PET/CT-based radiation therapy for lung cancers: Pros and cons of proton vs. photon radiation therapy

1224Aim:Radeation therapy (RT) is an important component of cancer treatment for both early stage and locally advanced lung cancers. Photon and proton therapies are both utilized for RT but have different physical characteristics. Photon RT actively exposes healthy tissues along the beam path in front of and beyond the tumor to incidental irradiation. However, due to a central-axis depth-dose distribution pattern known as the spread-out Bragg peak (SOBP), proton RT generally has a more optimal dose delivery in comparison to 3D conformal photon therapy and intensity-modulated radiation therapy (IMRT). The SOBP may potentially allow for improvements in clinical outcomes in select cases by more safely and efficiently applying dose escalation/acceleration or RT with other treatment modalities like chemotherapy and surgery without increasing side effects such as radiation pneumonitis in lung cancer. Although proton RT is a promising technique on a clinical and scientific level, some challenges exist including target determination and motion effects. Proton doses are very sensitive to anatomical changes and motion effects, intrafractional tumor motion and normal tissue motion need to be taken into account for each patient, particularly in customized proton compensator design. Breathing causes lung and other thoracic normal tissues as well as cancer lesions to move during treatment. With the use of respiratory-gated 4D-positron emission tomography (PET) and 4D-computed tomography (C...
Source: Journal of Nuclear Medicine - Category: Nuclear Medicine Authors: Tags: Educational Exhibits Source Type: research

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ConclusionsOccult nodal disease was frequently identified in peripheral N1 stations (11-13) in patients with small (≤2 cm) clinical N0 NSCLC. Hilar lymphadenectomy is essential for accurate staging in the management of patients with small clinical N0 NSCLC.
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
Conclusion: MiR-7-5p suppresses NSCLC metastasis. Targeting miR-7-5p may contribute to the success of NSCLC therapy. PMID: 31832068 [PubMed - in process]
Source: Cellular and Molecular Biology Letters - Category: Biochemistry Authors: Tags: Cell Mol Biol Lett Source Type: research
Publication date: Available online 13 December 2019Source: Journal of PhysiotherapyAuthor(s): Morten Quist
Source: Journal of Physiotherapy - Category: Physiotherapy Source Type: research
ConclusionThis may be achieved through adoption of stringent air pollution regulations and sustainable city planning. Increase in urban green infrastructures and improving road transportation will reduce PM2.5 levels in urban environment, thereby safeguarding human health from air pollution and improving citizens’ well-being.
Source: Clinical Epidemiology and Global Health - Category: Epidemiology Source Type: research
We present the case of an asymptomatic woman, a chronic heavy smoker, who presented with an incidental lung mass and mediastinal lymphadenopathy. Bronchoscopy with transbronchial biopsy and endobronchial ultrasound-guided transbronchial needle aspiration did not show malignancy. A positron emission tomography/computed tomography scan showed increased uptake with a standardized uptake value of 26.4 in the mediastinal lymph node and an additional hypermetabolic right supraclavicular lymph node. Surgical biopsy of the supraclavicular node revealed non-necrotizing granuloma. Discussion of the clinical dilemma is provided.
Source: Respiratory Medicine Case Reports - Category: Respiratory Medicine Source Type: research
Conclusion: No statistical difference was observed between DAKO and BIOCARE®, therefore we propose that both techniques can be used in order to investigate the expression of programmed ligand 1 with safety. PD-L1 expression was higher in the central mass instead of the lymphnodes.
Source: Journal of Cancer - Category: Cancer & Oncology Authors: Tags: Research Paper Source Type: research
The host immune system plays a crucial role in the surveillance, recognition and elimination of tumor cells. Recent studies found that Human lymphocyte antigen class I (HLA I) genes, Killer cell immunoglobulin-like receptor (KIR) genes and HLA/KIR combinations play a role in the defense against tumor cells. To evaluated the associations between HLA I genes, KIR genes and HLA/KIR combinations and non-small cell lung cancer (NSCLC) in a Chinese Han population, a total of 229 patients with NSCLC (adenocarcinoma) and 217 healthy individuals were studied. Our results showed that the HLA-C*08:01 allele occurred at a significantl...
Source: Journal of Cancer - Category: Cancer & Oncology Authors: Tags: Research Paper Source Type: research
Conclusion: Radiobiological analysis reveals small differences between the models and suggested that the LQ model is applicable for modeling LC using SBRT to treat lung cancer, even when an extremely high fractional dose is used.
Source: Journal of Cancer - Category: Cancer & Oncology Authors: Tags: Research Paper Source Type: research
Background: MiR-92a has been discovered to be involved in the malignant behavior of various types of cancers. However, the particular clinical and prognostic roles of miR-92a in tumors still need to be identified more precisely. The current meta-analysis assessed the prognostic value of miR-92a in various carcinomas.Methods: Systematic literature searches of PubMed, PMC, Web of Science (WOS), Embase in English and Wanfang, SinoMed and the China National Knowledge Infrastructure (CNKI) in Chinese up to Jan 15th 2019 were conducted for eligible studies. Twenty studies involving a total of 2573 patients were included in the a...
Source: Journal of Cancer - Category: Cancer & Oncology Authors: Tags: Research Paper Source Type: research
Insulin-like growth factor-1 (IGF-1) -induced epithelial-mesenchymal transition (EMT) plays a key role in the metastasis and drug resistance of non-small cell lung cancer (NSCLC). Sphingosine kinase-1 (SphK1) is also involved in EMT of NSCLC. However, the interaction between SphK1 and IGF-1 in the EMT of NSCLC is largely unknown. To clarify this issue, we examined the involvement of SphK1 in IGF-1-induced EMT using human lung cancer cell line A549, and its paclitaxel-resistant subline. Cell viability was evaluated by cell counting kit-8 assay; Migratory ability was examined using scratch wound healing test; Protein express...
Source: Journal of Cancer - Category: Cancer & Oncology Authors: Tags: Research Paper Source Type: research
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