Which of the following is NOT included in the ROS systems?

The Review of Systems (ROS) is a systematic approach used in patient evaluations that focuses on various bodily systems to identify symptoms that the patient may be experiencing. Each system is designed to capture specific aspects of a patient's health and history.

The constitutional system addresses general health characteristics such as weight loss or fever. The psychiatric system evaluates mental health conditions including mood disorders or anxiety. The neurological system explores issues related to the nervous system, such as headaches or seizures.

In contrast, the immunogenic system is not typically recognized as a standalone system in the ROS. While components related to immunology, such as allergies or infections, might be encompassed within other systems (like constitutional or review of specific organ systems), there isn't a designated "immunogenic" section within the standard ROS. Therefore, the correct answer highlights that this option does not fit within the conventional categories of Review of Systems, making it distinct from the others listed.