Tumors of epithelial tissue. Melaninformation tumors. Teratomas. In Accordance with prof. Ya.Ya. Bodnar As.-prof. V.Voloshyn

Tumours A tumour is a typical pathological process. It is characterized by potential boundlessness of uncontrolled growth, and also atypical cells and tissues and ability to pass these properties to future generations of cells on heredity.

Ephithelial tumours Depending on a hystogenesis distinguish tumours from an integumentary epithelium (multi-layered flat and transitional) and ferrous. According to motion and differentiation ephithelial tumours are benign and malignant. Depending on organ specificity select specificity organonspecificity and ephithelial tumours without specific localization.

Benign integumentary epithelium tumours without characteristic localization - villomas (papilomas) meet in a skin, larynx, urinary bladder and others like that, from ferrous epithelium. Adenomas meet in all ferrous organs. They call the followings morphological variants of adenomas: acinous (alveolar), tubular, trabecular, solid, nipple cystadenomas, villiferous adenoma, fibroadenoma.

Malignant ephithelial tumours have name cancer or carcinoma. They distinguish the followings forms of cancer without specific localization: flatcells cancer which develops from multi-layered flat epithelium and meets in the proper tissues or in mucuses, where a flatcells metaplasia took place.

Flatcells cancer

Adenocarcinoma

Brainy cancer and skyr

Tumours of melaninproducing tissue develop from the cells of neuroektodermal origin – melanocytes, which are in the basal layer of epidermis, hair follicles, leptomeninges and retina. Melanocytes can be the source of tumular formations – nevus and malignant tumours – melanomas.

Tumours of melaninproducing tissue

Properties of tumours unlimitedness of growth; boundlessness of growth; uncontrolled of growth; cells anaplasia.

Types of anaplasia (kataplasia) morphological ; biochemical ; physical and chemical ; immunological.

Etiology of tumours It is set, the tumours can be caused by physical, chemical and biological agents, which are named carcinogens. Over 75% cancers diseases at people are caused by the factors of external environment and in the first order – by chemical compounds.

Macroscopic forms of tumours

Forms of tumours growth FORMS OF TUMOURS GROWTH expansive appositional infiltrative endofits exofitus

Forms of tumours growth

Infiltrative and expansive growth

Ways of the tumours metastases Haematogenic Lymphogenic Implantogenic Perineural MIXT

Metastases

Description of benign and malignant tumours BenignMalignant Have insignificant deviations from maternal tissue Atypіzm is expressed Expansive growthInfiltrative growth Grow slowlyGrow quickly Achieve largenessesRarely achieve largenesses Formed sore rarelyFormed sore often Does not give metastasesGive metastases The relapse is not characteristicThe relapse is often The common state of patient violates a little Have a considerable influence on all organism

I thank you for attention!