江汉大学：《病理学》课程PPT教学课件（讲稿）Chapter 05 肿瘤 Neoplasm, tumor（Cancer，主讲：王成鑫）

Definitions of tumors A tumor is an abnormal mass of tissue resulting from autonomous disordered growth which persists after the initiating stimulus has been removed Progressive- Purposeless Parasitic

Section 1: Concept of Tumor Definitions of tumor: A tumor is an abnormal mass of tissue resulting from autonomous disordered growth which persists after the initiating stimulus has been removed. Progressive— Purposeless-- Parasitic --

Concept of Tumor Tumorigenic agent Lot→e cell Growth control Uncontrolled atypia growth dysplasia neoplasm

Concept of Tumor Tumorigenic agent Local tissue cell Growth control Uncontrolled growth atypia dysplasia neoplasm

neoplasm usually mass

neoplasm mass usually

Neoplastc proliferation Incon- Differ from UI ncon trolled trolled atypia Inflammatory Malfor- proliferation mation

Neoplastc proliferation Malfor￾mation Inflammatory proliferation Differ from Uncon￾trolled Uncon￾trolled atypia

Any increase in tissue size is not necessarily neoplasia. Here is an example of left ventricular cardiac hypertrophy in which there has been an increase in the size of the mvocardial fibers

Any increase in tissue size is not necessarily neoplasia. Here is an example of left ventricular cardiac hypertrophy in which there has been an increase in the size of the myocardial fibers