Development of thyroid nodule during pregnancy is rare, however the cancer rate of this nodule is high. Herein, we present medicaloutcomes of three pregnant women who were operated with the diagnosis of differentiated thyroid carcinoma in the light of literature. Assonographic findings of three cases showed malignant characteristics, fine needle aspiration biopsy (FNAB) was performed. Cytologicalexamination result was reported as papillary thyroid carcinoma (PTC). Surgery was performed in the second trimester in all cases. Onecase underwent total thyroidectomy with neck dissection at level III and VI and two cases underwent total thyroidectomy with neckdissection at level VI. Pathological examination result was also reported as PTC. Lymph node metastases in the dissected materials weredetected. During the intraoperative and early postoperative period, no complications occurred and no findings of recurrence or residueswere observed during one-year follow-up following surgery. In conclusion, as the first trimester has an increased risk of congenitalmalformations, elective surgery should be performed at the second trimester, if applicable. In pregnants with malignant sonographicfeatures and PTC confirmed by FNAB, surgery can be applied safely by taking precautions during pre-/peri- and postoperative period.These patients should not be given premedication for anesthesia, should be properly positioned and teratogenic agents should beavoided. After surgery, mother and fetus should be monitored closely.