# Medical Treatment Unit, Outpatient Clinic C3-C5, Comprehensive Cancer Center Keywords: - [Comprehensive Cancer Center](< /en/search?q=Comprehensive Cancer Center >) - [cancer treatment](< /en/search?q=cancer treatment >) At the Medical Treatment Unit in Comprehensive Cancer Center, we administer medication for cancer. You will receive an invitation to arrive at our clinic and for treatment on the basis of a referral. Before starting your treatment, you will usually visit the laboratory and have the required medical imaging examinations, as well as have a physician's appointment. Your actual treatment plan will be devised during an appointment with one of the clinic's physicians. In sudden emergency matters, please contact the on-call hospital in your area. ## [ Maisa Portal (opens in new window, links to another website) ](https://www.maisa.fi/maisa/Authentication/Login?lang=britishenglish) maisa.fi You can use our online services by signing in to the Maisa Portal. Once your treatment with us begins, you will receive information on the services you can access in Maisa. These include appointment booking and preliminary information forms, for example. Click here to go to Maisa's sign-in page  ## [ Care pathways for cancer ](/en/patient/treatments-and-examinations/cancer) The care pathways provide information about different cancers, diagnostic studies related to the disease, and the different stages of treatment at HUS. Read more about the care pathways for cancer  ## [ Patient Guide ](/en/patient/patient-guide) The Patient Guide site answers the most common questions patients may have before, during, and after treatment. See Patient Guide site here  ## Yhteystiedot ja aukioloajat #### Visiting address Comprehensive Cancer Center Haartmaninkatu 4 Helsinki floors 3-5 #### Postal address P.O. Box 180 00029 HUS ### The contact center of the Comprehensive Cancer Center The operators will connect your call to the right professional either as a direct call or as a callback request. [ Phone, The contact center of the Comprehensive Cancer Center: 09 471 74900 ]()telephone hours: Mon–Fri 7:30–16:00 ### Medical Helpline [ Phone, Medical Helpline: 116 117 ]() ## Find us here ### [ Comprehensive Cancer Center ](/en/patient/hospitals-and-other-units/comprehensive-cancer-center)  ## Unit's services ### [ Cancer treatment ](/en/patient/treatments-and-examinations/cancer-treatment)  ### [ Support during cancer treatment ](/en/patient/treatments-and-examinations/support-during-cancer-treatment)  ### [ Support for young adults with cancer ](/en/patient/treatments-and-examinations/support-young-adults-cancer)  ## Further information on this topic ### [ Instructions and additional information for cancer patients ](/en/patient/treatments-and-examinations/cancer/instructions-and-additional-information-cancer-patients) On this page you will find instructions, guides and useful links to support your cancer treatment. Updated: 10.09.2025 Print this page