[Errors and difficulties in the x-ray diagnosis of osteogenic sarcoma of the long tubular bones].

In some cases radiodiagnosis of osteogenic sarcoma is associated with some difficulties resulting from a variety of its x-ray picture. The main factor that influences the x-ray manifestations of osteogenic sarcoma, is a neoplastic bone formation which reflects the morphological essence of this tumor. Other signs depend on a tumor site in one or another anatomical part of the tubular bone, on rates and type ot tumor growth.

[X-ray and scintigraphic diagnosis of thyroid cancer metastatic to bone].

Comparative analysis of the results of radio- and scintigraphic investigation of 101 patients with thyroid cancer (TC) metastases to the bones has shown the appropriateness of combined diagnosis at all stages of patients' examination. The use of osteoscintigraphy with 99mTc-phosphates with subsequent x-ray investigation and whole-body scintigraphy with 131I contributes to early and more complete diagnosis of TC skeletal metastases. Iodine accumulation in TC bone metastases depends on the morphological structure of a tumor, the presence of functioning thyroid tissue and the level of iodine in the patient's body at the time of examination.

[Dynamics of the x-ray picture of bone metastases of thyroid cancer as affected by radiotherapy].

Teletherapy or radiotherapy combined with 131I for thyroid cancer metastases to the bones caused the development of bone reparation in 70%, in 17% the picture remained unchanged; signs of further tumor growth were observed in 13%. An early x-ray sign of therapeutic efficacy was the decreased soft tissue component of a metastatic tumor 3-5 mos after the initiation of therapy. Disease stabilization was observed in 2.

[The therapeutic procedure at the 1st stage of the combined therapy of patients with small-cell ling cancer].

General principles of management of localized small-cell lung cancer were developed using the experience of treatment of 300 cases of the disease. Tumor extent should be assessed according to the TNM classification. The effectiveness of surgery + radiation as a first component of complex treatment was evaluated in a randomized study which included 71 patients.

Preoperative radiotherapy in the combined treatment of lung cancer patients.

The results of a cooperative study on combined treatment and preoperative radiotherapy in 478 lung cancer patients were analyzed. Intensive fractionated radiotherapy was given at doses of 4 Gy for 5 days, the total dosage thus attaining 20 Gy. 218 patients received combined treatment, 260 patients were treated only surgically.

[Combined treatment of thyroid cancer metastases to the lungs in children and young people].

Basing on a study of the results of therapy of 47 pediatric patients with thyroid cancer metastases to the lungs the authors worked out methods of hormono- and radiotherapy, specified indications for a volume of operations in locally spread primary tumor or regional metastases. The use of multimodality hormono- and radiotherapy of distant thyroid cancer metastases in children resulted in the 5-year survival rate of 90.9%.

[Role of radiation therapy in the treatment of patients with small cell lung cancer].

The paper presents a review of up-to-date literature on the problems of morphological heterogeneity of small cell lung cancer, clinico-morphological parallels, main prognostic factors and rationale for application of radiation therapy in the complex treatment of the disease. The authors also discuss their own findings on 208 cases, with 170 of them having localized tumor. Superfractionated irradiation of a locoregional zone with 1.

Results of radiotherapy and combined radiotherapy and chemotherapy of inoperable lung cancer.

In this study there is presented a comparative analysis of immediate results after radiotherapy and combined treatment (radio- and chemotherapy) in 174 patients with highly differentiated inoperable lung cancer. The data were provided by participants of a joint investigation in some CMEA member countries (Hungary, USSR, Czechoslovakia) during the period of 1976 to 1980. In the randomized study radiotherapy (a total dose of 60 Gy) was applied in 98 patients, radiotherapy with chemotherapy (methotrexate and 5-fluorouracil) was applied in 76 patients.

Three-year results of surgical and combined treatment of lung cancer with a preoperative radiotherapy.

In this paper the analysis of immediate results of clinical material is given which has been accumulated by participants of the joint investigation in some CMEA member countries (Project 3-9.1.1 of the Lung Cancer Program; Bulgaria, Hungary, Poland, USSR, Czechoslovakia) with the aim to study the effectiveness of one of the variants of combined treatment of patients with differentiated forms of lung cancer.