KMU Past Paper Practice

Question:

A 61-year-old man with systemic amyloidosis develops progressive ankle edema and heavy proteinuria. Renal function is initially preserved. Which pathological process most directly explains his urinary protein loss?

Options:

Correct Answer: Extracellular protein deposition distorting the filtration barrier

Explanation: Amyloid deposition within glomeruli disrupts the filtration barrier, allowing substantial plasma protein loss and producing a secondary nephrotic syndrome.

Question:

A 54-year-old woman with long-standing diabetes mellitus has normal serum creatinine during routine follow-up. Which renal abnormality is expected to become clinically detectable earliest as diabetic glomerular injury develops?

Options:

Correct Answer: Increasing urinary albumin excretion

Explanation: Increasing urinary albumin loss is an early clinically detectable manifestation of diabetic glomerular damage and may precede a measurable decline in filtration.

Question:

A renal biopsy from a patient with persistent proteinuria shows sclerosis involving part of the tuft in several glomeruli, while many other glomeruli appear unaffected. Which interpretation of this distribution is most accurate?

Options:

Correct Answer: Some glomeruli are affected and only part of each involved tuft is scarred

Explanation: “Focal” means only some glomeruli are involved, while “segmental” means sclerosis affects only part of an affected glomerular tuft.

Question:

A pathology report describes a membranoproliferative pattern of glomerular injury. The treating physician requests further etiological evaluation rather than considering the biopsy label a complete diagnosis. Which statement best explains this approach?

Options:

Correct Answer: The pattern can result from different immune-complex or complement-mediated mechanisms

Explanation: MPGN is a morphological pattern rather than one single disease, so identifying the underlying immune-complex or complement mechanism is important.

Question:

A 27-year-old man with acute glomerulonephritis develops facial edema and hypertension. His serum albumin is only mildly reduced. Which mechanism best explains the edema and raised blood pressure?

Options:

Correct Answer: Renal sodium and water retention from reduced filtration

Explanation: In nephritic disease, reduced GFR promotes sodium and water retention, causing extracellular volume expansion, edema and hypertension.

Question:

A glomerular biopsy from a patient with active inflammatory glomerulonephritis shows numerous neutrophils and monocytes within capillary loops. How do these cells contribute to glomerular injury?

Options:

Correct Answer: They release enzymes and oxidants that damage capillary walls

Explanation: Activated inflammatory cells release proteolytic enzymes, oxidants and other mediators that amplify immune-mediated glomerular capillary injury.

Question:

A 21-year-old man with recurrent glomerular hematuria undergoes biopsy. Immunoglobulin-containing deposits are concentrated in the mesangium. Which tissue response is most likely to accompany this deposit location?

Options:

Correct Answer: Mesangial-cell proliferation with increased matrix

Explanation: Mesangial immune deposits activate mesangial cells, producing proliferation and increased extracellular matrix within the glomerulus.

Question:

A patient with poorly controlled diabetes develops progressive mesangial expansion and glomerular basement-membrane thickening. Which combination best explains the development of these structural changes?

Options:

Correct Answer: Non-enzymatic glycation with chronic glomerular hemodynamic stress

Explanation: Chronic hyperglycemia alters matrix proteins through glycation, while glomerular hemodynamic stress promotes further matrix production and sclerosis.

Question:

A 30-year-old woman with systemic lupus erythematosus develops hematuria, proteinuria and edema. Her renal biopsy demonstrates immune deposits at more than one glomerular site. Why can this systemic disease produce either nephritic, nephrotic or mixed renal presentations?

Options:

Correct Answer: Immune deposits can affect different glomerular compartments and patterns of injury

Explanation: Lupus can produce immune-complex deposition in different glomerular locations, creating variable inflammatory and permeability defects and therefore different clinical syndromes.

Question:

An 8-year-old child develops dark urine, facial swelling and reduced urine output after a recent streptococcal infection. If renal tissue were examined during the acute illness, which light-microscopic pattern would best fit the disease process?

Options:

Correct Answer: Diffuse glomerular hypercellularity with inflammatory-cell infiltration

Explanation: APSGN produces a diffuse proliferative glomerulonephritis with increased glomerular cellularity and inflammatory-cell infiltration.

Question:

A child presents with acute post-streptococcal glomerulonephritis after the preceding throat infection has already resolved. Which management approach best reflects the pathogenesis of the renal disease?

Options:

Correct Answer: Provide supportive renal care and treat any persisting streptococcal infection

Explanation: The nephritis is immune mediated rather than due to direct renal infection, so management is mainly supportive while any ongoing streptococcal infection is appropriately treated.

Question:

The parents of a 9-year-old child recovering from uncomplicated acute post-streptococcal glomerulonephritis ask about the expected renal outcome. Which statement is most appropriate?

Options:

Correct Answer: Most children recover renal function well

Explanation: The renal prognosis of uncomplicated APSGN in children is generally favorable, although severe acute complications still require careful monitoring.

Question:

A 6-year-old child with marked nephrotic edema becomes lethargic and develops tachycardia with cool extremities. Despite generalized swelling, which complication should be considered?

Options:

Correct Answer: Intravascular volume depletion

Explanation: Severe nephrotic edema can coexist with reduced effective circulating volume because fluid has shifted from the vascular compartment into interstitial tissues.

Question:

An 8-year-old child with initially steroid-sensitive nephrotic syndrome develops repeated relapses requiring several courses of corticosteroids and begins to show treatment-related toxicity. Which management principle is most appropriate?

Options:

Correct Answer: Arrange specialist review for steroid-sparing or alternative immunomodulatory therapy

Explanation: Frequent relapses, steroid dependence or significant steroid toxicity warrant specialist reassessment and consideration of alternative immunomodulatory treatment.

Question:

A 39-year-old man with nephrotic syndrome has marked hyperlipidemia despite no previous lipid disorder. Which physiological response most directly contributes to this abnormality?

Options:

Correct Answer: Increased hepatic lipoprotein synthesis

Explanation: In nephrotic syndrome, the liver responds to plasma protein loss by increasing synthesis of proteins and lipoproteins, contributing to hyperlipidemia.

Question:

A 57-year-old woman presents with nephrotic syndrome. Biopsy demonstrates a membranous pattern. Her physician reviews her history for systemic autoimmune disease, chronic infection, drug exposure and malignancy. What is the main reason for this additional assessment?

Options:

Correct Answer: A membranous pattern may occur secondary to systemic disease or exposure

Explanation: Membranous nephropathy may be primary or secondary, so relevant systemic diseases, infections, drugs and malignancy should be considered.

Question:

A 46-year-old patient with severe nephritic syndrome develops worsening renal failure and pulmonary edema despite appropriate medical treatment. A major electrolyte disturbance also develops. Which management principle should now be considered?

Options:

Correct Answer: Renal replacement therapy for severe complications of renal failure

Explanation: Refractory fluid overload or major electrolyte disturbances in severe acute renal failure are indications to consider renal replacement therapy.

Question:

A renal biopsy from a patient with rapidly deteriorating renal function shows crescents in many glomeruli. The clinical team is asked to interpret the pathological significance before further cause-directed testing. Which interpretation is most accurate?

Options:

Correct Answer: Crescents indicate severe glomerular injury but do not define a single cause

Explanation: Crescent formation is a morphological marker of severe capillary-wall injury; the underlying immune or inflammatory cause must still be determined.

Question:

A 10-year-old child develops an acute nephritic syndrome after a recently documented streptococcal skin infection. Which additional investigation would most directly support the suspected preceding infectious trigger?

Options:

Correct Answer: Appropriate serological evidence of recent streptococcal infection

Explanation: In suspected APSGN, evidence of a preceding streptococcal infection supports the etiological link when interpreted with the clinical and renal findings.

Question:

A 44-year-old patient with nephrotic syndrome has heavy proteinuria and hyperlipidemia. Urine microscopy also demonstrates lipid-containing material. Which process best explains the appearance of lipids in the urine?

Options:

Correct Answer: Passage of circulating lipoproteins through an abnormal filtration barrier

Explanation: Severe glomerular permeability dysfunction allows lipoprotein-containing material to enter the filtrate, producing the characteristic lipiduria of nephrotic syndrome.