Optional medical device diagnostics – depending on the results of the history, physical examination, laboratory diagnostics, and obligatory medical device diagnostics – for differential diagnosis.
- Abdominal ultrasonography (ultrasound examination of the abdominal organs) – for basic diagnostics.
- Endosonography (endoscopic ultrasound (EUS); ultrasound examination performed from the inside, i.e., the ultrasound probe is brought into direct contact with the internal surface (for example, the mucosa of the stomach/intestine) by means of an endoscope (optical instrument)). – When mitral stenosis is suspected (heart valve defect in which the opening of the mitral valve is narrowed; mitral valve connects the left atrium with the left ventricle).
- Magnetic resonance imaging (MRI; computer-assisted cross-sectional imaging (using magnetic fields, that is, without X-rays)) – to detect the primary tumor.
- Computed tomography (CT; sectional imaging procedure (X-ray images from different directions with computer-based evaluation)) – to detect the primary tumor.
- Somatostatin receptor scintigraphy – to detect the primary tumor.
- Angiography (imaging of blood vessels by contrast medium in an X-ray examination) – to detect the primary tumor.
- Bronchoscopy (pulmonary endoscopy) – for suspected lung involvement.
- Encephalogram (EEG; recording of the electrical activity of the brain) – if epilepsy is suspected.
