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Questions and Answers

What is the significance of examining the sclerae for detecting slight increases in serum bilirubin level?

Sclerae have a low elastin content, making them particularly sensitive to bilirubin deposition

Sclerae have a low collagen content, making them particularly sensitive to bilirubin deposition

Sclerae have a high collagen content, making them particularly sensitive to bilirubin deposition

Sclerae have a high elastin content, making them particularly sensitive to bilirubin deposition (correct)

What serum bilirubin level does the presence of scleral icterus indicate?

At least 80 µmol/L (4.7 mg/dL)

At least 20 µmol/L (1.2 mg/dL)

At least 51 µmol/L (3 mg/dL) (correct)

At least 100 µmol/L (5.9 mg/dL)

What can make it more difficult to detect scleral icterus during physical examination?

Fluorescent lighting in the examining room (correct)

Ultraviolet lighting in the examining room

Incandescent lighting in the examining room

Natural sunlight in the examining room

What causes green coloration of the skin in longstanding cases of jaundice?

Oxidation of bilirubin to biliverdin Signup and view all the answers

What is the differential diagnosis for yellowing of the skin, as mentioned in the text?

Jaundice, Carotenoderma, Use of the drug quinacrine, Excessive exposure to phenols Signup and view all the answers

Which statement best describes neoplasia?

It is uncontrolled growth of cells not under physiologic control Signup and view all the answers

What is a distinguishing feature of benign tumors?

Slow growth and lack of invasion Signup and view all the answers

What differentiates malignant tumors from benign tumors?

Higher rate of proliferation and potential for invasion Signup and view all the answers

What characterizes a benign tumor in terms of resemblance to normal cells?

It looks a lot like the tissue of normal cells from which it originated (well differentiated) Signup and view all the answers

What is a distinguishing feature of malignant tumors?

Potential to invade and destroy adjacent structures Signup and view all the answers

Which characteristic is common to all neoplasms?

Uncontrolled growth of cells Signup and view all the answers

What distinguishes benign tumors from malignant tumors in terms of growth rate?

Slow growth Signup and view all the answers

What is a distinguishing feature of benign tumors in relation to invasion?

Lack of invasion Signup and view all the answers

What is a characteristic of malignant tumors in terms of resemblance to normal cells?

Less differentiated appearance Signup and view all the answers

What is a distinguishing feature of neoplasia in relation to clonality?

All neoplasms are monoclonal Signup and view all the answers