KMU Past Paper Practice

Question:

A 56-year-old man with infective endocarditis develops persistent fever and right upper-quadrant discomfort despite appropriate cardiac treatment. CT demonstrates several small abscesses scattered through both hepatic lobes, with no biliary obstruction or intra-abdominal infection. Which route most likely allowed the organisms to reach the liver?

Portal venous spread from bowel

Ascending spread through bile ducts

Hematogenous spread through hepatic arteries

Direct spread across the diaphragm

Implantation across the peritoneal surface

Correct Answer: Hematogenous spread through hepatic arteries

Explanation: Bacteremia can seed hepatic tissue through the arterial circulation, producing multiple pyogenic abscesses when no portal or biliary source is present.

Question:

A 63-year-old patient is diagnosed with a pyogenic liver abscess. Extensive evaluation reveals no biliary disease, intra-abdominal infection, bacteremia, trauma or recent hepatic procedure. Which description best applies to this abscess?

Cryptogenic pyogenic abscess

Amoebic hepatic abscess

Secondary hydatid cyst

Necrotic hepatic adenoma

Metastatic hepatic deposit

Correct Answer: Cryptogenic pyogenic abscess

Explanation: A pyogenic abscess is termed cryptogenic when no identifiable biliary, portal, hematogenous, traumatic or direct infective source is found.

Question:

A patient with fever, tender hepatomegaly and an imaging-confirmed liver abscess undergoes laboratory assessment. Which biochemical abnormality would be most compatible with hepatic involvement in this condition?

Markedly reduced serum amylase

Isolated rise in serum troponin

Marked increase in serum creatinine kinase

Isolated reduction in serum calcium

Increase in serum alkaline phosphatase

Correct Answer: Increase in serum alkaline phosphatase

Explanation: Alkaline phosphatase may rise in liver abscess because hepatic inflammation and associated cholestatic disturbance affect the biliary-hepatic interface.

Question:

A patient with a large right-lobe liver abscess develops increasing dyspnea, pleuritic chest pain and a new right-sided pleural effusion. Which complication best explains these findings?

Portal venous obstruction

Transdiaphragmatic extension into the pleural space

Compression of the common bile duct

Malignant transformation of the abscess wall

Spread into the pancreatic duct

Correct Answer: Transdiaphragmatic extension into the pleural space

Explanation: A superior right-lobe abscess can extend across the diaphragm, producing pleural inflammation, effusion or pulmonary involvement.

Question:

A 38-year-old man with an amoebic liver abscess improves after treatment directed against invasive amoebiasis. Which additional therapeutic principle helps prevent persistence of the intestinal reservoir?

Long-term antibacterial prophylaxis

Routine hepatic arterial embolization

Elective resection of the affected liver segment

Therapy directed against residual luminal organisms

Repeated diagnostic aspiration after recovery

Correct Answer: Therapy directed against residual luminal organisms

Explanation: Treating invasive hepatic disease does not necessarily eradicate intestinal organisms; luminal therapy addresses the remaining bowel reservoir.

Question:

Histological examination from a hepatic necrotic lesion shows extensive hepatocyte destruction but relatively little neutrophilic inflammation. The patient has no evidence of bacterial sepsis. Which pathological process best fits this pattern?

Suppurative bacterial destruction

Amoebic hepatocyte necrosis

Vascular cavern formation

Hepatocellular adenomatous change

Metastatic gland formation

Correct Answer: Amoebic hepatocyte necrosis

Explanation: Uncomplicated amoebic liver abscess shows extensive hepatic necrosis with comparatively little neutrophilic inflammation, unlike a pyogenic abscess.

Question:

A 59-year-old man with hereditary iron overload has developed cirrhosis. During follow-up, his physician explains that his chronic liver disease increases the risk of a primary hepatic malignancy. Which malignancy is of greatest concern?

Cavernous hemangioma

Focal nodular hyperplasia

Hepatocellular adenoma

Hepatic hydatid disease

Hepatocellular carcinoma

Correct Answer: Hepatocellular carcinoma

Explanation: Hereditary hemochromatosis with advanced chronic liver injury and cirrhosis is an established background for development of HCC.

Question:

A man with chronic exposure to improperly stored food develops a primary malignant hepatocellular tumor. Viral markers are negative. Which environmental factor from this history is most relevant to the tumor’s etiology?

Aflatoxin exposure

Hydatid antigen exposure

Enteric bacterial endotoxin

Amoebic trophozoite exposure

Biliary sludge exposure

Correct Answer: Aflatoxin exposure

Explanation: Chronic aflatoxin exposure is a recognized carcinogenic influence in hepatocellular carcinoma and may act independently or with other hepatic risk factors.

Question:

Two patients develop hepatocellular carcinoma: one after chronic hepatitis C and the other after long-standing alcohol-related cirrhosis. Which pathological sequence is shared by both backgrounds?

Portal bacterial colonization followed by abscess formation

Parasitic implantation followed by daughter-cyst formation

Repeated injury, regeneration and accumulation of genomic damage

Acute biliary obstruction followed by suppurative necrosis

Vascular malformation followed by benign hepatocyte hyperplasia

Correct Answer: Repeated injury, regeneration and accumulation of genomic damage

Explanation: Chronic hepatocyte injury drives repeated regeneration and progressive genomic damage, allowing dysplastic clones to evolve toward malignant transformation.

Question:

A cirrhotic patient has several hepatocellular carcinoma nodules confined to the liver. Liver function is relatively preserved, and there is no major vascular invasion or distant spread. Which broad treatment approach best matches this disease pattern?

Observation without oncologic treatment

Emergency surgical drainage

Routine antimicrobial therapy

Locoregional tumor-directed therapy

Symptom-directed care alone

Correct Answer: Locoregional tumor-directed therapy

Explanation: Multinodular liver-limited HCC with preserved function and no major vascular or distant spread broadly corresponds to disease in which locoregional therapy may be appropriate.

Question:

A patient has a small localized hepatocellular carcinoma arising in a severely cirrhotic liver. The oncology team considers a treatment capable of addressing both the malignant lesion and the underlying end-stage liver disease. Which option best meets this objective?

Abscess catheter drainage

Luminal anti-amoebic therapy

Hydatid cyst aspiration

Liver transplantation

Antibacterial source control

Correct Answer: Liver transplantation

Explanation: In appropriately selected patients, transplantation can remove the HCC while simultaneously replacing the severely cirrhotic liver.

Question:

A patient with preserved hepatic function has a small localized HCC but is not an appropriate candidate for surgical resection. Which treatment principle offers direct destruction of the tumor while preserving most surrounding liver?

Broad-spectrum antibiotic therapy

Local tumor ablation

Diagnostic cyst aspiration

Biliary decompression alone

Long-term observation only

Correct Answer: Local tumor ablation

Explanation: Local ablation can directly destroy selected small HCCs and is a potentially curative option when resection is unsuitable.

Question:

A patient with HCC is found to have extrahepatic metastatic disease and cancer-related symptoms. Curative local treatment is no longer appropriate. Which broad therapeutic strategy is most suitable?

Systemic anticancer therapy

Percutaneous abscess drainage

Antihelminthic therapy alone

Luminal amoebic eradication

Routine surgical drainage

Correct Answer: Systemic anticancer therapy

Explanation: Extrahepatic spread places HCC in an advanced clinical category in which systemic therapy becomes the major tumor-directed treatment principle.

Question:

A 66-year-old man with colorectal carcinoma is found on staging CT to have several discrete lesions in both hepatic lobes. There is no background cirrhosis. How should these liver lesions be classified most appropriately?

Benign vascular tumors

Primary hepatocellular tumors

Primary biliary tumors

Parasitic hepatic lesions

Secondary metastatic tumors

Correct Answer: Secondary metastatic tumors

Explanation: Tumors reaching the liver from an extrahepatic primary malignancy are classified as secondary or metastatic hepatic tumors.

Question:

Imaging shows a small hepatic lesion with features strongly suggestive of a benign vascular tumor. A junior doctor proposes percutaneous biopsy for confirmation. Which concern is most relevant before proceeding?

Risk of intestinal amoebic spread

Risk of hydatid dissemination

Risk of hemorrhage from a vascular lesion

Risk of inducing portal cirrhosis

Risk of causing biliary obstruction

Correct Answer: Risk of hemorrhage from a vascular lesion

Explanation: Cavernous hemangioma is composed of large blood-filled vascular spaces, so unnecessary biopsy can cause significant bleeding.

Question:

A well-circumscribed benign liver lesion is found incidentally in a young woman. Histology shows non-neoplastic hepatocyte proliferation, and its development is believed to reflect an underlying localized vascular abnormality. Which lesion is most likely?

Focal nodular hyperplasia

Hepatocellular carcinoma

Pyogenic liver abscess

Hydatid liver cyst

Metastatic adenocarcinoma

Correct Answer: Focal nodular hyperplasia

Explanation: Focal nodular hyperplasia is a benign non-neoplastic hepatocellular proliferation thought to arise in response to a localized vascular abnormality.

Question:

A resected well-circumscribed benign hepatocellular tumor is composed of sheets of hepatocytes but lacks the normal portal-tract architecture seen in surrounding liver. Which diagnosis best matches this morphology?

Cavernous hemangioma

Focal nodular hyperplasia

Hepatic hydatid cyst

Hepatocellular adenoma

Amoebic liver abscess

Correct Answer: Hepatocellular adenoma

Explanation: Hepatocellular adenoma is a well-circumscribed benign neoplasm composed of hepatocyte sheets with loss of normal portal-tract architecture.

Question:

A patient with a selected uncomplicated hepatic hydatid cyst is considered suitable for a controlled image-guided percutaneous procedure. Which sequence describes the intended therapeutic technique?

Biopsy, culture, drainage and surgical closure

Puncture, aspiration, scolicidal injection and re-aspiration

Aspiration, embolization, biopsy and observation

Incision, drainage, packing and secondary closure

Puncture, cytology, chemotherapy and resection

Correct Answer: Puncture, aspiration, scolicidal injection and re-aspiration

Explanation: PAIR is a controlled image-guided technique involving puncture, aspiration, injection of a suitable scolicidal agent and re-aspiration in selected cysts.

Question:

A patient with a previously uncomplicated hepatic hydatid cyst develops fever, increasing right upper-quadrant pain and inflammatory markers. Imaging shows new internal inflammatory change without evidence of rupture into the bile ducts. Which complication is most likely?

Malignant transformation

Portal-vein invasion

Hepatocellular dysplasia

Amoebic superinfection

Secondary bacterial infection of the cyst

Correct Answer: Secondary bacterial infection of the cyst

Explanation: A hydatid cyst may become secondarily infected, changing from a relatively sterile parasitic cyst into an inflammatory infected collection with fever and pain.

Question:

Ultrasonography identifies a complex hepatic cyst suspicious for hydatid disease. Before planning intervention, the surgical team needs better assessment of cyst-wall calcification, anatomical relationships and possible complications. Which investigation is most useful for this purpose?

Plain abdominal radiography alone

Stool microscopy alone

Computed tomography of the liver

Serum alpha-fetoprotein testing

Blood culture without imaging

Correct Answer: Computed tomography of the liver

Explanation: CT provides detailed assessment of hydatid cyst size, wall calcification, anatomical relations and complications, making it valuable for treatment planning.