Assessment of Quality of Life and Independence, as Well as Received Social Support for Spinal Cancer.

* Evaluation of the quality of life of patients before and after surgery for benign and malignant spinal cancers, assessing whether it depends on the size of the tumor, type of cancer, malignancy and its location * evaluation of patients' independence before and after surgery for benign and malignant spinal tumors, evaluation of what factors influenced patients' different independence * multidimensional assessment of perceived social support of patients before and after surgery for benign and malignant spinal cancers, taking into account three sources of support: significant person, family and friends