( CNN ) -- A 13-year-old Minnesota boy who has cancer has resumed chemotherapy treatments and is not responding well , a family spokesman said Friday . Doctors say Daniel Hauser 's lymphoma responded well to a first round of chemotherapy in February . Danny Hauser started a second round of chemotherapy treatment this week , Jim Navarro said in a statement on the family 's Web site , dannyhauser.com . `` The doctor changed the number of chemotherapy drugs in the protocol submitted to the court . Danny is not tolerating the drugs well and has been vomiting all day . He is understandably angry and depressed about being forced to go through the ravages of chemotherapy again . '' Daniel underwent his first round of chemotherapy in February , a month after he was diagnosed with Hodgkin 's lymphoma . But his parents were concerned about the treatment 's side effects , which typically include nausea , and decided to end the chemotherapy regimen and pursue holistic treatments instead . When Daniel 's oncologist learned of the decision to reject standard treatment , which doctors say is associated with a cure rate of as high as 90 percent , he asked a court to intervene to ensure the teen got chemotherapy . Doctors say that , without it , the disease would likely prove fatal . But last week , before the court could act , Colleen Hauser packed up her son and flew with him to Southern California , from where they were planning to continue to Mexico to seek alternative alternative medical treatment . She said he would have run on his own had she not helped him flee . She changed her mind before crossing the border and returned this week with Daniel to Minnesota , where the family agreed to comply with whatever treatment the court ordered . A medical examination revealed that the boy 's tumor had grown since he was diagnosed and the boy 's doctor recommended he resume chemotherapy . After examining the boy on Monday , Dr. Michael Richards estimated the tumor 's size at 5.3 inches by 5.1 inches by 6.3 inches , and said it was `` protruding outside the chest wall . '' He said initiation this week of standard chemotherapy treatment was `` imperative . '' Richards recommended at least another five cycles of chemotherapy followed by radiation , and added that the `` goal will be to include alternative therapies in which the family is interested , as long as there is not data to suggest that a particular danger exists with any alternative medicine . '' District Court Judge John Rodenberg originally took custody of the boy away from his parents , but returned him to his family on the condition that they comply with the recommendations of the cancer specialist . Hodgkin 's lymphoma is a cancer that affects the lymphatic system , which is part of the immune system . As the disease progresses , it compromises a body 's ability to fight infection . CNN 's Aaron Cooper contributed to this story .
Daniel Hauser started second round of treatment this week , spokesman says . Daniel ` ` angry and depressed '' at being forced to undergo chemo , ' Navarro says . Year - old started chemotherapy , physician and court say . Mother took him out of the house to seek alternative treatment , earlier this week .