[Primary thyroid lymphoma. Report of four cases].

Primary thyroid lymphoma is uncommon and usually of non-Hodgkin type. We report four female patients with thyroid lymphoma. An 81 year-old patient that was operated and received three cycles of chemotherapy and was lost from follow up.

[Histiocytic necrotizing lymphadenitis: report of three cases].

Histiocytic necrotizing lymphadenitis (HNL), also known as Kikuchi 5 disease is a rare condition of unknown etiology. Patients present with cervical lymph node enlargement, fever and malaise. The diagnosis is made by excision biopsy.

[Incidence of hypocalcemia after total thyroidectomy].

Background: Postoperative hypocalcemia is one of the most common complications of thyroid surgery. It is related to the type of disease (malignant or benign), the number of identified parathyroid glands during the surgical procedure, and the surgeon's experience. Total thyroidectomy is the procedure of choice in our hospital for benign and malignant thyroid disease, but it can increase the incidence of complications.