1 fusion gene that is frequently found in low-grade endometrial stromal sarcoma. Fusion genes related to UTROSCT, including NCOA2/3 , were not detected by reverse transcription polymerase chain reaction. The present case suggests that UTROSCT should be included in the differential diagnosis of myxoid uterine tumors.
Asunto(s)
Neoplasias Endometriales , Tumores Estromáticos Endometriales , Neoplasias Ováricas , Tumores de los Cordones Sexuales y Estroma de las Gónadas , Neoplasias Uterinas , Persona de Mediana Edad , Femenino , Humanos , Neoplasias Uterinas/patología , Tumores Estromáticos Endometriales/patología , Tumores de los Cordones Sexuales y Estroma de las Gónadas/diagnóstico , Tumores de los Cordones Sexuales y Estroma de las Gónadas/genética , Tumores de los Cordones Sexuales y Estroma de las Gónadas/patología , Neoplasias Ováricas/diagnóstico , Neoplasias Ováricas/patología , Biomarcadores de TumorRESUMEN
BACKGROUND: Soft tissue sarcoma (STS) has various histological types and is rare, making it difficult to evaluate the malignancy of each histological type. Thus, comprehensive histological grading is most important in the pathological examination of STS. The Fédération Nationale des Centres de Lutte Contre le Cancer (FNCLCC) grading system is most commonly used in daily pathological analysis of STS. Among the FNCLCC grading system parameters, mitotic count is a key morphological parameter reflecting the proliferative activity of tumor cells, although its reproducibility may be lacking. Here, we compared the prognostic utility of the conventional and modified FNCLCC grading systems in JCOG1306. METHODS: We analyzed 140 patients with non-small round cell sarcoma. We performed Ki-67 immunostaining using open biopsy specimens before preoperative chemotherapy in all patients. We assessed histological grade in individual cases by conventional FNCLCC grading (tumor differentiation, mitotic count, and necrosis) and modified FNCLCC grading using the Ki-67 labeling index instead of mitotic count. We conducted univariable and multivariable Cox regression analyses to investigate the influence of grade on overall survival. RESULTS: In univariable analysis, prognosis was worse for patients with conventional FNCLCC Grade 3 tumors compared with Grade 1 or 2 tumors (hazard ratio [HR] 4.21, 95% confidence interval [CI] 1.47-12.05, P = 0.008). Moreover, prognosis was worse in patients with modified FNCLCC Grade 3 tumors compared with Grade 1 or 2 tumors (HR 4.90, 95% CI 1.64-14.65, P = 0.004). In multivariable analysis including both conventional and modified FNCLCC grading, the modified grading more strongly affected overall survival (HR 6.70, 95% CI 1.58-28.40, P = 0.010). CONCLUSIONS: The modified FNCLCC grading system was superior to the conventional system in predicting the prognosis of patients with non-small round cell sarcoma according to this supplementary analysis of data from the randomized controlled trial JCOG1306.
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Antígeno Ki-67 , Clasificación del Tumor , Humanos , Antígeno Ki-67/análisis , Antígeno Ki-67/metabolismo , Femenino , Masculino , Pronóstico , Persona de Mediana Edad , Anciano , Adulto , Sarcoma/patología , Sarcoma/mortalidad , Sarcoma/metabolismoRESUMEN
BACKGROUND: We investigated whether non-enhancement MRI features, including measurement of the heterogeneity of the tumor with MR T2 imaging by calculating coefficient of variation (CV) values, were associated with the prognosis of non-metastatic malignant peripheral nerve sheath tumors (MPNST). METHODS: This retrospective study included 42 patients with MPNST who had undergone surgical resection (mean age, 50 years ± 21; 20 male participants). Non-enhancement MR images were evaluated for signal intensity heterogeneity on T1- and T2-weighted imaging, tumor margin definition on T1- and T2-weighted imaging, peritumoral edema on T2-weight imaging, and CV. We measured the signal intensities of MR T2-weighted images and calculated the corresponding CV values. CV is defined as the ratio of the standard deviation to the mean. The associations between factors and overall survival (OS) were investigated via the Kaplan-Meier method with log-rank tests and the Cox proportional hazards model. RESULTS: The mean CV value of MR T2 images was 0.2299 ± 0.1339 (standard deviation) (range, 0.0381-0.8053). Applying receiver operating characteristics analysis, the optimal cut-off level for CV value was 0.137. This cut-off CV value was used for its stratification into high and low CV values. At multivariate survival analysis, a high CV value (hazard ratio = 3.63; 95% confidence interval = 1.16-16.0; p = 0.047) was identified as an independent predictor of OS. CONCLUSION: The CV value of the signal intensity of heterogenous MPNSTs MR T2-weighted images is an independent predictor of patients' OS.
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Neoplasias de la Vaina del Nervio , Neurofibrosarcoma , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Pronóstico , Imagen por Resonancia Magnética/métodos , Neoplasias de la Vaina del Nervio/diagnóstico por imagen , Neoplasias de la Vaina del Nervio/patologíaRESUMEN
Superficial CD34-positive fibroblastic tumor (SCPFT) is a fibroblastic/myofibroblastic soft tissue tumor of rarely metastasizing intermediate malignancy. Some recent studies have described a relationship between SCPFT and PRDM10-rearranged soft tissue tumor (PRT) based on SynCAM3 and PRDM10 expression on immunohistochemistry. We performed CD34, cytokeratin AE1/AE3, SynCAM3, and PRDM10 immunohistochemistry in SCPFT and its histological mimics, including myxoinflammatory fibroblastic sarcoma (MIFS), superficially localized myxofibrosarcoma (MFS), and undifferentiated pleomorphic sarcoma. We also examined cyclin D1 expression because it is expressed in MIFS and MFS. We conducted fluorescence in situ hybridization (FISH) of PRDM10 rearrangement in SCPFT cases. On immunohistochemistry, only SCPFT showed strong and diffuse SynCAM3 expression. SCPFT also exhibited strong nuclear and weak cytoplasmic cyclin D1 expression, which was similar to that observed in MIFS. Two of five SCPFT cases exhibited nuclear PRDM10 expression. FISH revealed PRDM10 split signals in 44% and 24% of tumor cells in two SCPFT cases showing nuclear PRDM10 expression on immunohistochemistry, respectively. A minority of non-SCPFT cases showed focal SynCAM3 expression, but a combination of SynCAM3 and cyclin D1 in addition to CD34 and cytokeratin AE1/AE3 may be useful for the differential diagnosis of SCPFT and its histological mimics.
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Fibrosarcoma , Neoplasias Cutáneas , Neoplasias de los Tejidos Blandos , Humanos , Inmunohistoquímica , Ciclina D1 , Hibridación Fluorescente in Situ , Neoplasias de los Tejidos Blandos/diagnóstico , Neoplasias de los Tejidos Blandos/patología , Fibrosarcoma/patología , Queratinas , Biomarcadores de TumorRESUMEN
Crystal-storing histiocytosis (CSH) is a rare disorder that shows infiltration of histiocytes with an aberrant cytoplasmic accumulation of crystalline structures and is often accompanied by lymphoproliferative-plasma cell disorders (LP-PCD) as background diseases. The diagnosis of CSH requires identification of crystalline structures that accumulate in the infiltrating histiocytes, which may be challenging by optical microscopy alone. In this case report, we describe an atypical course of systemic CSH with multifocal fibrosclerosis of an unknown background disease that was diagnosed by ultrastructural observation, including transmission electron microscopy (TEM) and scanning electron microscopy (SEM), in pathological autopsy. In addition, crystalline structures were successfully identified by scanning electron microscopic observations using formalin-fixed and paraffin-embedded (FFPE) tissue from biopsy specimens taken before death. Since CSH was identified by SEM in a tiny biopsy specimen, observation of histiocytic infiltrative lesions by SEM using FFPE tissue may lead to early detection of and initiation of treatment for CSH.
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Histiocitosis , Humanos , Microscopía Electrónica de Rastreo , Adhesión en Parafina , Histiocitos/metabolismo , Histiocitosis/diagnóstico , Histiocitosis/complicaciones , Histiocitosis/metabolismo , Formaldehído/metabolismoRESUMEN
Combined chemoradiotherapy (CRT) and programmed cell death-ligand 1 (PD-L1) blockade is a new care standard for unresectable stage III non-small-cell lung cancer (NSCLC). Although this consolidation therapy has improved the overall survival of patients with NSCLC, the synergistic action mechanisms of CRT and immunotherapy on T cells remain unclear. In addition, there is a paucity of reliable biomarkers to predict clinical responses to therapy. In this study, we analyzed T-cell receptor (TCR) sequences in the peripheral blood of five patients with NSCLC. T-cell receptor analysis was undertaken before treatment, after CRT, and after PD-L1 blockade. Notably, we observed the expansion and alteration of the dominant T-cell clonotypes in all cases with a complete response. In contrast, neither expansion nor alteration of the TCR repertoire was observed in cases with progressive disease. T cell expansion was initiated after CRT and was further enhanced after PD-L1 blockade. Our findings suggest the systemic effect of CRT on circulating T cells in addition to the curative effect on limited tumor sites. Dynamic changes in circulating T-cell clonotypes could have a prognostic significance for combined CRT and PD-L1 blockade.
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Carcinoma de Pulmón de Células no Pequeñas , Neoplasias Pulmonares , Humanos , Carcinoma de Pulmón de Células no Pequeñas/tratamiento farmacológico , Antígeno B7-H1 , Neoplasias Pulmonares/tratamiento farmacológico , Receptor de Muerte Celular Programada 1 , Ligandos , Quimioradioterapia , Receptores de Antígenos de Linfocitos T , ApoptosisRESUMEN
BACKGROUND: Preoperative chemotherapy is widely applied to high-grade localized soft tissue sarcomas (STSs); however, the prognostic significance of histological response to chemotherapy remains controversial. This study aimed to standardize evaluation method of histological response to chemotherapy with high agreement score among pathologists, and to establish a cut-off value closely related to prognosis. METHODS: Using data and specimens from the patients who had registered in the Japan Clinical Oncology Group study, JCOG0304, a phase II trial evaluating the efficacy of perioperative chemotherapy with doxorubicin (DOX) and ifosfamide (IFO), we evaluated histological response to preoperative chemotherapy at the central review board. RESULTS: A total of 64 patients were eligible for this study. The percentage of viable tumor area ranged from 0.1% to 97.0%, with median value of 35.7%. Regarding concordance proportion between pathologists, the weighted kappa coefficient (κ) score in all patients was 0.71, indicating that the established evaluation method achieved substantial agreement score. When the cut-off value of the percentage of the residual tumor area was set as 25%, the p-value for the difference in overall survival showed the minimum value. Hazard ratio of the non-responder with percentage of the residual tumor < 25%, to the responder was 4.029 (95% confidence interval 0.893-18.188, p = 0.070). CONCLUSION: The standardized evaluation method of pathological response to preoperative chemotherapy showed a substantial agreement in the weighted κ score. The evaluation method established here was useful for estimating of the prognosis in STS patients who were administered perioperative chemotherapy with DOX and IFO. TRIAL REGISTRATION: UMIN Clinical Trials Registry C000000096. Registered 30 August, 2005 (retrospectively registered).
Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Quimioterapia Adyuvante/estadística & datos numéricos , Monitoreo de Drogas/normas , Sarcoma/terapia , Neoplasias de los Tejidos Blandos/terapia , Adulto , Anciano , Doxorrubicina/administración & dosificación , Femenino , Humanos , Ifosfamida/administración & dosificación , Masculino , Persona de Mediana Edad , Clasificación del Tumor , Periodo Preoperatorio , Pronóstico , Estándares de Referencia , Valores de Referencia , Sarcoma/mortalidad , Sarcoma/patología , Neoplasias de los Tejidos Blandos/mortalidad , Neoplasias de los Tejidos Blandos/patología , Análisis de Supervivencia , Resultado del Tratamiento , Adulto JovenRESUMEN
BACKGROUND: Predicting the prognosis of patients with solitary fibrous tumor (SFT) is often difficult. The prognostic risk models developed by Demicco et al. are now the standard for evaluating the risk of SFT metastasis in the current World Health Organization classification of soft tissue and bone tumors. METHODS: In this study, we examined the prognostic usefulness of a modified version of the Demicco risk models that replaces the mitotic count with the Ki-67 labeling index. We compared the three-variable and four-variable Demicco risk models with our modified risk models using Kaplan-Meier curves based on data for 43 patients with SFT. RESULTS: We found a significant difference in metastasis-free survival when patients were classified into low-risk and intermediate/high-risk groups using the three-variable (P = 0.022) and four-variable (P = 0.046) Demicco models. There was also a significant difference in metastasis-free survival between the low-risk and intermediate/high-risk groups when the modified three-variable (P = 0.006) and four-variable (P = 0.022) models were used. CONCLUSION: Modified risk models that include the Ki-67 labeling index are effective for prediction of the prognosis in patients with SFT.
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Tumores Fibrosos Solitarios , Humanos , Antígeno Ki-67 , Pronóstico , Tumores Fibrosos Solitarios/cirugíaRESUMEN
PURPOSE: A circumferential resection margin (CRM) > 1 mm is a surrogate marker of oncologic outcomes in rectal cancer patients. In Japan, because the mesentery is removed from the rectum, the CRM cannot be measured. This multicenter prospective study evaluates the feasibility of a resected specimen processing method that allows CRM measurement. METHODS: Fifty patients with rectal cancer were enrolled. Resected specimens were processed as previously reported. The primary outcomes were CRM measurement and the rate of CRM positivity. The secondary outcomes were the quality of total mesorectal excision, the possibility to visualize and sample the tumor, the number of harvested lymph nodes, and comparison between the pathological CRM and preoperative mesorectal fascia (MRF) involvement. This study was registered in the University Hospital Medical Information Network (UMIN) Clinical Trials Registry under identification number UMIN000031735. RESULTS: The CRM was measurable in all patients and found to be positive in three (6%). We confirmed tumor localization, sampled the tumor, and measured the distal margin in all patients. A median of 20 lymph nodes were harvested. The concordance rate between preoperative MRF involvement and pathological CRM status was 90%. CONCLUSION: A semi-opened rectal specimen with transverse slicing is a feasible method for measuring the CRM.
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Neoplasias del Recto , Recto , Estudios de Factibilidad , Humanos , Márgenes de Escisión , Estudios Prospectivos , Neoplasias del Recto/patología , Neoplasias del Recto/cirugía , Recto/patología , Recto/cirugía , Resultado del TratamientoRESUMEN
Atypical spindle cell/pleomorphic lipomatous tumor (ASPLT) is a new entity of benign adipocytic tumor that spans a wide spectrum of histology from adipocytic to spindle cell/pleomorphic tumors. The latter non-adipocytic component rarely shows sarcomatous features although ASPLTs are not thought to dedifferentiate. A 78-year-old woman with ASPLT in the left thigh had a sarcomatous component with high mitotic activity and Ki-67 labeling index (LI) mimicking dedifferentiated liposarcoma. The adipocytic component consisted of various-sized adipocytic cells with few lipoblasts. The sarcomatous component consisted of a fascicular proliferation of atypical spindle cells with scattered large bizarre and multinucleated giant cells. Mitotic figures including atypical mitoses were frequently observed. Immunohistochemically, the tumor cells were positive for cluster of differentiation 34 but not mouse double minute 2 homolog (MDM2), cyclin-dependent kinase 4 (CDK4), or retinoblastoma (Rb) protein. Ki-67 LI in the sarcomatous component reached 40%. MDM2 and CDK4 genes were not amplified and 13q14 including the RB1 locus was deleted according to fluorescence in situ hybridization. The patient is alive with no evidence of local recurrence or distant metastasis 3.5 years after surgery. As ASPLT may exhibit morphological variation, it is important to rule out dedifferentiated liposarcoma with careful pathological examination.
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Lipoma , Liposarcoma , Femenino , Humanos , Anciano , Quinasa 4 Dependiente de la Ciclina/genética , Antígeno Ki-67/genética , Hibridación Fluorescente in Situ , Biomarcadores de Tumor/genética , Liposarcoma/diagnóstico , Liposarcoma/genética , Liposarcoma/patología , Lipoma/diagnóstico , Lipoma/genética , Lipoma/patologíaRESUMEN
Recent studies have shown that aberrant expression of tight junction proteins (TJP) contributes to malignant potential of various cancers. In the present study, we investigated the expression of junctional adhesion molecule-A (JAM-A), one of the transmembrane TJP, in uterine cervical adenocarcinoma and the significance of its expression for malignancy. Immunohistochemistry on human surgical specimens showed that JAM-A was aberrantly expressed in neoplastic regions including adenocarcinoma in situ (AIS). Knockout of JAM-A significantly suppressed cell proliferation and colony-forming and migration abilities. We also showed that an antibody specific to an extracellular region of JAM-A reduced cell proliferation ability and that loss of JAM-A increased drug sensitivity of cervical adenocarcinoma cells. Based on a comprehensive proteome analysis, we found that poliovirus receptor (PVR/CD155) was regulated by JAM-A and formed a physical interaction with JAM-A. In human surgical specimens, PVR/CD155 expression was significantly correlated with some clinicopathological features and prognosis of cervical adenocarcinoma. Interestingly, most of the PVR/CD155-positive cases expressed a high level of JAM-A, and patients with the expression pattern of PVR/CD155 positive/JAM-A high had significantly shorter periods of relapse-free survival (P = .00964) and overall survival (P = .0204) than those for the other patients. Our observations suggest that aberrant expression of JAM-A promotes malignancy of uterine cervical adenocarcinoma by regulation of PVR/CD155, and JAM-A is therefore a potential therapeutic target for this malignancy.
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Adenocarcinoma/patología , Moléculas de Adhesión Celular/metabolismo , Regulación Neoplásica de la Expresión Génica/fisiología , Receptores de Superficie Celular/metabolismo , Receptores Virales/metabolismo , Neoplasias del Cuello Uterino/patología , Adenocarcinoma/metabolismo , Adulto , Femenino , Humanos , Persona de Mediana Edad , Neoplasias del Cuello Uterino/metabolismoRESUMEN
Immune checkpoint inhibitors (ICIs) have provided an additional treatment option for various types of human cancers. However, ICIs often induce various immune-related adverse events (irAEs). Enterocolitis is a major irAE with poorly understood histopathological characteristics. In this study, we retrospectively investigated the histopathology of colon tissue samples from 17 patients treated with ICIs. There were two major histological patterns of colitis: an ulcerative colitis-like pattern and a graft vs host disease-like pattern. Although these two patterns of colitis were mutually exclusive, both patterns often showed a characteristic that we call "subepithelial surface granulomatosis" (SSG), which has not been reported in other types of colitis. SSG was found even in colon tissue without symptoms or endoscopic findings of colitis. Given the increasing reports of sarcoid reaction or exacerbation of tuberculosis after treatment with ICIs, granuloma formation could be a histological hallmark of systemic immune activation by ICIs. Although statistical significance was not obtained, probably because of the small sample size, SSG may be a surrogate biomarker of systemic anticancer immune activation. We propose that a prospective study with larger sample size be performed.
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Colitis/inmunología , Colon/patología , Inhibidores de Puntos de Control Inmunológico/efectos adversos , Mucosa Intestinal/patología , Neoplasias/tratamiento farmacológico , Anciano , Anciano de 80 o más Años , Biopsia , Colitis/inducido químicamente , Colitis/diagnóstico , Colitis/patología , Colon/inmunología , Femenino , Humanos , Mucosa Intestinal/inmunología , Masculino , Persona de Mediana Edad , Neoplasias/inmunología , Estudios RetrospectivosRESUMEN
A 60-year-old man had a malignant left lower lung tumour with no metastases and underwent video-assisted thoracoscopic left lower lobectomy and lymphadenectomy. Pathological examination led to a diagnosis of capicua transcriptional repressor (CIC)-rearranged sarcoma. He has had 3.5 years of recurrence-free survival. CIC-rearranged sarcoma is a Ewing-like sarcoma that shows pathological findings similar to Ewing sarcoma. Most of CIC-rearranged sarcoma is CIC-double homeobox 4 protein (DUX4) fusion. Pulmonary CIC-rearranged sarcoma is extremely rare and has an unfavourable prognosis. However, complete resection can produce prognosis of long-term survival, and thus, surgery is an important option.
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Reordenamiento Génico , Neoplasias Pulmonares/genética , Proteínas Represoras/genética , Sarcoma/genética , Humanos , Neoplasias Pulmonares/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Sarcoma/diagnóstico por imagen , Sarcoma/patologíaRESUMEN
BACKGROUND: The differential diagnosis of fibroma of tendon sheath (FTS) and giant cell tumor of tendon sheath (GCTTS) on the basis of clinical and radiographic characteristics remains difficult. PURPOSE: To evaluate the quantitative measurement of signal intensity (SI) obtained by magnetic resonance imaging (MRI) for the differential diagnosis of FTS and GCTTS in just the finger. MATERIAL AND METHODS: We retrospectively identified patients with FTS (n = 6) and GCTTS (n = 22) of the finger who were treated at our hospitals between April 2011 and August 2019. Two researchers independently reviewed the MRIs and measured the regions of interest (ROIs) in the tumor and flexor tendon from the same image. The SI ratio obtained for the tumor and tendon ROIs was measured and compared using receiver-operating characteristic curve analyses. Sensitivity and specificity analyses were performed. RESULTS: The SI ratios (mean ± SD) of FTS and GCTTS were 1.83 ± 0.64 and 6.34 ± 3.16 for researcher 1 and 1.82 ± 0.60 and 6.10 ± 3.22 for researcher 2, respectively. The areas under the curve were 0.970 and 0.970 for researchers 1 and 2, respectively. The cut-off values of the SI ratio as determined by researchers 1 and 2 for differentiating FTS from GCTTS were 3.00 and 3.00, respectively (sensitivity = 95.5%, specificity = 100%). CONCLUSIONS: The SI ratio is useful for differentiating FTS from GCTTS independent of a combination of tumor signal and shape.
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Fibroma/diagnóstico por imagen , Dedos/diagnóstico por imagen , Tumor de Células Gigantes de las Vainas Tendinosas/diagnóstico por imagen , Imagen por Resonancia Magnética/métodos , Tendones/diagnóstico por imagen , Adulto , Área Bajo la Curva , Diagnóstico Diferencial , Femenino , Humanos , Masculino , Persona de Mediana Edad , Curva ROC , Estudios Retrospectivos , Sensibilidad y EspecificidadRESUMEN
Mismatch repair protein deficiency (dMMR) is a favorable prognostic factor in colorectal cancer. It is also associated with aberrant expression of HLA class I molecules, which are required for cytotoxic T lymphocyte-mediated cancer immunotherapy. Because dMMR is frequently also found in endometrial cancers (ECs), we retrospectively investigated the expression of mismatch repair proteins and HLA class I molecules in 127 EC patients. In this study, EC patients being treated in our hospital were recruited from 2005 to 2009 and observed until December 2017. Lesion specimens were evaluated via immunohistochemistry for MSH6 and PMS2 (mismatch repair proteins) and HLA class I molecules. Expression of these molecules was statistically related to clinical and pathological factors and prognosis. dMMR was detected in 33 patients and did not correlate with the expression level of HLA class I molecules (P = 0.60). On the other hand, unexpectedly, multivariate analysis revealed that intact expression of HLA class I molecules was associated with p53 overexpression (P = 0.004). Neither dMMR nor decreased expression of HLA class I molecules were prognostic factors. These results are inconsistent with previous findings for colorectal cancer. A distinctive local tissue immune microenvironment would underlie the discrepancy in the results between EC and colorectal cancer.
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Biomarcadores de Tumor/deficiencia , Neoplasias Colorrectales/genética , Neoplasias Endometriales/genética , Regulación Neoplásica de la Expresión Génica/inmunología , Antígenos de Histocompatibilidad Clase I/genética , Adulto , Anciano , Biomarcadores de Tumor/análisis , Biomarcadores de Tumor/genética , Neoplasias Colorrectales/inmunología , Neoplasias Colorrectales/mortalidad , Neoplasias Colorrectales/patología , Reparación de la Incompatibilidad de ADN , Proteínas de Unión al ADN/análisis , Proteínas de Unión al ADN/deficiencia , Proteínas de Unión al ADN/genética , Neoplasias Endometriales/inmunología , Neoplasias Endometriales/mortalidad , Neoplasias Endometriales/cirugía , Endometrio/patología , Endometrio/cirugía , Femenino , Estudios de Seguimiento , Humanos , Histerectomía , Inmunohistoquímica , Persona de Mediana Edad , Endonucleasa PMS2 de Reparación del Emparejamiento Incorrecto/análisis , Endonucleasa PMS2 de Reparación del Emparejamiento Incorrecto/deficiencia , Endonucleasa PMS2 de Reparación del Emparejamiento Incorrecto/genética , Supervivencia sin Progresión , Estudios Retrospectivos , Salpingooforectomía , Microambiente Tumoral/genética , Microambiente Tumoral/inmunología , Proteína p53 Supresora de Tumor/genéticaRESUMEN
A woman in her 70s with main pancreatic duct dilatation was referred to our hospital. Various imaging examinations showed an extensive mass within the lumen of the main pancreatic duct in the head and body of the pancreas. The microscopic examination of a biopsy specimen revealed an adenocarcinoma. She was diagnosed with intraductal tubulopapillary adenocarcinoma of the pancreas;a pylorus-preserving total pancreatectomy was subsequently performed. However, 30 days after surgery, the patient presented with neck pain and left upper arm numbness. Results of magnetic resonance imaging and bone scintigraphy revealed a cervical spinal tumor that was subsequently biopsied. The patient was diagnosed with intraductal tubulopapillary adenocarcinoma with bone metastasis.
Asunto(s)
Adenocarcinoma , Carcinoma Ductal Pancreático , Neoplasias Pancreáticas , Adenocarcinoma/diagnóstico por imagen , Adenocarcinoma/cirugía , Anciano , Carcinoma Ductal Pancreático/cirugía , Femenino , Humanos , Páncreas/cirugía , Pancreatectomía , Conductos Pancreáticos , Neoplasias Pancreáticas/diagnóstico por imagen , Neoplasias Pancreáticas/cirugíaRESUMEN
BACKGROUND: The objective evaluation of endoscopic disease activity is key in ulcerative colitis (UC). A composite of endoscopic and histological factors is the goal in UC treatment. We aimed to develop an operator-independent computer-based tool to determine UC activity based on endoscopic images. METHODS: First, we built a computer algorithm using data from 29 consecutive patients with UC and 6 healthy controls (construction cohort). The algorithm (red density: RD) was based on the red channel of the red-green-blue pixel values and pattern recognition from endoscopic images. The algorithm was refined in sequential steps to optimise correlation with endoscopic and histological disease activity. In a second phase, the operating properties were tested in patients with UC flares requiring treatment escalation. To validate the algorithm, we tested the correlation between RD score and clinical, endoscopic and histological features in a validation cohort. RESULTS: We constructed the algorithm based on the integration of pixel colour data from the redness colour map along with vascular pattern detection. These data were linked with Robarts histological index (RHI) in a multiple regression analysis. In the construction cohort, RD correlated with RHI (r=0.74, p<0.0001), Mayo endoscopic subscores (r=0.76, p<0.0001) and UC Endoscopic Index of Severity scores (r=0.74, p<0.0001). The RD sensitivity to change had a standardised effect size of 1.16. In the validation set, RD correlated with RHI (r=0.65, p=0.00002). CONCLUSIONS: RD provides an objective computer-based score that accurately assesses disease activity in UC. In a validation study, RD correlated with endoscopic and histological disease activity.
Asunto(s)
Colitis Ulcerosa/diagnóstico , Colon , Colonoscopía/métodos , Procesamiento de Imagen Asistido por Computador/métodos , Mucosa Intestinal , Inteligencia Artificial , Biopsia/métodos , Colitis Ulcerosa/terapia , Colon/diagnóstico por imagen , Colon/patología , Femenino , Humanos , Mucosa Intestinal/diagnóstico por imagen , Mucosa Intestinal/patología , Masculino , Persona de Mediana Edad , Inducción de Remisión/métodos , Reproducibilidad de los Resultados , Sensibilidad y Especificidad , Índice de Severidad de la Enfermedad , Brote de los SíntomasRESUMEN
Human leukocyte antigen (HLA) class â molecules play a central role in anticancer immunity, but their prognostic value in oral squamous cell carcinoma (OSCC) remains unclear. We examined HLA class I expression in 2 distinct tumor compartments, namely, the tumor center and invasive front, and evaluated the association between its expression pattern and histopathological status in 137 cases with OSCC. Human leukocyte antigen class â expression was graded semiquantitatively as high, low, and negative. At the invasive front of the tumor, HLA class I expression was high in 72 cases (52.6%), low in 44 cases (32.1%), and negative in 21 cases (15.3%). The HLA class I expression in the tumor center was high in 48 cases (35.0%), low in 58 cases (42.4%), and negative in 31 cases (22.6%). The 5-year overall survival and disease-specific survival rates were good in cases with high HLA class I expression at the invasive front; however, there was no significant difference in survival based on HLA class I expression in the tumor center. In addition, high HLA class I expression was correlated with high CD8+ T cell density, whereas negative HLA class I expression was correlated with low CD8+ T cell density at the invasive front. These results suggest that it is easier for CD8+ T cells to recognize presented peptides in the case of high HLA class â expression at the tumor invasive front and could be a prognostic factor for OSCC.