Malignant Pericardial Effusion Research Articles

A case series of malignant pericardial effusion

A case series of malignant pericardial effusion

Abstract 946: Landscape of HRD aberration in EGFR mutated lung cancer and the role of PARP-inhibitor in EGFR mutated lung cancer with HRD aberration

Abstract Introduction: Olaparib, an oral poly polymerase (PARP) inhibitor has received approval for treating malignancies displaying homologous recombination deficiency (HRD). Current data is insufficient in establishing the role of PARP inhibitors in non-small cell lung cancer (NSCLC) in the setting of third generation EGFR tyrosine kinase inhibitor (TKI) use. Preclinical investigation suggests heightened PARP inhibitor sensitivity of TKI-resistant EGFR mutant NSCLC cells compared to TKI-sensitive cells. Methods: We utilized The Cancer Genome Atlas (TCGA) to investigate the prevalence of HRD gene mutations in patients with NSCLC harboring EGFR mutations. We also present a case demonstrating a favorable response to the dual therapy of olaparib and osimertinib in NSCLC harboring EGFR, RAD50, and ARID1A mutations that progressed on osimertinib. Results: There were 2298 patients in the NSCLC cohort (MSKCC database). Among 687 patients with EGFR mutations, 24 patients (3.5%) exhibited ARID1A mutations, 8 patients (1.2%) had BRCA1 mutations, 11 patients (1.6%) had BRCA2 mutations, and 5 (0.7%) had RAD50 mutations. A 71-year-old female presented with stage IV adenocarcinoma of the lung. She had recurrent malignant pericardial effusion requiring pericardiocentesis for previous cardiac tamponade. Computed tomography (CT) of the chest revealed a 3cm irregular left hilar mass with bilateral mediastinal and hilar lymph nodes. Tissue next generation sequencing (NGS) at baseline identified EGFR exon19 deletion along with RAD50 R726H which is a HRD pathway gene. Circulating tumor DNA (ct-DNA) NGS (Guardant360) showed EGFR E746_A750del 4.8%. The patient achieved partial response to osimertinib for 28 months. Follow-up CT showed disease progression. Olaparib 200mg twice daily was added to osimertinib based on repeat ct-DNA NGS indicating a new ARID1A alteration (splice site SNV) along with the known BRCA1 mutation. Follow up scans currently have consistently demonstrated ongoing partial response for 19 months. Combining olaparib with osimertinib can be effective in an osimertinib-resistant NSCLC patient with EGFR mutation and HRD aberration. The favorable response could be attributed not only to pre-existing RAD50 mutation but also to acquired mutations in ARID1A HRD genes. Conclusion: HRD aberrations are uncommon in EGFR mutated lung cancer patients. Further investigation on the role of PARP inhibitor in EGFR mutated lung cancer is warranted. Citation Format: Jinah Kim, Horyun Choi, Liam Il-Young Chung, Young Kwang Chae. Landscape of HRD aberration in EGFR mutated lung cancer and the role of PARP-inhibitor in EGFR mutated lung cancer with HRD aberration [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 946.

Pericardiocentesis versus window formation in malignant pericardial effusion: trends and outcomes

ObjectivesMalignant pericardial effusion (MPE) in patients with cancer is associated with poor prognosis. This study aimed to compare clinical outcomes in patients with cancer who underwent pericardiocentesis versus pericardial window...

Malignant pleural effusion and pericardial effusion, an unusual presentation of metastatic adenoid cystic carcinoma of the floor of mouth: A case report with cyto-histopathological correlation.

Adenoid cystic carcinoma (ACC) is an uncommon tumour that represents 5%-10% of salivary gland tumours and 1% of all head and neck malignancies. It is characterised by a protracted clinical course with late metastasis and poor long-term prognosis. We report the case of a 38-year-old woman presenting with pulmonary and pleural metastases, on the background of ACC of the floor of mouth, which had been treated 4 years ago with surgical excision and radiotherapy. Cytological evaluation of the pleural effusion showed exfoliated ACC tumour cells. Despite palliative chemotherapy, the patient developed disease progression including metastatic spread to the pericardium, and died of disease within a year. This case illustrates an unusual presentation of ACC and highlights the importance of considering this entity when encountering a basaloid neoplasm in extra-salivary locations.

Long-Term Survival of American Joint Committee on Cancer 8th Edition Staging Descriptors for Clinical M1a Non-Small Cell Lung Cancer

The American Joint Committee on Cancer (AJCC) 8th Edition TNM staging manual for non-small cell lung cancer (NSCLC) M1a descriptors includes tumors seen with malignant pleural or pericardial effusion (ie, M1a-Effusion), pleural or pericardial nodule(s) (ie, M1a-Pleural), or separate tumor nodule(s) in a contralateral lobe (ie, M1a-Contralateral). Is M1a NSCLC seen with malignant pleural or pericardial effusion associated with worse survival compared with other types of M1a NSCLC? Patients with cT1-4, N0-3, M1a NSCLC (satisfying a single M1a descriptor of M1a-Effusion, M1a-Pleural, or M1a-Contralateral), according to AJCC 8th edition staging criteria, in the National Cancer Database from 2010 to 2015 were included. Overall survival was evaluated by using Kaplan-Meier analysis, multivariable-adjusted Cox proportional hazards modeling, and propensity score matching. Of the 25,716 patients who met study eligibility criteria, 12,756 (49.6%) presented with M1a-Effusion tumors, 3,589 (14.0%) with M1a-Pleural tumors, and 9,371 (36.4%) with M1a-Contralateral tumors. In multivariable-adjusted analysis, M1a-Effusion tumors were associated with worse overall survival than M1a-Pleural tumors (hazard ratio [HR], 1.48; 95%CI, 1.40-1.56; P< .001) and M1a-Contralateral tumors (HR: 1.51; 95%CI, 1.46-1.57; P< .001). No significant differences were found in overall survival between patients with M1a-Pleural tumors vsM1a-Contralateral tumors (HR, 0.98; 95%CI, 0.93-1.03; P= .42). In a propensity score-matched analysis of 5,581 patients with M1a-Effusion tumors and 5,581 patients with other M1a tumors (ie, M1a-Contralateral or M1a-Effusion), those with M1a-Effusion tumors had worse 5-year overall survival than patients with other M1a tumors (M1a-Effusion 6.4%[95%CI, 5.7-7.1] vsM1a-Other 10.6%[95%CI, 9.7-11.5]; P< .001). In this national analysis of AJCC 8th Edition cT1-4, N0-3, M1a NSCLC, tumors with malignant pleural or pericardial effusion were associated with worse overall survival than those with either pleural or contralateral pulmonary nodules. These findings may be taken into consideration for the upcoming 9th edition of the lung cancer staging guidelines.

Effects of intrapericardial administration after catheter drainage on malignant pericardial effusion in non-small cell lung cancer: A real-world study.

Malignant pericardial effusion (MPE) is a serious complication of cancer that can be potentially deadly. It usually occurs in advanced or terminal stages of the disease, and as a result, patients with MPE often have a poor prognosis. There is a limited amount of research available that directly compares the effectiveness and safety of intrapericardial drug administration following pericardial drainage versus catheter drainage alone in non-small cell lung cancer (NSCLC) patients who have MPE. We retrospectively included 86 patients with NSCLC with MPE at Zhejiang Cancer Hospital. Survival and recurrence estimates were determined with the Kaplan-Meier method. We divided the 86 patients with NSCLC into two groups: a pericardial drainage group (34 out of 86, 39.5%) and an intrapericardial administration group (52 out of 86, 60.5%). The response rates were 70.6% and 76.9% (p = 0.510), respectively. The median OS was 132.0 and 234.0 days (p = 0.579), respectively. The median time to recurrent drainage was 43.0 and 104.0 days (p = 0.170), respectively. The incidence of adverse events (AEs) was 44.1% and 61.5% (p = 0.113), respectively. The most frequent AEs were pain (27.9%) and fever (24.4%). Additionally, two patients in the intrapericardial administration group died of cardiac arrest. Compared with catheter drainage alone, intrapericardial medication infusion during catheter drainage did not have significantly different effects. AEs require close monitoring and management.

Rare Adenosquamous Lung Cancer Inducing Large Hemorrhagic Pericardial Effusion in An Undiagnosed Patient

While lung cancer is the leading cause of cancer mortality, only 2% of non-small cell lung cancer (NSCLC) cases are classified as the adenosquamous subtype. Here we present a case of a middle-aged man who presented with atypical symptoms of massive malignant hemorrhagic pericardial effusion without cardiac tamponade, induced by adenosquamous non-small cell lung carcinoma. Malignant hemorrhagic pericardial effusions are rare, and large volume ones are even rarer. The patient’s advanced malignancy was undiagnosed at presentation and was only discovered through investigations carried out for his pericardial disease. Malignant pericardial effusion may be the initial symptom of malignancy in some patients. Furthermore, adenosquamous carcinoma is a rare type of NSCLC whose response to chemotherapy is limited. Further studies of this rare subtype are warranted to improve patient prognosis.

Cardiac tamponade during pembrolizumab treatment in a patient with ovarian cancer: a case report.

We present the case of a 39-year-old woman with platinum-resistant ovarian cancer who was treated with pembrolizumab. After five cycles of pembrolizumab treatment, she suddenly developed cardiac tamponade with a pleural effusion. The malignant pericardial and pleural effusion had increased, while the other malignant lesions had diminished in size. After pericardial and pleural drainage, no re-accumulation occurred. Pembrolizumab was continued and the patient did not have tumor progression for > 20months. In some patients with pembrolizumab-induced cardiac tamponade, continuation of pembrolizumab treatment may be possible if other lesions decrease in size and the pericardial effusion can be controlled after drainage.

Mediastinal gray zone lymphoma in a pregnant woman presenting with cardiac tamponade

BackgroundMediastinal gray zone lymphoma is a newly recognized rare B cell neoplasm, which is challenging in diagnosis and treatment.Case presentationIn the current study, we aimed to report a 25-year-old pregnant woman at 25 weeks of gestation who presented with chronic cough and progressive shortness of breath, hypotension, tachycardia, and tachypnea. A large circumferential pericardial effusion with compressive effect on the right atrium and right ventricle and a large extracardiac mass with external pressure to mediastinal structures were seen on trans thoracic echocardiography. The emergency pericardiocentesis was performed with the diagnosis of cardiac tamponade. Also, CMR revealed a huge heterogeneous anterior mediastinal mass, and the pathology and the immunohistochemistry of the mass biopsy revealed gray zone lymphoma with positive CD3, CD20, CD30, CD45, PAX5, and negative CD15 expression. Three courses of chemotherapy with the CHOP regimen were performed with an acceptable response every three weeks before delivery. A caesarian section was performed at 37 weeks without any problem for the patient and fetus, and chemotherapy will be started three weeks after delivery.ConclusionCardiac tamponade as an emergency condition occurred in this pregnant patient by malignant pericardial effusion and mediastinal mass pressure. Accurate diagnosis and on time interventions caused a significant improvement and a successful delivery.

Cytopathological characterization of ascites for the diagnosis of serous ovarian carcinoma

Objective: To investigate the cytomorphological and immunocytochemical features of tumor cells in the ascites of ovarian plasmacytoma (SOC). Methods: Specimens of serous cavity effusions were collected from 61 tumor patients admitted to the Affiliated Wuxi People's Hospital of Nanjing Medical University from January 2015 to July 2021, including ascites from 32 SOC, 10 gastrointestinal adenocarcinomas, 5 pancreatic ductal adenocarcinomas, 6 lung adenocarcinomas, 4 benign mesothelial hyperplasia and 1 malignant mesothelioma patients, pleural effusions from 2 malignant mesothelioma patients and pericardial effusion from 1 malignant mesothelioma. Serous cavity effusion samples of all patients were collected, conventional smears were made through centrifugation, and cell paraffin blocks were made through centrifugation of remaining effusion samples. Conventional HE staining and immunocytochemical staining were applied to observe and summarize cytomorphological characteristics and immunocytochemical characteristics. The levels of serum tumor markers carbohydrate antigen 125 (CA125), carcinoembryonic antigen (CEA) and carbohydrate antigen 19-9 (CA19-9) were detected. Results: Of the 32 SOC patients, 5 had low-grade serous ovarian carcinoma (LGSOC) and 27 had high-grade serous ovarian carcinoma (HGSOC). 29 (90.6%) SOC patients had elevated serum CA125, but the difference was not statistically significant between them and patients with non-ovarian primary lesions included in the study (P>0.05); The serum CEA was positive in 9 patients with gastrointestinal adenocarcinoma and 5 patients with lung adenocarcinoma, and the positive rate was higher than that in SOC patients (P<0.001); The serum CA19-9 was positive in 5 patients with gastrointestinal adenocarcinoma and 5 patients with pancreatic ductal adenocarcinoma, and the positive rate was higher than that in SOC patients (P<0.05). The serum CA125, CEA and CA19-9 were within the normal range in 4 patients with benign mesothelial hyperplasia. LGSOC tumor cells were less heterogeneous and aggregated into small clusters or papillary pattern, and psammoma bodies could be observed in some LGSOC cases. The background cells were fewer and lymphocytes were predominant; the papillary structure was more obvious after making cell wax blocks. HGSOC tumor cells were highly heterogeneous, with significantly enlarged nuclei and varying sizes, which could be more than 3-fold different, and nucleoli and nuclear schizophrenia could be observed in some cases; tumor cells were mostly clustered into nested clusters, papillae and prune shapes; there were more background cells, mainly histiocytes. Immunocytochemical staining showed that AE1/AE3, CK7, PAX-8, CA125, and WT1 were diffusely positively expressed in 32 SOC cases. P53 was focally positive in all 5 LGSOCs, diffusely positive in 23 HGSOCs, and negative in the other 4 HGSOCs. Most of adenocarcinomas of the gastrointestinal tract and lung had a history of surgery, and tumor cells of pancreatic ductal adenocarcinoma tend to form small cell nests. Immunocytochemistry can assist in the differential diagnosis of mesothelial-derived lesions with characteristic "open window" phenomenon. Conclusion: Combining the clinical manifestations of the patient, the morphological characteristics of the cells in the smear and cell block of the ascites can provide important clues for the diagnosis of SOC, and the immunocytochemical tests can further improve the accuracy of the diagnosis.

Pericardial Fluid Analysis in Diagnosis and Prognosis of Patients Who Underwent Pericardiocentesis

In this study, we aimed to examine the diagnostic yield of pericardial fluid biochemistry and cytology and their prognostic significance in patients with percutaneously drained pericardial effusions, with and without malignancy. This is a single-center, retrospective study of patients who underwent pericardiocentesis between 2010 and 2020. Data were extracted from electronic patient records, including procedural information, underlying diagnosis, and laboratory results. Patients were grouped into those with and without underlying malignancy. A Cox proportional hazards model was used to analyze the association of variables with mortality. The study included 179 patients; 50% had an underlying malignancy. There were no significant differences in pericardial fluid protein and lactate dehydrogenase between the 2 groups. Diagnostic yield from pericardial fluid analysis was greater in the malignant group (32% vs 11%, p = 0.002); 72% of newly diagnosed malignancies had positive fluid cytology. The 1-year survival was 86% and 33% in nonmalignant and malignant groups, respectively (p <0.001). Of 17 patients who died within the nonmalignant group, idiopathic effusions were the largest group (n = 6). In malignancy, lower pericardial fluid protein and higher serum C-reactive protein were associated with increased risk of mortality. In conclusion, pericardial fluid biochemistry has limited value in determining the etiology of pericardial effusions; fluid cytology is the most important diagnostic test. Mortality in malignant pericardial effusions may be associated with lower pericardial fluid protein levels and a higher serum C-reactive protein. Nonmalignant pericardial effusions do not have a benign prognosis and close follow-up is required. In this study, we aimed to examine the diagnostic yield of pericardial fluid biochemistry and cytology and their prognostic significance in patients with percutaneously drained pericardial effusions, with and without malignancy. This is a single-center, retrospective study of patients who underwent pericardiocentesis between 2010 and 2020. Data were extracted from electronic patient records, including procedural information, underlying diagnosis, and laboratory results. Patients were grouped into those with and without underlying malignancy. A Cox proportional hazards model was used to analyze the association of variables with mortality. The study included 179 patients; 50% had an underlying malignancy. There were no significant differences in pericardial fluid protein and lactate dehydrogenase between the 2 groups. Diagnostic yield from pericardial fluid analysis was greater in the malignant group (32% vs 11%, p = 0.002); 72% of newly diagnosed malignancies had positive fluid cytology. The 1-year survival was 86% and 33% in nonmalignant and malignant groups, respectively (p <0.001). Of 17 patients who died within the nonmalignant group, idiopathic effusions were the largest group (n = 6). In malignancy, lower pericardial fluid protein and higher serum C-reactive protein were associated with increased risk of mortality. In conclusion, pericardial fluid biochemistry has limited value in determining the etiology of pericardial effusions; fluid cytology is the most important diagnostic test. Mortality in malignant pericardial effusions may be associated with lower pericardial fluid protein levels and a higher serum C-reactive protein. Nonmalignant pericardial effusions do not have a benign prognosis and close follow-up is required.

The Prognostic Impact of Pericardial Fluid Cytology in Malignant Pericardial Effusion.

Malignant pericardial effusion may affect almost 15 of the patients with underlying malignancies which deteriorates the prognosis. The prognostic significance of pericardial fluid cytology is under-represented in previous studies. A total of 73 patients with symptomatic pericardial effusion treated with pericardiocentesis were included in this retrospective analysis. Macroscopic appearance, biochemical features, and cytological findings were obtained. Patients were divided into 3 groups: (i) without malignancy, (ii) with malignancy and negative cytology, and (iii) with malignancy and positive cytology. Survival data were searched via governmental death notification system. Mean age of the study group was 62 ± 15, and 54% (40) of the patients were female. On the cytological evaluation, 17 patients (23.3%) revealed positive cancer cytology, whereas 56 patients (76.7%) revealed negative cancer cytology. The median follow-up period was 840 days, and 34 patients (46.5%) died during follow-up. The survival rate of Group 3 was found to be significantly worse compared to Groups 1 and 2, no statistical difference was found between Groups 1 and 2 in terms of survival (Group 1 vs. Group 2 P =.078; Group 1 vs. Group 3 P <.001; Group 2 vs. Group 3 P =.041). Cytological evaluation is an important step in patients with malignant pericardial effusion. Positive pericardial fluid cytology indicates a poorer prognosis.

Best management of patients with malignant pericardial effusion: a comparative study between imaging-guided pericardiocentesis and surgical pericardial window

Best management of patients with malignant pericardial effusion: a comparative study between imaging-guided pericardiocentesis and surgical pericardial window

Development and validation a simple scoring system to identify malignant pericardial effusion.

Malignant pericardial effusion (MPE) is a serious complication in patients with advanced malignant tumors, which indicates a poor prognosis. However, its clinical manifestations lack specificity, making it challenging to distinguish MPE from benign pericardial effusion (BPE). The aim of this study was to develop and validate a scoring system based on a nomogram to discriminate MPE from BPE through easy-to-obtain clinical parameters. In this study, the patients with pericardial effusion who underwent diagnostic pericardiocentesis in Taizhou Hospital of Zhejiang Province from February 2013 to December 2021 were retrospectively analyzed. The eligible patients were divided into a training group (n = 161) and a validation group (n = 66) according to the admission time. The nomogram model was established using the meaningful indicators screened by the least absolute shrinkage and selection operator (LASSO) and multivariate logistic regression. Then, a new scoring system was constructed based on this nomogram model. The new scoring system included loss of weight (3 points), no fever (4 points), mediastinal lymph node enlargement (2 points), pleural effusion (6 points), effusion adenosine deaminase (ADA≦18U/L) (5 points), effusion lactate dehydrogenase (LDH>1033U/L) (7 points), and effusion carcinoembryonic antigen (CEA>4.9g/mL) (10 points). With the optimal cut-off value was 16 points, the area under the curve (AUC), specificity, sensitivity, positive predictive value (PPV), negative predictive value (NPV), positive likelihood ratio (PLR), negative likelihood ratio (NLR) for identifying MPE were 0.974, 95.1%, 91.0%, 85.6%, 96.8%, 10.56 and 0.05, respectively, in the training set and 0.950, 83.3%, 95.2%, 90.9%, 90.9%, 17.50, and 0.18, respectively, in the validation set. The scoring system also showed good diagnostic accuracy in differentiating MPE caused by lung cancer from tuberculous pericardial effusion (TPE) and MPE including atypical cell from BPE. The new scoring system based on seven easily available variables has good diagnostic value in distinguishing MPE from BPE.

Efficacy of Intrapleural or Intrapericardial Injection of Single Bevacizumab in the Treatment of Lung Cancer-Mediated Malignant Effusion.

The usage of bevacizumab for malignant pleural effusion (MPE) or malignant pericardial effusion (MPCE) has attracted increasing interest from researchers, but the precise ways of bevacizumab administration remain unknown. Patients with histologically or cytologically confirmed non-small-cell lung cancer (NSCLC) with MPE or MPCE were enrolled in the study and treated with a low dose of single bevacizumab (100 mg) intrapleurally or intrapericardially injected after the drainage of the effusions. The Lung Cancer Symptom Scale (LCSS), efficacy, and safety of drug administration were used as evaluation parameters in this study. The results indicated that lung cancer-related symptoms were significantly improved following treatment, compared with symptoms before the treatment (LCSS, score 494 ± 78 vs. score 377 ± 77, mean ± SD) (P < 0.001). Malignant effusions were well controlled, and the median time to progression (TTP) was 91 days and 111 days in MPE and MPCE, respectively. In addition, no severe side effects were observed, except in one patient with mild dizziness. In summary, the low dose of single bevacizumab (100 mg) with intrapleural or intrapericardial injection is effective and safe in the treatment of lung cancer-mediated malignant effusion, rapidly improving the malignant effusion-related symptoms and quality of life in patients with NSCLC.

Osimertinib and Bevacizumab Cotreatment for Untreated EGFR-Mutated NSCLC With Malignant Pleural or Pericardial Effusion (SPIRAL II): A Single-Arm, Open-Label, Phase 2 Clinical Trial

IntroductionFirst-line treatment of EGFR-mutated NSCLC with erlotinib plus antiangiogenic inhibitor exhibits promising results. However, the efficacy of this combination has not been fully investigated. Therefore, we evaluated the efficacy and safety of osimertinib plus bevacizumab in patients with EGFR-mutated NSCLC complicated with malignant pleural or pericardial effusion (MPE) for whom combination therapy may be particularly effective. MethodsThis single-arm, open-label, phase 2 study aimed to investigate the clinical benefits of the bevacizumab (15 mg/kg) and osimertinib (80 mg) combination in the first-line setting for advanced EGFR-mutated NSCLC with MPE. The primary end point of this study was 1-year progression-free survival (PFS). The secondary end points were objective response rate, PFS, overall survival, drainage-free survival without the need for thoracic or pericardial drainage, and safety. ResultsBetween January 2019 and August 2020, a total of 31 patients with EGFR-mutated NSCLC were enrolled from Japan in the study. The median PFS was 8.5 months (95% confidence interval [CI]: 5.3–11.3), the 1-year PFS was 32.1% (80% CI: 21.4–43.3), and the objective response rate was 74.2% (95% CI: 56.8–86.3). The median overall survival was not reached. The median drainage-free survival was 18.4 months (95% CI: 10.3–not estimable). Anorexia was the most common grade 3 or higher adverse event (four patients, 12.9%), followed by fatigue and dyspnea (three patients, 9.7%). No treatment-related deaths were recorded. ConclusionsOsimertinib and bevacizumab combination in patients with advanced EGFR-mutated NSCLC with MPE were safe but did not effectively increase PFS when compared with the inferred value from previous literature.

Clinical outcome of patients with severe malignant pericardial effusion due to neoplastic disease undergoing percutaneous balloon pericardiotomy during COVID-19 pandemic

Abstract Background Neoplastic pericardial effusion (NPE) is a serious complication that occurs in the setting of advanced oncological disease and is associated with a high recurrence rate. Currently, pericardiocentesis (PCT) remains the first therapeutic option and the use of percutaneous balloon pericardiotomy (PBP) is limited to the treatment of recurrences. However, it is not known whether some aspects of the procedure during PBP lead to different outcomes in terms of survival and recurrence, and no such patients have been included in studies during COVID-19 pandemic. Purpose The aim is to analyses the success, complications and recurrence rate (defined as recurrence of NPE requiring PCT, PBP or surgical pericardial window (SPW) of both procedures (BP) in order to establish the optimal entry treatment for these patients. Methods This research analyzed the clinical characteristics and prognostic factors of patients with severe pericardial effusion of neoplastic etiology who underwent PBP during the COVID-19 pandemic. A prospective study was conducted involving 23 patients admitted between January 2020 and January 2022 for severe NPE who underwent PCT or PBP as initial treatment of NPE. Results We included 23 patients, 62.9% were male with a mean age of 51.2±14.9 years NPE was the first manifestation of the oncological process in 12 patients (52.1%) with lung cancer being the most frequently associated primary cancer (58.7%) followed by breast cancer in 12.7% of cases. A total of 26 procedures were performed, 10 PCT, 15 PBP, 1 SPW, with tumors cells identified in the pericardial fluid in 13.0% of cases. PCT was used as an entry point in 10 patients (43.5%), 6 patients were COVID-19 positive and PCT was performed as the first treatment. While PBP was chosen as the first therapeutic option in 13 patients (56.5%) (2 Re-PBP). The initial efficacy of the procedure was 93.1% and 92.2% respectively (p=0.88), with 1 complication occurring in the PBP group but not requiring scheduled SPW. In the former group, the percentage of recurrences was higher (34.7%; 8 recurrences in 10 patients) compared to patients treated with upfront PBP (8.6%; 2 recurrences in 13 patients), p=0.09. In addition, only one patient had to resort to surgery. When analyses according to the BP. used, the recurrence rate was 4.0 times higher for PCT (34.7 vs. 8.6% recurrences), although without reaching statistical significance (p=0.16). Conclusions The PBP is a simple, safe and effective technique for the treatment of NPE during the COVID-19 pandemic, in our series it was associated with a lower recurrence rate. Therefore, it could replace PCT in these patients during the COVID-19 pandemic as optimal first line treatment, providing better quality of life and reducing the need for re-interventions. Funding Acknowledgement Type of funding sources: None.

PRIMARY LUNG ADENOCARCINOMA PRESENTING AS CARDIAC TAMPONADE

PRIMARY LUNG ADENOCARCINOMA PRESENTING AS CARDIAC TAMPONADE

SQUAMOUS CELL CARCINOMA OF THE LUNG LEADING TO MALIGNANT CARDIAC TAMPONADE DUE TO LARGE CARDIAC METASTASES

SQUAMOUS CELL CARCINOMA OF THE LUNG LEADING TO MALIGNANT CARDIAC TAMPONADE DUE TO LARGE CARDIAC METASTASES

S1961 Isolated Cardiac Metastasis as an Initial Presentation of Colorectal Cancer in a Young Male Due to Lymphatic Spread

Introduction: Malignant pericardial effusion is common, reported in 5–15% of cancer patients. It most commonly arises from metastasis of lymphomas and tumors of the lung, breast, and, infrequently, the gastrointestinal tract. We report a rare case of metastatic colon cancer without the direct involvement of other solid organs suggesting a lymphatic spread. Case Description/Methods: A 28-year-old man presented with one day of sudden onset of shortness of breath at rest. Vitals were significant for tachycardia. On examination, the lungs were clear to auscultation with distant heart sounds; the abdomen was soft without tenderness. The clinical presentation was suggestive of pericardial effusion. Laboratory studies revealed microcytic anemia with hemoglobin of 11.7 g/dl. CT angiography chest with contrast revealed moderate to large PEff and subsegmental pulmonary embolism. An ECHO showed large PEff, without any signs of tamponade. He underwent video-assisted thoracoscopic surgery for PEff with a pericardial window. The mediastinal lymph node biopsy and pericardial fluid cytology showed metastatic adenocarcinoma cells. A CT scan of the chest/abdomen/pelvis was performed to find the primary malignancy, which revealed a segmental thickening of the proximal ascending colon and ileum with proximal cecal distension, lymphadenopathy, without liver metastasis. A CF showed a large polypoidal mass in the ascending colon, and biopsy revealed poorly differentiated adenocarcinoma in ascending colon. He was started on palliative chemotherapy with capecitabine, oxaliplatin, and bevacizumab and was discharged with outpatient oncology follow-up (Figure). Discussion: Colorectal cancer (CRC) is the third most common cancer in the United States. It primarily spreads hematogenous via the portal venous system that drains the colon and proximal rectum to the liver and the lungs to the heart. However, cardiac metastasis is rare. In our patient, we assume lymphatic spread of colon cancer due to isolated pericardial involvement in the absence of solid organ involvement. To our knowledge, this is the second reported case of lymphatic spread of colon cancer. Therefore, we emphasize considering pericardial effusions as a marker of occult malignancy to facilitate rapid diagnosis and prompt treatment. However, the prognosis for carcinomatous pericarditis is poor, with a 2-5 months median survival.Figure 1.: A-Echocardiogram: Parasternal short axis view showing large pericardial effusion, no signs of cardiac tamponade. B-Colonoscopy showing a lobulated mass in cecum. C-Computed Tomography (C.T.) scan with PO/IV contrast showing mass vs segmental inflammation in proximal ascending colon (pink arrow). Mild thickening of terminal ileum (white arrow).