After initial clinical staging for Hodgkin lymphoma (HL), patients with obvious stage III or IV disease, bulky disease (defined as a 10 cm mass or mediastinal disease with a transverse diameter exceeding 33% of the transthoracic diameter), or the presence of B symptoms will require combination chemotherapy with or without additional radiation therapy.
After a gastrointestinal stromal tumor has been diagnosed, tests are done to find out if cancer cells have spread within the gastrointestinal tract or to other parts of the body.
The process used to find out if cancer has spread within the gastrointestinal (GI) tract or to other parts of the body is called staging. The information gathered from the staging process determines the stage of the disease. The following tests and procedures may be used in the staging process:
Patients with nonbulky stage IA or IIA disease are considered to have clinical early-stage disease. These patients are candidates for chemotherapy, combined modality therapy, or radiation therapy alone. Staging laparotomy is no longer recommended because it may not alter management and does not enhance ultimate outcome. When chemotherapy alone or combined modality therapy is applied, laparotomy is not required.
In adult HL, the appropriate dose of radiation alone is 25 Gy to 30 Gy to clinically uninvolved sites and 35 Gy to 44 Gy to regions of initial nodal involvement.[3,4,5,6] These recommendations are often modified in pediatric or advanced-staged adult patients who also receive chemotherapy. Treatment is usually delivered to the neck, chest, and axilla (mantle field) and then to an abdominal field to treat para-aortic nodes and the spleen (splenic pedicle). In some patients, pelvic nodes are treated with a third field. The three fields constitute total nodal radiation therapy. In some cases, the pelvic and para-aortic nodes are treated in a single field called an inverted Y. In patients with a favorable prognosis, treatment of the pelvic lymph nodes is frequently omitted, since fertility can be preserved without affecting relapse-free survival. (Refer to the PDQ summary on Sexuality and Reproductive Issues for more information on fertility.)
Acute nonlymphocytic leukemia may occur in patients treated with combined modality therapy or with combination chemotherapy alone.[7,8,9] At 10 years following therapy with regimens containing MOPP, the risk of acute myelogenous leukemia (AML) is approximately 3%, with the peak incidence occurring 5 to 9 years after therapy. The risk of acute leukemia at 10 years following therapy with ABVD appears to be less than 1%. A population-based study of more than 35,000 survivors during a 30-year time span identified 217 patients who developed AML; the excess absolute risk is significantly higher (9.9 vs. 4.2 after 1984, P < .001) for older patients (i.e., >35 years at diagnosis) versus younger survivors.