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Background: COVID-19 is associated with higher mortality rates in patients with cancer. In this study, we aimed to evaluate the clinical outcomes, and laboratory and imaging data of patients with solid tumor infected with COVID-19 infection. Method(s): This is a cross-sectional retrospective study performed in 2020-2022 on 85 patients with a previous diagnosis of solid tumors infected with COVID-19. We included all patients with tumors of solid organs that were diagnosed with COVID-19 infection and required hospitalization those patients previously hospitalized for treatments and were infected with COVID-19 during hospitalization. Demographic data of patients were collected using a checklist. We collected data regarding clinical outcome (discharge, hospitalization or death), duration of hospitalization, requiring ICU admission, duration of hospitalization divided by received drugs and type of tumor and mean survival time. Furthermore, we collected laboratory data from all patients. The radiologic characteristics of patients were also extracted from their data. Result(s): Breast cancer was the most common solid tumor (34.9%), followed by lung cancer (19.3%). The mortality rate was 24.1% (20 patients). The highest mortality rate in this study was for metastatic intestinal cancer to the lung (100%, one patient), followed by metastatic prostatic cancer to lung (50%, three patients). The highest hospitalization duration was for patients with glioblastoma multiform (GBM) (30 days). The mean survival time among patients with mortality was 19.15+/-1.80 days. The mean CT severity score of all patients was 27.53+/-22.90. Patient's most common radiologic sign was air space consolidation (89.1%). The highest CT severity score was found in patients with stomach cancer (46.67+/-5.77). Conclusion(s): The mortality rate in this study was 24.1%. Based on the results of our study and previous research, special care should be provided to patients with solid tumors during the COVID-19 pandemic and in infected cases.Copyright © 2022, E-Century Publishing Corporation. All rights reserved.
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Background: Skull osteosarcoma is relatively rare, and it is difficult to be diagnosed according to medical history and imaging examination due to the complex structure and diverse components of the brain. Consequently, there is only a limited number of patients who can undergo neoadjuvant chemotherapy before the operation. Although neoadjuvant chemotherapy plays an important role in the treatment of osteosarcoma, there is still a "bottleneck" in the current treatment method which when pulmonary metastasis occurs, or surgical treatment is not Enneking appropriate. Under such circumstances, the choice of treatment can be an issue. Case: A 16-year-old male patient with multiple metastases of skull osteosarcoma was reported. The patient suffered not only tinnitus and hearing loss in the right ear but also right facial paralysis and headache. The preoperative brain MRI showed a tumor in the right cerebellopontine angle (CPA) area. He underwent skull tumor resection at another hospital in November 2018, during which process the biopsy revealed epithelioid osteoblastoma-like osteosarcoma. The patient had supplemental radiotherapy 1 month after surgery because of tumor recurrence. 32 months afterward, pulmonary metastases and multiple bone metastases were found. Then the patient underwent multiple conservative treatments which include Denosumab, Anlotinib, and DIA (cisplatin + ifosfamide + doxorubicin) chemotherapy at our hospital. After a series of 6 cycles of treatment, the patient can walk without aid. Lactate dehydrogenase (LDH) and Alkaline phosphatase (AKP) returned to a normal level. Fluorodeoxyglucose (FDG) metabolism in all bone metastases decreased to normal except for the ones in the proximal left femur, and the FDG metabolism in the left femur is significantly lower than that before treatment. Multiple bone metastases showed different extents of high-density calcification, and the volume of the local bone metastases has been reduced significantly. The patient's condition stayed stable at latest follow-up. Conclusion: We found that multiple conservative treatments, which include Denosumab, Anlotinib and DIA chemotherapy, can improve patients' life quality, and help avoid further osteolytic destruction for patients with skull osteosarcoma and multiple metastases. Its specific mechanism and scope of the application still need to be further studied.
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OBJECTIVE: Recent studies have shown that there may be a deterioration in sperm parameters in patients who had recovered from COVID-19 disease. We aimed to investigate the relationship between COVID-19 disease and semen parameters in idiopathic male infertility patients. PATIENTS AND METHODS: The study was conducted among male patients who applied with infertility between June 2021 and February 2022 following the approval of the Ethics Committee. Idiopathic infertility patients who could give semen analysis were included in the study. Detailed medical history of all patients was obtained. The presence of detectable causes of infertility was defined as exclusion criteria. The patients who had COVID-19 disease history (Reverse Transcriptase-PCR or Computed Tomography findings) in the last year were divided into two groups COVID-19 (+) and COVID-19 (-). The semen samples obtained from patients after a 3 day sexual abstinence in accordance with the WHO 2021 criteria were recorded. RESULTS: A total of 42 male idiopathic infertility patients who met the criteria were included in the study. It was analyzed that both groups were similar in terms of sociodemographic characteristics, comorbidities, and habits (p> 0.05). It was determined that 40.4% (n=17) had COVID-19 disease. The mean duration time after COVID-19 was 9.6 (4-17) months. Mean sperm concentration was found to be statistically significantly lower than the COVID-19 (-) group (41.59 +/- 17.4 vs. 58.8 +/- 21.9;p=0.021). Semen volume (3.05 +/- 0.7 vs. 3.32 +/- 0.6 mL;p>0.05), progressive sperm motility (34.05 +/- 20.96 vs. 43.00 +/- 16.94;p=0.12) and normal sperm morphology (3.47 +/- 1.42 vs. 3.08 +/- 1.41;p=0.41) were similar in both groups. The mean sperm concentration of the patients who recovered in the last 6 months (25.37 +/- 9.07 vs. 56.03 +/- 29.67 million/ml;p=0.013) compared to patients with >6 months after recovery (n=9) was found to be significantly lower. CONCLUSIONS: The COVID-19 disease can cause a significant decrease in sperm concentration in idiopathic infertility patients, especially in the first 6 months, and the rates of oligospermia and asthenospermia are higher.
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Background and objective Delays in the management of osteosarcoma (OGS) lead to tumor progression and the development of metastasis, resulting in a decrease in overall survival (OS). The primary objective of this study was to determine whether delays occur in implementing the individual steps in the management of OGS in South India. Methods In this study, core biopsy reports between October 2019 and October 2021 were retrospectively examined for a diagnosis of OGS. The primary outcome variables in this study were time to MRI, time to biopsy, time to biopsy report, time to neoadjuvant chemotherapy (NACT), time to surgery, and time to adjuvant chemotherapy (ACT). Statistical analysis was performed by comparing the outcome variables with the hypothesized mean. Results There were 38 patients with primary non-metastatic OGS. Of these, 92% received NACT, and 74% completed full treatment. The mean time to MRI was 11.3 ± 6.7 days, mean time to NACT was 15.3 ± 12.7 days, mean time to surgery was 31.1 ± 15.3 days, and mean time to ACT was 29.7 ± 10.1 days. Time to MRI was more than seven days in 68% of the cases, while time to NACT was more than seven days in 74%. Time to surgery was more than 21 days in 83% of the cases, and time to ACT was more than 21 days in 82% of the cases. Conclusion Based on our findings, there is a significant delay (p<0.05) in time to MRI, time to NACT, time to surgery, and time to ACT. The delay in time to surgery is more than the delay in time to MRI, time to NACT, and time to ACT. The delay is due to a variety of reasons, the most common being the long waiting period at the hospital.
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Single-particle tracking (SPT) directly measures the dynamics of proteins in living cells and is a powerful tool to dissect molecular mechanisms of cellular regulation. Interpretation of SPT with fast-diffusing proteins in mammalian cells, however, is complicated by technical limitations imposed by fast image acquisition. These limitations include short trajectory length due to photobleaching and shallow depth of field, high localization error due to the low photon budget imposed by short integration times, and cell-to-cell variability. To address these issues, we investigated methods inspired by Bayesian nonparametrics to infer distributions of state parameters from SPT data with short trajectories, variable localization precision, and absence of prior knowledge about the number of underlying states. We discuss the advantages and disadvantages of these approaches relative to other frameworks for SPT analysis.
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Mammals , Single Molecule Imaging , Animals , Bayes Theorem , Diffusion , Single Molecule Imaging/methodsABSTRACT
Background: CDK4/6 inhibitors showed a favorable progression-free survival (PFS) in DD LPS, a sarcoma bearing 12q 13-15 amplicon that implies CDK4 amplification. The median PFS was 4 and 7 months (m) for palbociclib and abemaciclib, respectively. Preclinical experiments in 10 sarcoma cell lines and 6 PDX models, including only one DD LPS, showed higher efficacy of anti-CDK4 in cases with high expression of CDK4 and low expression of p16. This rationale supported the design of a phase II trial exploring palbociclib in a wide range of sarcomas, excluding DD LPS. Methods: Progressing pretreated advanced soft tissue sarcoma, excluding DD LPS, or osteosarcoma adult patients (pts), whose tumors overexpressed CDK4 and underexpressed CDKN2A mRNA in a baseline mandatory biopsy, were enrolled. CDK4 and CDKN2A expression were assessed by qRT-PCR, using an external control as reference (Universal human reference RNA;Agilent Technologies). The primary endpoint was 6-m PFS rate. Minimax Simon's two-stage with type 1 and 2 errors of 10%, and null and alternative hypothesis of H0 15%, H1 40%, 6-month PFS rates were specified. The study will warrant further investigation if 6 or more pts had a PFS > 6 m from 21 evaluable pts. Palbociclib was administered orally at 125 mg/ day 21 out of 28 days. Pre-screening intended to increase the probability of positive profile in the baseline biopsy. Results: A total of 214 pts with 236 CDK4/ CDKN2A determinations were assessed for enrolment;141 for prescreening, in archive tumor sample, and 95 for screening, in a baseline biopsy. There were 38/141 (27%) and 28/95 (29%) pts with favorable mRNA profile from pre and screening, respectively. Twenty-two pts were enrolled with a median of previous systemic lines of 3 (1- 5). There were 9 different sarcoma subtypes, including 2 osteosarcomas. With a median FU of 10 m (0.4-23.3), the median PFS was 4.2 m (95% CI 0.9-7.4), while the 6- and 12-m PFS rates were 30% (95% CI 9-51) and 18% (95% CI 12-48) respectively. From 19 evaluable pts (1 early death by COVID, 1 withdrew consent and for 1 it was too early to be assessed) 11 had stable disease (58%) and 8 progressed (42%) as the best response. Patients with CDK4 expression above the median value had significantly longer mPFS in the univariate analysis: 5.9 m (95% CI 1.4-10.4) vs 1.9 m (95% CI 0.6- 3.2), p = 0.046;and longer OS: 15.5 m (95% CI 6.8-24.3) vs 10.6 m (95% CI 0-23.2), p = 0.047, respectively. The probability to find a positive profile in the screening was 29%, but this proportion increased up to 41% if in pre-screening had been positive. Conclusions: Palbociclib showed to be effective in a wide variety of sarcoma subtypes, other than DD LPS, selected by CDK4/CDKN2A biomarkers.
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The COVID-19 pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has drastically affected healthcare delivery to cancer patients, including those with malignant bone tumors, worldwide. Such cancer patients are more susceptible to COVID-19 infection and risk contracting the severe disease, but their holistic tumor management has also suffered a significant impact. Because of the acute shortage of healthcare resources due to their diversion in COVID management, substantial changes are needed in various aspects of management for high-grade tumor patients, particularly in developing countries and population-dense regions, so that their evidence-based appropriate treatment is ensured. Owing to a lack of consensus regarding the ideal course of action for the management of malignant bone tumors in the current situation, many such patients often get neglected, leading to loss of life/limb. This review elaborates on various guidelines proposed by different healthcare organizations and institutes regarding the modified care pathways for malignant bone neoplasms in the current coronavirus pandemic. The early published results of these modified care pathways and the changes in the oncology practice brought about by the pandemic are also discussed.
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Purpose or Objective The role of perioperative treatment in radiation-induced and in-field recurrent sarcomas (RIS/IFRS) is unknown. Reirradiation may be associated with a risk of significant toxicity;thus, it is rarely used. We hypothesized that the combination of preoperative or definitive 12x 3 Gy radiotherapy (RT) with or without integrated 3.5 Gy to 42 Gy boost combined with regional hyperthermia twice a week will enable satisfactory local control without significant late toxicity in patients with RIS/IFRS. Materials and Methods A prospective phase II, single-arm clinical trial was conducted. We included patients with locally advanced RIS/IFRS without distant metastases. Treatment combined three weeks of radiotherapy, four fractions per week, 3 or 3.5 Gy per fraction, with regional hyperthermia, followed by surgery or observation. The choice of the boost or no-boost regimen was based on resectability (Figure 1). The intervention would be deemed tolerable if significant RT-related (grade 3+ CTCAE 5.0) late adverse events occur in less than 20% of patients. We planned to enroll 20 patients based on Wilson’s method for calculation of confidence intervals. (Figure Presented) Results We recruited 20 patients. All patients completed the treatment without interruptions. Eight of them had RIS whereas twenty were diagnosed with IFRS. Patients’ characteristics were provided in Table 1. Twelve patients from planned 15 underwent surgery. Two patients with potentially resectable tumors did not undergo surgery due to COVID-related reasons. One patient preferred not to undergo surgery after the preoperative no-boost regimen. The remaining five patients were deemed unresectable at the enrollment and received the simultaneous boost. In five patients who underwent resection, we observed extensive pathological response according to the European Organization for Research and Treatment of Cancer-Soft Tissue and Bone Sarcoma Group recommendations for pathological examination and reporting, namely grade A in two cases and grade C in three cases. In four patients we observed complete radiological response. The median follow-up was 13 months. In 14 patients we noted mild or moderate radiation dermatitis. One patient experienced grade 2 gastrointestinal toxicities. From the late toxicities, we observed restricted limb mobility (grade 1) in one patient and chronic skin ulceration (grade 2) in one patient. None of the patients who developed grade 3 or higher late toxicity. Two patients who received the no-boost regimen and did not undergo resection developed local progression. One patient experienced borderline local relapse after surgery. None of the patients who received the boost regimen developed local progression. Three patients developed distant metastases. One patient was lost to follow-up. (Figure Presented) Conclusion Preliminary data suggest that the tolerance of the regimen is acceptable;however, data regarding late toxicity may change during the follow-up period. Boost may play a significant role in achieving local control in non-resected tumors.