[PDF] bac biologie cancer

Is Bac a type of adenocarcinoma?

To summarize, BAC is a unique subtype of lung cancer that accounts for about 2-4% of non-small cell lung cancer cases, but it's a component in about 15-20% of patients, in combination with invasive adenocarcinoma. Under the microscope, the pure form is noninvasive and spreads thinly over the walls of air sacs, interrupting gas exchange.

What is bronchioloalveolar carcinoma (BAC)?

Last Update: April 22, 2022. Bronchioloalveolar carcinoma (BAC) is a variant of non-small cell lung cancer (NSCLC) that, in recent years, has received a new identity and nomenclature from the histology perspective. The orphan among lung cancers has found a family, albeit with some newfound stepbrothers and sisters.

Is Bac a symptom of lung cancer?

Since BAC tends to spread within the lungs more often than to distant regions, symptoms related to the spread of lung cancer (such as headaches due to brain metastases) are less common. BAC diagnosis is also similar to the diagnosis of other lung cancers, with a few exceptions.

How long does a BAC tumor last?

More than any other type of lung cancer, BAC can be so slow that it doesn't clearly need any treatment for years, growing at a barely perceptible rate from one year to the next. Other BAC tumors can progress rapidly and lead to declines in a patient's lung capacity and activity level over a matter of just weeks.