All Free Pathology MCQs with Answers

• A. Bradycardia
• B. Decreased Salivation
• C. Decreased Sweating
• D. Mydriasis

Explanation: Atropine blocks muscarinic vagal effects, causing dry mouth, reduced sweating and mydriasis; at usual doses it tends to produce…

• A. Fontania stain
• B. PAS
• C. Ferrous trichrome
• D. Pearls prussian blue

Explanation: Periodic acid-Schiff stain highlights fungal cell-wall carbohydrates, making fungi readily visible in tissue sections.

• A. Osteogenic sarcoma
• B. Ewings sarcoma
• C. Osteoclastoma
• D. Chondro sarcoma

Explanation: A tumour centred in the epiphysis of a long bone is classically a giant cell tumour, also called osteoclastoma.

• A. Ewing's sarcoma
• B. Giant cell tumourOrder DNA Kits
• C. Chondrosarcoma
• D. Osteosarcoma

Explanation: In an adolescent, a mixed lytic and blastic lesion in the metaphysis near the knee strongly indicates osteosarcoma.

• A. Viral meningitis
• B. Pyogenic bacterial meningitis
• C. Fungal meningitis
• D. Tuberculous meningitis

Explanation: A lymphocyte-predominant CSF with normal glucose and normal or mildly raised protein is typical of viral meningitis.

• A. 2
• B. 4
• C. 6
• D. 9

Explanation: Cartilage commonly contains type II collagen with smaller amounts of types VI, IX and XI, whereas type IV is characteristic of basement…

• A. Medulla oblongata
• B. Spinal card
• C. Basal cisternae
• D. Brain parenchyma

Explanation: The brain parenchyma is the commonest site of intracranial neurocysticercosis, where cysts may be seen in different stages of…

• A. lepromatous leprosy
• B. Ideterminate leprosy
• C. Borderline tuberculoid leprosy
• D. Tuberculoid leprosy

Explanation: Virchow cells are lipid-laden macrophages packed with Mycobacterium leprae and are characteristic of lepromatous leprosy.

• A. Gonorrhea
• B. Tuberculosis
• C. AIDS
• D. Syphilis

Explanation: A Ghon focus is the small primary parenchymal lesion of pulmonary tuberculosis, usually accompanied by involved hilar lymph nodes to form…

• A. Undergoes cavitation
• B. Progresses to tuberculous pneumonia
• C. Undergoes calcification
• D. Progresses to military tuberculosis

Explanation: A primary tuberculous Ghon complex commonly heals by fibrosis and calcification, sometimes becoming a Ranke complex.

• A. Formation of sinusoids
• B. Vitamin-A storage
• C. Increases blood perfusion
• D. PhagocytosisConsult Online Doctors

Explanation: Kupffer cells are specialised macrophages lining the hepatic sinusoids, where they remove bacteria, aged blood cells, and particulate…

• A. Actinomyces israeli
• B. Mycobacterium leprae
• C. Mycobacterium bovis
• D. All of the above

Explanation: Actinomyces israelii is a filamentous, branching bacterium that resembles a fungus and forms sulfur granules in tissue.

• A. Sarcoidosis
• B. Diphtheria
• C. Tuberculosis
• D. Actinomycosis

Explanation: The Kveim test uses an extract of sarcoid tissue and was historically used to support the diagnosis of sarcoidosis.

• A. Primary
• B. Tetriary
• C. Secondary
• D. Congenital

Explanation: Secondary syphilis has the highest infectivity because widespread spirochetemia produces abundant organisms in mucocutaneous lesions.

• A. Comminuted fracture
• B. Compound fracture
• C. Simple fracture
• D. Green stick fracture

Explanation: A greenstick fracture is an incomplete break in which the bone bends and cracks, commonly occurring in children because their bones are…

• A. Pagets disease
• B. Osteomyelitis
• C. Fibrous dysplasia
• D. Achondroplasia

Explanation: Paget disease of bone classically produces a cotton-wool appearance on skull radiographs because of irregular, mixed lytic and sclerotic…

• A. Ossifying fibroma
• B. Aneurysmal bone cyst
• C. Fibrous dysplasia
• D. None of the above

Explanation: An aneurysmal bone cyst produces an expansile, eccentric, ballooned-out lesion filled with blood-filled spaces.

• A. Thyroid
• B. Kidney
• C. Prostate
• D. Uterus

Explanation: Prostatic carcinoma classically produces osteoblastic, bone-forming metastases, especially in the spine and pelvis.

• A. Fibro sarcoma
• B. Osteosarcoma
• C. Osteoma
• D. Ewing's sarcoma

Explanation: Ewing sarcoma classically causes an onion-skin periosteal reaction due to repeated layers of reactive new bone formation.

• A. Serum LDH
• B. Serum CPK
• C. Serum SGOT
• D. Serum SGPT

Explanation: LDH remains elevated for several days after myocardial infarction and reaches its peak around the second to third day, whereas CPK may…