Pulmonary haemangiosarcoma with main pulmonary artery thrombosis imitating subacute pulmonary embolism with infarction

Understanding COVID-19-associated coagulopathy: From PIC to SIC or DIC

Coagulopathy, characterized by a high D-dimer level, is a common pathological occurrence in coronavirus disease 2019 (COVID-19) and is associated with poor prognosis. Severe cases with COVID-19 is associated with a significantly higher risk of deep vein thrombosis and acute pulmonary embolism. Pulmonary intravascular coagulopathy is the characteristic coagulopathy in COVID-19. Unlike sepsis-induced coagulopathy and disseminated intravascular coagulation, which are manifestations of systemic coagulopathy, pulmonary intravascular coagulopathy is a manifestation of a local coagulation disorder in the lung. The progression from pulmonary intravascular coagulopathy to sepsis-induced coagulopathy or disseminated intravascular coagulation in the context of COVID-19 may indicate that the patient's coagulation dysfunction has progressed from local to systemic. Exploring the associated coagulation disease will aid in the understanding of the pathophysiological mechanisms underlying severe COVID-19.

Characteristics of Acute Pulmonary Embolism in Patients With COVID-19 Associated Pneumonia From the City of Wuhan

The aim of this study was to describe clinical, imaging, and laboratory features of acute pulmonary embolism (APE) in patients with COVID-19 associated pneumonia. Patients with COVID-19 associated pneumonia who underwent a computed tomography pulmonary artery (CTPA) scan for suspected APE were retrospectively studied. Laboratory data and CTPA images were collected. Imaging characteristics were analyzed descriptively. Laboratory data were analyzed and compared between patients with and without APE. A series of 25 COVID-19 patients who underwent CTPA between January 2020 and February 2020 were enrolled. The median D-dimer level founded in these 25 patients was 6.06 μg/mL (interquartile range [IQR] 1.90-14.31 μg/mL). Ten (40%) patients with APE had a significantly higher level of D-dimer (median, 11.07 μg/mL; IQR, 7.12-21.66 vs median, 2.44 μg/mL; IQR, 1.68-8.34, respectively, P = .003), compared with the 15 (60%) patients without APE. No significant differences in other laboratory data were found between patients with and without APE. Among the 10 patients with APE, 6 (60%) had a bilateral pulmonary embolism, while 4 had a unilateral embolism. The thrombus-prone sites were the right lower lobe (70%), the left upper lobe (60%), both upper lobe (40%) and the right middle lobe (20%). The thrombus was partially or completely absorbed after anticoagulant therapy in 3 patients who underwent a follow-up CTPA. Patients with COVID-19 associated pneumonia have a risk of developing APE during the disease. When the D-dimer level abnormally increases in patients with COVID-19 pneumonia, CTPA should be performed to detect and assess the severity of APE.

Non-small-cell Carcinoma Localised within the Pulmonary Artery Misdiagnosed as Pulmonary Thromboembolism

In this case report we describe a 69-year-old male ex-smoker with non-small-cell carcinoma localised within the pulmonary artery, misdiagnosed as pulmonary thromboembolism. This case indicates that non-small-cell carcinoma can be localised within the pulmonary artery. Furthermore, it emphasises the importance of performing a positron emission tomography scan and diagnostic intraluminal biopsy in unexplained lesions in the pulmonary artery to reach the proper diagnosis at the early stages of the disease. The patient is currently undergoing concurrent chemotherapy and radiation therapy.

A Case of Angiosarcoma Arising in Trunk of the Right Pulmonary Artery Clinically Simulating Pulmonary Thromboembolism

Angiosarcoma arising in the pulmonary artery is extremely rare. We herein report a case of angiosarcoma arising in the pulmonary artery trunk of 71 year-old woman. This case was clinically diagnosed as pulmonary thromboembolism but angiosarcoma of the pulmonary artery should be considered as the differential diagnosis of unusual clinical manifestations of pulmonary thromboembolism because of the extremely poor prognosis of the lesion.

Lung adenocarcinoma with peculiar growth to the pulmonary artery and thrombus formation: report of a case

Background

Cases of pulmonary artery masses have only rarely been reported, and the optimal type of the diagnosis and treatment is controversial.

Case Presentation

An 81-year-old woman was found to have an abnormal shadow on chest X-ray film. Computed tomography showed an irregularly bordered tumor centered in the hilar region extending from segment 6 to the middle lobe of the right lung. Pulmonary angiography showed complete occlusion of the trunk at the periphery proximal to the bifurcation of the posterior ascending branch. Based on bronchoscopic biopsy of the tumor, an adenocarcinoma was diagnosed. Middle and lower lobectomy was performed. Histopathologically, the adenocarcinoma had invaded the tunica intima of the pulmonary artery and also replaced the endothelium in the same region. Although a large thrombus was found at the vessel invasion site of the adenocarcinoma in the pulmonary artery, there were no malignant findings in the thrombus itself.

Conclusions

This is the first reported case of radical resection of a lung cancer with invasion along the pulmonary artery wherein a benign thrombus had formed. In general, surgery would be the treatment of choice for a pulmonary artery mass.

Intimal sarcoma of the pulmonary artery: a differential diagnosis of chronic pulmonary thromboembolism

Intimal sarcoma of the pulmonary artery is a rare and potentially lethal tumor, the diagnosis of which is difficult and therefore frequently delayed. The clinical signs and symptoms are nonspecific, often mimicking chronic pulmonary thromboembolism (CPTE). We report the case of a 45-year-old male under treatment for CPTE associated with pulmonary arterial hypertension and chronic cor pulmonale. There was no response to treatment with anticoagulants and sildenafil. We emphasize the difficulties in diagnosing intimal sarcoma of the pulmonary artery, the need to investigate this neoplasm in the differential diagnosis of CPTE and the systematic use of criteria for the appropriate prescription of new medications for pulmonary artery hypertension.