T-cell lymphoblastic lymphoma infiltration into the thyroid gland: A rare case report

Lymphomas account for approximately 2% of all malignancies of the thyroid gland. Infiltration of T-cell lymphoblastic lymphoma (T-LBL) into the thyroid gland is rare. This case is presented on account of the rarity of T-LBL infiltration into the thyroid gland. A 22-year-old male, diagnosed case of T-LBL by left cervical lymph node biopsy and immunohistochemistry (IHC) and on chemotherapy, presented with a thyroid swelling after 6 months of diagnosis of T-LBL. Ultrasound imaging of the neck showed symmetrically enlarged thyroid gland. Fine needle aspiration cytology of the thyroid swelling showed infiltration of lymphoma cells into the thyroid gland, which was confirmed with IHC. T-LBL is a high-grade lymphoma which rarely infiltrates the thyroid gland. Intensive chemotherapy regimens and long-term maintenance therapy improve the prognosis of T-LBL.