PubMed Journals Articles About "Moffitt Researchers Identify Molecular Characteristics Leptomeningeal Melanoma Metastases" RSS

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Showing "Moffitt researchers identify molecular characteristics leptomeningeal melanoma metastases" PubMed Articles 1–25 of 34,000+

High-resolution MRI demonstrates that more than ninety percent of small intracranial melanoma metastases develop in close relationship to the leptomeninges.

Despite classic teaching that intracranial metastases typically arise at the grey-white matter junction, small intracranial melanoma metastases (IMM) are frequently observed at the interface between the cortex and leptomeninges (i.e. "corticomeningeal interface"), suggesting possible leptomeningeal origin.

Intra-patient Heterogeneity of BRAF and NRAS Molecular Alterations in Primary Melanoma and Metastases.

Mutations in MAPK signalling genes are driver events in melanoma, and have therapeutic relevance in the metastatic and adjuvant setting. This study evaluated the intra-patient heterogeneity of BRAF, NRAS and c-KIT mutational status between 30 primary melanomas and 39 related metastases, using molecular analysis and immunohistochemistry. BRAF mutations were identified in 46.7% of primary melanomas and 48.7% of metastases and NRAS mutations in 20% and 25.6%, respectively. Intra-patient heterogeneity was detec...

Intracranial antitumor activity with encorafenib plus binimetinib in patients with melanoma brain metastases: A case series.

Sixty percent of patients with stage IV melanoma may develop brain metastases, which result in significantly increased morbidity and a poor overall prognosis. Phase 3 studies of melanoma usually exclude patients with untreated brain metastases; therefore, clinical data for intracranial responses to treatments are limited.

Leptomeningeal metastases arising from gynecological cancers.

Most cases of leptomeningeal metastasis (LM) arise from solid tumors, such as breast cancer, lung cancer, or malignant melanoma. LM arising from gynecological cancers are extremely rare. Longer survival owing to recent advances in chemotherapy and other treatments has contributed to the increased frequency of gynecological cancers metastasizing to the central nervous system (CNS). Detailed information regarding LM is scarce; therefore, we conducted a study concerning LM arising from primary gynecological ca...

Primary diffuse leptomeningeal glioneuronal tumors of the central nervous system: Report of three cases and review of literature.

Primary diffuse leptomeningeal glioneuronal tumors (DLGNT) are rare tumors, recently recognized as a unique entity based on their unique pathologic and clinical characteristics. We report three cases of DLGNT and compare their clinical characteristics and presentation with other reported cases, and with primary leptomeningeal gliomatosis. Because their prognosis is better than that of diffuse leptomeningeal gliomatosis, and pathologic diagnosis may be difficult, clinicians should consider this diagnosis in ...

Adjuvant Whole-Brain Radiation Therapy Compared With Observation After Local Treatment of Melanoma Brain Metastases: A Multicenter, Randomized Phase III Trial.

The brain is a common site of metastasis for patients with high-risk melanoma. Although surgery or stereotactic radiosurgery are highly effective local treatments for a small number of metastases, there is a high risk of developing additional brain metastases. The role of adjuvant whole-brain radiotherapy (WBRT) in reducing new metastases is controversial, with a lack of high-level evidence specifically for melanoma.

Nodular Leptomeningeal Disease - A Distinct Pattern of Recurrence After Post-Resection Stereotactic Radiosurgery for Brain Metastases: A Multi-Institutional Study of Inter-Observer Reliability.

For brain metastases, surgical resection with postoperative stereotactic radiosurgery (SRS) is an emerging standard of care. Postoperative cavity SRS is associated with a specific, under-recognized pattern of intracranial recurrence, herein termed nodular leptomeningeal disease (nLMD), which is distinct from classical leptomeningeal disease (cLMD). We hypothesized that there is poor consensus regarding the definition of LMD, and that a formal, self-guided training module will improve inter-rater reliability...

DCE-MRI perfusion predicts pseudoprogression in metastatic melanoma treated with immunotherapy.

It can be challenging to differentiate pseudoprogression from progression. We assessed the ability of dynamic contrast enhanced T1 MRI (DCE-MRI) perfusion to identify pseudoprogression in melanoma brain metastases.

Remote leptomeningeal dissemination in olfactory neuroblastoma mimicking multiple parasagittal meningiomas: a diagnostic and therapeutic challenge.

Olfactory neuroblastoma (ON) is a highly aggressive and locally recurrent neoplasm. Distant systemic metastases are not uncommon, but remote leptomeningeal dissemination is extremely rare.

The combination of stereotactic radiosurgery with immune checkpoint inhibition or targeted therapy in melanoma patients with brain metastases: a retrospective study.

Evidence pointing to a synergistic effect of stereotactic radiosurgery (SRS) with concurrent immunotherapy or targeted therapy in patients with melanoma brain metastases (BM) is increasing. We aimed to analyze the effect on overall survival (OS) of immune checkpoint inhibitors (ICI) or BRAF/MEK inhibitors initiated during the 9 weeks before or after SRS. We also evaluated the prognostic value of patients' and disease characteristics as predictors of OS in patients treated with SRS.

Metastases to the central nervous system: Molecular basis and clinical considerations.

Metastatic tumors are the most common malignancies of the central nervous system (CNS) in adults. CNS metastases are associated with unfavorable prognosis, high morbidity and mortality. Lung cancer is the most common source of brain metastases, followed by breast cancer and melanoma. Rising incidence is primarily due to improvements in systemic control of primary malignancies, prolonged survival and advances in cancer detection.

Extracranial Metastases From Glioblastoma With Primitive Neuronal Components on FDG PET/CT.

A 17-year-old girl with World Health Organization grade IV glioblastoma with primitive neuronal components (histone H3 G34-mutant and IDH1 wild type) underwent whole-body FDG PET/CT staging due to vertebral metastases on initial MRI. PET/CT revealed extracranial metastatic disease with spinal leptomeningeal dissemination, osseous metastases, and peritoneal seeding via a ventriculoperitoneal shunt. Glioblastoma is uncommon in pediatric patients and particularly those with primitive neuronal components. Extra...

Osimertinib for patients with leptomeningeal metastases associated with epidermal growth factor receptor T790M positive advanced NSCLC: the AURA LM analysis.

Osimertinib has shown promising activity in patients with leptomeningeal metastases (LM) from epidermal growth factor receptor (EGFR) positive NSCLC at 160 mg once daily (qd) (BLOOM; NCT02228369). We report LM activity with osimertinib 80 mg qd in a retrospective analysis of studies across the AURA program (AURA extension, AURA2, AURA17 and AURA3).

Leptomeningeal Seeding in Choroidal Melanoma after Enucleation Surgery.

Osimertinib in Patients With Epidermal Growth Factor Receptor Mutation-Positive Non-Small-Cell Lung Cancer and Leptomeningeal Metastases: The BLOOM Study.

In this phase I study (BLOOM), osimertinib, a third-generation epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI), was evaluated in patients with leptomeningeal metastases (LMs) from EGFR-mutated (EGFRm) advanced non-small-cell lung cancer (NSCLC) whose disease had progressed on previous EGFR-TKI therapy.

Endoscopic diagnosis of gastrointestinal melanoma.

Gastrointestinal (GI) melanoma can be diagnosed by endoscopy combined with biopsy and subsequent pathological examination. However, the disease may be misdiagnosed due to the limited awareness of GI melanoma. We aimed to describe characteristics of GI melanoma that can be detected by endoscopy and endoscopic ultrasound (EUS). We retrospectively analyzed patients with GI melanoma diagnosed by endoscopic biopsy or postoperative pathology between August 2008 and January 2017. Images of endoscopic examinations,...

Appearance of cutaneous melanoma and subcutaneous metastases in metastatic gastric carcinoma undergoing chemotherapy with oral 5-fluorouracil prodrug.

Metastatic skin lesions of gastric cancers usually appear as nonspecific, firm, and hyperpigmented nodules. However, they occasionally present as unusual skin manifestations that mimic other skin disorders. We describe a case of multiple cutaneous metastases from gastric cancer resembling sebaceous cysts with a synchronous melanoma, in a patient after fluoropyrimidine-based systemic chemotherapy. Melanoma occurring as a second cancer has been recognized in patients having undergone previous chemotherapy or ...

Clinical characteristics and leptomeningeal collateral status in pediatric and adult patients with ischemic moyamoya disease.

Previous studies have found significant differences in clinical characteristics between pediatric and adult moyamoya disease (MMD) patients, but few studies have focused on the factors underlying these differences. We aimed to investigate the differences in leptomeningeal collateral (LMC) status between pediatric and adult MMD patients and to analyze the effects of LMCs on clinical characteristics and therapeutic prognosis.

Diffuse Leptomeningeal Glioneuronal Tumor: A unique leptomeningeal tumor entity.

Diffuse leptomeningeal glioneuronal tumor (DLGNT) is a recent addition to the WHO classification schema of brain tumors, under the heading of neuronal and mixed neuronal-glial tumors. The imaging appearance of this entity is classical; however, it is often misdiagnosed because of its rarity as well as resemblance to granulomatous/leptomeningeal etiologies on imaging as well as clinical presentation.

Leptomeningeal metastasis from solid tumors.

Central nervous system (CNS) metastasis from systemic cancers can involve the brain parenchyma, leptomeninges (pia, subarachnoid space and arachnoid mater), and dura. Leptomeningeal metastases (LM), also known by different terms including neoplastic meningitis and carcinomatous meningitis, occur in both solid tumors and hematologic malignancies. This review will focus exclusively on LM arising from solid tumors with a goal of providing the reader an understanding of the epidemiology, pathophysiology, clinic...

Purely Meningeal Intracranial Relapse of Melanoma Brain Metastases after Surgical Resection and Immunotherapy as a Unique Disease Progression pattern: Our Experience and Review of the Literature.

We present a case of 72-years-old man, with history of metastatic melanoma diagnosed up in 2015 presenting a stable disease in treatment with Dabrafenib, who was surgically treated for a presumed intracranial parieto-occipital metastasis. He presented 1 month later with a meningeal lesion associated with a subdural haematoma. A second surgical treatment confirmed the diagnosis of meningeal recurrence of metastatic melanoma. The most recent literature lacks of studies defining the clinical phenomena of an ea...

The Landmark Series: Regional Therapy of Recurrent Cutaneous Melanoma.

In-transit melanoma represents a distinct disease pattern in which melanoma recurs as dermal or subcutaneous nodules between the primary melanoma site and the draining regional lymph node basin. The disease pattern is often not amenable to complete surgical resection. Since the 1950s, regional therapies have been explored for the treatment of this disease entity, with the goal of maximizing delivery of the therapeutic agent to the tumor while minimizing systemic toxicity. We reviewed landmark studies descri...

Comparison of Survival After Mohs Micrographic Surgery vs Wide Margin Excision for Early-Stage Invasive Melanoma.

Melanoma is among the most common malignant neoplasms in the United States, with 91 270 cases estimated to be diagnosed in 2018. Since 2012, Mohs micrographic surgery (MMS) has gained popularity in the treatment of melanoma in situ. Although current guidelines for invasive melanoma without nodal metastases recommend surgery with wide margin excision (WME), use of MMS for this disease has increased as well, particularly in early stages. How the survival outcomes after each procedure compare with one anothe...

Immunological analyses reveal an immune subtype of uveal melanoma with a poor prognosis.

Uveal melanoma is an aggressive intraocular malignancy that often exhibits low immunogenicity. Metastatic uveal melanoma samples frequently exhibit monosomy 3 or deficiency. In this study, we used bioinformatic methods to investigate the immune infiltration of uveal melanoma samples in public datasets. We first performed Gene Set Enrichment/Variation Analyses to detect immunological pathways that are altered in tumors with monosomy 3 or deficiency. We then conducted an unsupervised clustering analysis to ...

Melanoma Metabolism: Cell Survival and Resistance to Therapy.

Cutaneous melanoma is one of the most aggressive types of cancer, presenting the highest potential to form metastases, both locally and distally, which are associated with high death rates of melanoma patients. A high somatic mutation burden is characteristic of these tumours, with most common oncogenic mutations occurring in the BRAF, NRAS and NF1 genes. These intrinsic oncogenic pathways contribute to the metabolic switch between glycolysis and oxidative phosphorylation metabolisms of melanoma, facilitati...

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