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

Forms of tumours growth

Infiltrative and expansive growth

Ways of the tumours metastases

Ways of the tumours metastases

Haematogenic

Lymphogenic ImplantogenicPerineural

MIXT

Metastases

Description of benign and malignant tumours

Benign Malignant

Have insignificant deviations from maternal tissue

Atypіzm is expressed

Expansive growth Infiltrative growth

Grow slowly Grow quickly

Achieve largenesses Rarely achieve largenesses

Formed sore rarely Formed sore often

Does not give metastases Give metastases

The relapse is not characteristic The relapse is often

The common state of patient violates a little

Have a considerable influence on all organism

I thank you for attention!