关键词: 乳腺肿瘤, 甲状腺肿瘤, 皮肌炎, 彩色多普勒超声

Abstract: Objective: To provide clinicians with insights about the patients with breast cancer complicated with thyroid cancer and dermatomyositis, and to improve early detection of the diseases by observing the clinical characteristics of 1 case of breast cancer complicated with thyroid cancer and dermatomyositis and reviewing the literatures about the relationships between these three kinds of diseases. Methods: The medical information of this patient, including gender, age, clinical manifestations, glucocorticoid treatment dose, type of concurrent tumor and the time point it occured and therapeutic regimen were collected and recorded. These clinical data were retrospectively analyzed. Results: The patient with dermatomyositis was diagnosed with breast cancer and thyroid cancer in succession. Oral administration of 50 mg dexamethasone per day was continued in the treatment of dermatomyositis. Then the patient received 4 cycles of pirarubicin/cyclophosphamide(AC) followed by 4 cycles of paclitaxel/Hessaitin (TH) as neoadjuvant chemotherapy for breast cancer. During the 24 weeks of chemotherapy,the breast tumor size was gradually decreased while there was no significant change in thyroid tumor size. The clinical symptoms of dermatomyositis were also improved. The blood lactic acid dehydrogenase and alpha hydroxybutyrate dehydrogenase levels were decreased, but not obviously. After 8 courses of AC-TH neoadjuvant chemotherapy followed by radical resection of thyroid cancer, there was no significant improvement in the symptoms of dermatomyositis 1 week after operation and the myocardial enzyme levels remained unchanged. Then modified radical mastectomy was performed. The myocardial enzymes were examined again 1 week after the second operation all of them were decreased to the normal levels.The clinical symptoms of dermatomyositis were also improved. Conclusion: Although the relationships between the three diseases is still controversial, the clinical data of the patient and relevant literatures collected in this paper support that breast cancer is associated with thyroid cancer and dermatomyositis is associated with breast cancer, but not thyroid cancer.

Key words: breast neoplasms, thyroid neoplasms, dermatomyositis, color Doppler ultrasound