Article
Study Points to Risk Factors for Lymphoma
Study data reveal a raised risk for non-Hodgkin lymphoma, based on environmental, genetic, and other lifestyle factors.
A “heightened index of suspicion” is called for when a patient with Hashimoto’s thyroiditis (HT) presents with an enlarging neck mass, say researchers from Tan Tock Seng Hospital, Singapore, in a case report. According to the researchers, because the complication of thyroid lymphoma is rare, physicians commonly forgotten it. But primary thyroid lymphomas (PTLs) have a 60-fold risk in patients with HT.
Related: Study Points to Risk Factors for Lymphoma
Hashimoto’s thyroiditis typically is treated successfully with thyroxine. The study patient, however, began to lose weight and developed a mass in her neck that was diagnosed as diffuse large B-cell lymphoma. Previously, research suggested that having HT for ≥ 20 years increased the risk of thyroid lymphoma, but small studies have found that the interval between diagnosis of HT and diagnosis of thyroid lymphoma might be shorter—4 to 9 years, the researchers note. They cite another study that found the median interval was 18 months, as with their patient. Symptoms usually last from a few days to 36 months before diagnosis; in the study patient, symptoms of compression occurred over 2 to 3 weeks.
That shorter time frame may indicate that ultrasonography surveillance should be started early and done periodically, the researchers say, to detect lymphoma development as soon as possible. Radiologic imaging is helpful but “only serves as an adjunct to the diagnosis.” Histologic diagnosis is still needed for definitive diagnosis.
Timely diagnosis and early treatment mean the prognosis can be good for PTL, with relatively high survival rates after chemotherapy and radiotherapy. In this case, the patient underwent 6 cycles of chemotherapy with adjuvant radiotherapy. She then was maintained on thyroxine 75 µg daily. She remains euthyroid and disease free 1 year after completing her cancer treatment.
Source:
Chiang B, Cheng S, Seow CJ. BMJ Case Rep. 2016;pii:bcr2016217568.
doi: 10.1136/bcr-2016-217568.