Pathology MCQ- 6

Q- Which of the following conditions is characterized by irregular blotchy patches of hyperpigmentation localized mostly on the face caused by sun exposure, pregnancy and contraceptive pills?

A- Benign lentigo

B- Freckles

C- Melasma

D- Vitiligo

C- Melasma- This is a typical presentation. A- Lentigo are small oval light brown macules. B- Freckles are light brown macules on face, shoulders and trunk. D- Vitiligo are irregular depigmented skin patches and can occurs anywhere.

Q- Which one of the following conditions characterized by hemolytic episodes caused by increased erythrocyte sensitivity to complement lytic actions?

A- Glucose-6-phosphate dehydrogenase deficiency anemia

B- Hereditary spherocytosis

C- Paroxysmal nocturnal hemoglobinuria

D- Sickle cell anemia

C- Paroxysmal nocturnal hemoglobinuria- A- Is caused by enzyme deficiency. B- Is caused by autosomal dominant disorder. D- Is caused by nucleotide change.

Q- Which of the following features are most likely seen in a case of Takayasu arteritis?

A- Blanching and cyanosis of the fingers and toes

B- Blindness and pulseless upper extremities

C- Febrile lymphadenopathy with rah

D- Major organ failures

B- Blindness and pulseless upper extremities-A- Is Raynaud disease. C- Is Kawasaki disease. D- Is polyarteritis nodosa and some autoimmune diseases.

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