Definition of CATEGORICAL IMPERATIVE. : a moral obligation or command that is unconditionally and universally binding.ADVERTISEMENT.efinition of CATEGORICAL IMPERATIVE. : a moral obligation or command that is unconditionally and universally binding. ADVERTISEMENT.
A lung nodule is a mass of tissue located in the lungs. Though about 40% of these growths are benign, they can be cancerous, especially in older people and smokers. Many people with this condition don't have any symptoms, though some do have wheezing, shortness of breath, or a persistent cough.edical professionals can examine chest X-rays for indications of lung nodules. Smokers are at a serious risk of developing lung nodules. A lung nodule is a mass of tissue located in the lungs. Cancerous lung nodules may be removed through a surgical procedure.
Types of Lung Nodules. A lung nodule may be due to a number of causes and are not always cancerous. Benign tumors or granulomas are other fairly common causes of a lung nodule. 1  A malignant tumor, or cancer, is when the genes of the cells becomes damaged and the abnormal cells grow uncontrollably.