Tenosynovial giant cell tumor.

Tenosynovial Giant Cell Tumor (TGCT) is a group of typically benign lesions arising from the synovium of joints, bursae and tendon sheaths. Depending on their growth pattern and clinical course, they are divided into localized and diffuse types. It is predominantly caused by a mutation in the stromal cells of the synovial membrane leading to overexpression of the colony stimulating factor 1 that recruits CSF1R-expressing cells of the mononuclear phagocyte lineage into the tumor mass. The lesions contain mainly histiocyte-like and synovial cells accompanied by varying numbers of multinucleated giant cells, mononuclear cells, foam cells, inflammatory cells and hemosiderin deposits. The gold standard for detect- ing and monitoring the disease is MRI, where the characteristic hemosiderin accumulation can be best appreciated, but it is a histological examination that is most conclusive. The main treatment is surgical resection of all pathological tissue, but radio- and chemotherapy are also viable options for certain groups of patients.

Total ankle arthroplasty with the use of Zimmer prosthesis and a review of the results of previous research conducted in this field.

The aim of this article is to describe surgical technique and early results of Total Ankle Replacement (TAR) from lateral approach using Zimmer TM prosthesis. The study uses theoretical knowledge which is the result of research conducted by other authors, and practical knowledge due to the fact that our center performs that type of operation. Arthrodesis as the current standard in the treatment of advanced degenerative ankle disease, apart from its advantages, also has many disadvantages. The relative durability and reduction of the patients' pain have been achieved at the expense of the adjacent joints. Their accelerated arthrosis is the result of compensatory loads as a consequence of change in foot biomechanics. That determined implementation of solutions that will guarantee elimination of pain in the ankle joint, preserve its motor function and improve gait, while having no negative impact on the mobility of adjacent joints.

The importance of the quality of information and the methods of its distribution in the process of promoting a healthy lifestyle.

Each piece of information is distributed in the form of a message. Its character takes various forms, it can be expressed by words or in images. It is the visual form which is the most effective tool of influence. Graphic signs are often used to convey or exchange thoughts. The signs have an informative function but they are also meant to force a specific behavior. Such a change in expectations and beliefs of a specific regulator is called the social impact. The intensity of interpersonal relationships is deliberately stimulated through an appropriate form of communication. The more expressive and emotional is its character, the greater the benefits for the quality of communication in the process of promoting healthy behaviors.

Pro-health measures as a creator of new behavior norms and attitudes.

The monograph analyzes health behaviors and main factors on the basis of which it is possible to transform a lifestyle generally focused on the well-being of an individual and society. According to WHO, health is a state of complete physical, mental and social well-being, and not only the absence of a disease. The definition clearly explains its multidimensional and multithreaded character dependent subjectively on every individual and on social and cultural conditions. Health in its general meaning becomes a subjective human feeling. Each individual plays an important role in the process of providing it. Good health condition can be achieved by proper nutrition, regular doctor's check-up visits and active way of life. Health behaviors are still a key element of the daily activity of everyone. Despite the fact that full knowledge of the concept of "healthy lifestyle" prevails, still many people avoid categorical statements. In response to questions about lifestyle, a significant number of respondents often indicate an intention or willingness to change, or to partially comply with the requirements, which results from weakness and lack of determination in action. Knowledge supported by the offer of attractive models that promote the right patterns of behavior can have a positive impact on the global health of the society.

In-hospital mortality among patients with proximal femur fractures infected with COVID-19.

The COVID-19 pandemic has significantly reduced the number of orthopedic surgeries world- wide. The main reason for this was an introduction of numerous restrictions in the field of mobility, which resulted in reduction of circumstances predisposing to injuries. This had a positive impact on the overall readiness of the health system to fight the pandemic, thanks to saving human and material resources that could be successfully allocated in order to fight a new, previously unknown threat. On the other hand, such aimed administration of the system was not indifferent in terms of care quality directed towards traumatized patients, often requiring immediate measures (risk of infection transmission). This study aims to evaluate in-hospital mortality in patients with COVID-19 operated on proximal femur fractures. An attempt was also made to determine predictors influencing mortality rate among patients operated over the analyzed period.

Information impact on synaptic arousal and formation of permanent memory trace.

Memory trace is an effect of temporary arousal (perception, experience, action) that causes a specific change in the nervous system. Memory allows to record and recall various information, thus enabling to learn new things. It is an extremely active and dynamic process. The influence of emotions on memory is obvious, largely determined by the close cooperation of the amygdala (responsible for emotions) and the hippocampus (memory processes).

Pigmented villonodular synovitis.

Pigmented villonodular synovitis (PVNS) is a benign disease that rarely undergoes malignant transformation. There are two types of disease: localized (nodular tenosynovitis) and di used (pigmented villonodular synovitis/tenosynovitis) with intra- or extra-articular locations. The second one is limited to synovium of the burse (PVNB) or tendon sheath (PVNTS). The intraarticular lesions are usually located in the knee, hip, ankle and elbow joints. Histologically, PVNS is a tenosynovial giant cell tumor, characterized by proliferation of two types of mononuclear cells - predominantly small, histiocyte-like cells and larger cells with dense cytoplasm, reniform or lobulated nucleus, with accompanying multinucleated giant cells and macrophages overloaded with hemosiderin that give typical image on MRI - currently selected as a gold standard for its diagnosis. The classic X-ray and CT are non-specific but similar to ultrasound should be used to evaluate disease progression and treatment response if radiotherapeutic and pharmacological methods were selected for treatment. An open arthroscopic surgery could also be applied in selected cases.