Inclusion Criteria:

- Patients should have reached a minimum age of 18 years at the time of enrolment

- Newly detected histologically confirmed diagnosis of a solid (lung,
gastro-intestinal, GIST, urological, prostate, breast, sarcoma or gynecological
cancer) or hematologic malignancy

- Patients should receive a treatment with curative intent based on the investigator's
judgment or have an expected median overall survival of at least 5 years

- Patients scheduled to receive (adjuvant) radiotherapy, chemotherapy, radiobiotherapy,
radiochemotherapy, anti-hormonal or targeted therapy with curative intent

- Patients should be able to adequately communicate in Dutch

- Patients should present with a sufficient mental and physical functional status
(according to investigator's judgment and first baseline assessment) for completing
the questionnaires and neuropsychological assessment

Exclusion Criteria:

- Patients younger than 18 at the time of enrollment

- Patients who present with a cognitive impairment (based on the baseline assessment)

- Patient receiving a treatment with palliative intent

- Patients who had surgery in the month preceding the baseline assessment

- Patients who are scheduled to receive surgery in the first five months after the
baseline assessment

- Patients diagnosed with primary or secondary brain tumors

- Patients with a prior history of cancer, with or without chemotherapy or radiotherapy

- Patients suffering from organic brain disease

- Patients with an untreated or unstable major medical condition

- Patients who are alcohol or drug dependent

- Patients showing signs of mental deterioration

- Patients with dementia (DSM-IV criteria)

- Patients with a major psychiatric or neurologic disorder that could potentially
invalidate assessment; a prior or current diagnosis of a depressive or anxiety
disorder is allowed

- Patients presenting with a condition other than cancer in which fatigue is a
prominent symptom (such as chronic fatigue symptom)