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Understanding Benign Neoplasms and Local Invasion in Pathology

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Understanding Benign Neoplasms and Local Invasion in Pathology

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Questions and Answers

What is a characteristic of most benign tumors?

They are always demarcated from the surrounding tissue

They form encapsulated masses (correct)

They always infiltrate and metastasize

They lack a well-developed capsule

What is a distinguishing feature of leiomyoma of the uterus?

It is always encapsulated

It always infiltrates and metastasizes

It lacks a well-developed capsule (correct)

It is highly invasive

Why do surgical pathologists carefully examine the margins of resected tumors?

To look for well-defined capsules

To check for progressive infiltration

To ensure they are devoid of cancer cells (correct)

To confirm they are highly invasive

What distinguishes the growth pattern of cancers from benign tumors?

Cancers grow by infiltration and destruction of surrounding tissue Signup and view all the answers

What is a distinguishing feature of malignant tumors?

They do not develop well-defined capsules Signup and view all the answers

What is hypertrophy?

An increase in the size of cells due to the synthesis of more proteins and cell organelles Signup and view all the answers

What is hyperplasia?

An increase in the number of cells in an organ or tissue Signup and view all the answers

What stimulates hypertrophy in the heart?

Chronic hemodynamic overload Signup and view all the answers

What causes pathologic hyperplasia?

Excesses of hormones or growth factors acting on target cells Signup and view all the answers

What is the main difference between hypertrophy and hyperplasia?

Hypertrophy refers to an increase in cell size, while hyperplasia refers to an increase in cell number Signup and view all the answers