Clinical case of mucinous invasive adenocarcinoma of the lung in an adolescent

Mucinous (mucus-producing) adenocarcinoma, also known as glandular lung cancer, is a malignant tumor that develops from the glandular epithelium of the bronchial wall. It is extremely rare in young individuals, virtually undetected before the age of 20. Due to the nonspecific symptoms of this pathology, there is often an extended diagnostic period, which in turn delays the initiation of treatment and significantly impacts the disease prognosis. This article describes a clinical case of a newly diagnosed mucinous invasive adenocarcinoma of the left lung in a 17-year-old female patient.