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Introduction. Thyroid cancer is one of the most common malignant neoplasms of the endocrine system. well-differentiated thyroid cancer constitutes about 90 % of all malignant tumors of the thyroid gland. Despite growing morbidity and high incidence of this pathology, in case of timely diagnosis and treatment well-differentiated thyroid cancer has favorable prognosis.Aim. using clinical examples, to demonstrate the possibility of thyroglobulin measurement in needle washouts of fineneedle aspiration biopsy in the detection of cervical metastases of highly differentiated thyroid cancer.Materials and methods. five patients (2 patients with combined oncological pathology, 2 patients with nodes in the thyroid gland, 1 patient after a thyroidectomy) with cervical adenopathy measured the level of thyroglobulin in the wash out fluid of lymph-nodes biopsy using the immunoradiometric method using the commercial kits of the Institute of Isotopes-IRmA (Hungary).Results. Cervical metastases of highly differentiated thyroid cancer were detected or excluded by the determination of fine-needle aspiration biopsy in patients with non-informational cytological studies. The determination of fineneedle aspiration biopsy is a useful diagnostic method in the differential diagnosis of cervical metastases in patients who have other morphological forms of cancer in addition to well-differentiated thyroid cancer, as well as for the differential diagnosis of cervical adenopathy in patients with a history of highly differentiated thyroid cancer.Conclusion. Determination of thyroglobulin level in puncture needle washout is a simple and useful diagnostic method for differential diagnosis of metastases in lymph nodes of the neck in patients with several morphological forms of malignant tumors.

Introduction. Lymphomas are a heterogenic group of tumors of the lymphatic and hematopoietic systems, and in many cases tumor process develops in the area of the head and neck including skin and mucosa, orbit, nasal cavity and paranasal sinuses, oral cavity, oropharynx, salivary glands, thyroid, and cervical lymph nodes. Differential diagnosis of lymphomas of the head and neck is complicated because it can be accompanied by another non-tumor pathology. High heterogeneity of lymphomas of the head and neck requires structurization of knowledge on their epidemiological and clinical manifestations.The study objective is to optimize early diagnosis as it allows to significantly increase cancer alertness in local practitioners, oncologists, diagnosis specialists and, in turn, to decrease verification frequency in generalized disease processes. Study of clinical characteristics of lymphoproliferative disorders of the head and neck leads to increased quality of differential diagnosis.Materials and methods. A study of lymphoproliferative disorders affecting head and neck was performed. Study material consisted of data on 174 patients hospitalized at the N.N. Blokhin National medical Research Center of Oncology between 1999 and 2020.Results. Based on the current clinical and morphological classification of lymphoproliferative disorders, data on location of lesions, characteristic signs of extranodal lesions and cervical lymph nodes involvement, as well as methods of diagnosis of lymphomas of the head and neck, are presented.Conclusion. The obtained data helps solve problems of diagnosis of lymphoproliferative disorders affecting the head and neck and serve as a basis for successful, predictable treatment of lymphomas.

A review of accumulated international clinical experience and prognostic significance calculations of metastatic involvement of the lingual lymph nodes is given. Anatomical terminology of lingual lymph nodes and its contradictive aspects are discussed. It is shown that metastatic lesions of the lingual lymph nodes posses high prognostic value, therein a topographic anatomic classification of the lingual lymph nodes is needed to increase the efficiency of diagnosis and augmenting of the oncologic treatment results. This classification should be unified to avoid misunderstanding between researchers.