KMU Past Paper Practice

Question:
A 12-year-old boy has chronic productive cough and repeated chest infections. CT demonstrates bronchi that remain wider than their accompanying pulmonary arteries and fail to taper toward the periphery. Which interpretation best explains these imaging findings?

Options:

Correct Answer: Permanent abnormal enlargement of the bronchi

Explanation: Failure of normal bronchial tapering with bronchi disproportionately larger than accompanying arteries reflects irreversible bronchial dilatation characteristic of bronchiectasis.

Question:
A child has recurrent bacterial pneumonias affecting different lung regions and subsequently develops widespread bronchiectatic changes. There is no history of foreign-body aspiration or cystic fibrosis. Which category of predisposing disorder should be considered most strongly?

Options:

Correct Answer: Underlying impairment of host defense

Explanation: Recurrent infections involving multiple lung regions should raise suspicion of a generalized host-defense problem, which can predispose to diffuse bronchiectatic damage.

Question:
A lung specimen from a patient with severe chronic bronchiectasis shows markedly dilated distal bronchi filled with purulent secretions. The surrounding tissue contains chronic inflammatory infiltrates and areas of fibrosis. Which gross pattern may develop when the distal airways become progressively ballooned?

Options:

Correct Answer: Saccular airway dilatation

Explanation: Advanced bronchiectasis may produce sac-like enlargement of affected airways; cylindrical and fusiform forms represent other morphological patterns of bronchial dilatation.

Question:
A 14-year-old girl with established bronchiectasis continues to have repeated infective exacerbations despite treatment of individual infections. Which feature of the established disease best explains this tendency to recur?

Options:

Correct Answer: Distorted airways continue to retain secretions

Explanation: Once bronchi are structurally distorted, ineffective drainage favors secretion retention and further infection, creating a self-perpetuating cycle of airway injury.

Question:
A 6-year-old child began having recurrent wheezing only after the age of 4 years. The parents report no significant wheezing during infancy. Which recognized childhood wheezing phenotype best fits this temporal pattern?

Options:

Correct Answer: Late-onset wheeze

Explanation: Late-onset wheezers are symptom-free in early life and develop wheezing later in childhood, distinguishing them from transient and persistent early phenotypes.

Question:
Two preschool children have recurrent wheezing. One wheezes only with viral respiratory illnesses, while the other also develops symptoms with exercise and between infections. Which child has the pattern more suggestive of continuing airway hyperreactivity?

Options:

Correct Answer: The child symptomatic between viral episodes

Explanation: Symptoms with multiple triggers and between viral infections indicate a pattern more likely to persist than wheezing confined to discrete viral illnesses.

Question:
A 3-year-old boy has recurrent wheezing and allergic rhinitis. His father had childhood asthma. When counseling the parents, which conclusion best integrates these findings?

Options:

Correct Answer: The combination increases the likelihood of persistence

Explanation: Atopic disease together with a first-degree family history of asthma increases the probability that recurrent preschool wheeze will persist.

Question:
A previously healthy 7-month-old infant develops coryza followed by cough, wheezing and increased work of breathing. Examination shows diffuse crackles and wheeze. Which clinical interpretation is most appropriate?

Options:

Correct Answer: An acute small-airway viral illness is most likely

Explanation: A first episode of wheeze and respiratory distress following an upper respiratory prodrome in infancy fits bronchiolitis rather than chronic structural or recurrent wheezing disorders.

Question:
An infant with bronchiolitis remains alert, maintains satisfactory oxygen saturation and takes smaller but adequate feeds. Respiratory distress is mild. Which approach is most appropriate at this stage?

Options:

Correct Answer: Observation with supportive measures

Explanation: Mild bronchiolitis with preserved oxygenation and adequate feeding is managed primarily with supportive care while monitoring respiratory and hydration status.

Question:
A 5-month-old infant with bronchiolitis becomes unable to maintain oral intake because of tachypnea. Oxygen saturation remains acceptable. Which immediate problem should specifically be addressed in addition to continued respiratory observation?

Options:

Correct Answer: Risk of inadequate hydration

Explanation: Tachypnea can interfere with feeding, making hydration an important component of supportive bronchiolitis management even when oxygenation is satisfactory.

Question:
A 4-year-old child has chronic respiratory symptoms, poor growth and a sibling with confirmed cystic fibrosis. The clinical team wants to establish whether the child meets diagnostic criteria rather than relying on symptoms alone. Which approach is most appropriate?

Options:

Correct Answer: Confirm a compatible clinical context together with evidence of CFTR dysfunction

Explanation: Cystic fibrosis diagnosis requires an appropriate clinical or familial context plus objective evidence that CFTR function is abnormal; symptoms alone are insufficient.

Question:
A child has recurrent sinopulmonary disease and failure to thrive. A sweat chloride result is obtained as part of evaluation for cystic fibrosis. Why is this test useful in establishing the diagnosis?

Options:

Correct Answer: It assesses a physiological consequence of CFTR dysfunction

Explanation: Sweat chloride testing provides functional evidence of abnormal CFTR-dependent electrolyte handling and therefore supports the diagnosis in the appropriate clinical setting.

Question:
A 9-year-old child with cystic fibrosis has chronic cough and recurrent pulmonary exacerbations. Over time, imaging shows progressive airway distortion. Which relationship best explains why the respiratory disease tends to worsen?

Options:

Correct Answer: Repeated infection and inflammation progressively injure airway structure

Explanation: Retained secretions favor recurrent infection, while repeated inflammation damages airway architecture, creating progressive structural lung disease in cystic fibrosis.

Question:
A child with cystic fibrosis has chronic malabsorption despite an adequate diet. Laboratory evaluation suggests deficiency of fat-soluble nutrients. Which primary organ dysfunction most directly accounts for this nutritional problem?

Options:

Correct Answer: Exocrine pancreatic insufficiency

Explanation: Pancreatic duct obstruction reduces delivery of digestive enzymes, impairing fat digestion and consequently the absorption of fat-soluble nutrients.

Question:
A 10-year-old child with cystic fibrosis develops progressive hepatobiliary abnormalities. The same basic epithelial disorder responsible for the pulmonary disease also affects the biliary system. Which pathological consequence is most consistent with this relationship?

Options:

Correct Answer: Biliary obstruction with progressive fibrosis

Explanation: Abnormal epithelial secretions can obstruct small biliary channels, producing chronic inflammation and progressive hepatobiliary fibrosis.

Question:
Parents of a boy with cystic fibrosis ask why a disease recognized mainly because of respiratory and digestive problems may affect fertility later in life. Which explanation is most appropriate?

Options:

Correct Answer: The disorder may affect development of the male reproductive ducts

Explanation: Cystic fibrosis can involve abnormal development or absence of the vas deferens, producing obstructive male infertility despite preserved endocrine function.

Question:
A child with recurrent respiratory disease has bronchiectatic changes on imaging. The clinician considers cystic fibrosis, primary ciliary dysfunction and a previous foreign-body aspiration. Which feature would most strongly favor cystic fibrosis as the underlying multisystem disorder?

Options:

Correct Answer: Associated pancreatic malabsorption and poor growth

Explanation: The combination of chronic airway disease with pancreatic malabsorption demonstrates the characteristic multisystem epithelial involvement of cystic fibrosis.

Question:
A newborn with intestinal obstruction is subsequently investigated for a disorder that later may cause recurrent pulmonary disease and pancreatic insufficiency. Which interpretation best connects the neonatal presentation with the later manifestations?

Options:

Correct Answer: A single epithelial transport disorder can affect several organ systems

Explanation: CFTR dysfunction affects epithelial secretion in multiple organs, explaining how neonatal intestinal obstruction can coexist with later respiratory and pancreatic disease.

Question:
During clinical work, a consultant assigns a junior doctor a procedure that the junior has not yet been trained to perform independently. The junior feels unable to refuse because of the difference in seniority. Which principle has been inadequately addressed?

Options:

Correct Answer: Delegation according to competence and appropriate authority

Explanation: Safe delegation requires matching the task to the recipient’s competence while recognizing that hierarchical power can make juniors reluctant to express limitations.

Question:
A team leader asks a junior member to coordinate a ward task, provides the necessary authority and resources, and remains available for guidance. The junior completes the task and reports the outcome. Which leadership principle is best demonstrated?

Options:

Correct Answer: Effective delegation with appropriate empowerment

Explanation: Effective delegation gives a competent team member sufficient authority and resources to perform the task while maintaining appropriate communication and senior oversight.