Evaluation of the Scientific Studies on Hemoptysis and Their Relationship with the COVID-19 Pandemic

Hemoptysis is defined as the expectoration through the mouth of blood originating from the parenchymal tissue of the lung or from the bronchial tree. It is commonly seen throughout the world. The etiology of hemoptysis, which is widely encountered worldwide, has varied according to geographical conditions and the period in which the studies were conducted; in the face of this situation, it is observed that different countries have from time to time contributed to the scientific world through collaboration. The purpose of the study is to examine and evaluate the studies on hemoptysis from various perspectives. A bibliometric and science mapping analysis was conducted using records retrieved from PubMed After applying eligibility criteria, 892 records published between 1845 and 2025 were included. Data were analyzed using the bibliometrix package in R. Hemoptysis-related publications increased over time. The most productive source was Chest, followed by Cureus and The Annals of Thoracic Surgery. The leading productive countries included China, India, Italy, Japan, and the United States, while the strongest international collaboration was observed between China and the United States. Thematic analyses showed that the literature mainly focused on diagnosis, etiology, imaging methods, treatment outcomes, and clinical management