These symptoms related to lung cancer are not fully understood.

Some neoplasms have the ability to secrete hormones or other proteins.

Symptoms may be related to endocrine disorders endocrine disorders

This can occur in up to 20% of lung cancers

Importantly this can cause changes in emotions, physical nature, or other aspects of the person

It does not necessarily mean that metastases have occurred.

It differs from having a neoplasm in the affected area that these hormones are typically released.

Some examples would be:
·       Inappropriate antidiuretic hormone
·       Abnormal increase of calcium
·       ACTHor Adrenocorticotropic hormone