Renal & Urology UK Medical PG Practice Questions and MCQs
Practice UK Medical PG questions for Renal & Urology. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Renal & Urology UK Medical PG Question 1: A 38-year-old woman presents with recurrent episodes of severe abdominal pain and psychiatric symptoms. Her urine turns dark during attacks. Family history reveals similar episodes. What is the inheritance pattern?
- A. Autosomal recessive
- B. Autosomal dominant (Correct Answer)
- C. X-linked recessive
- D. X-linked dominant
- E. Mitochondrial
Renal & Urology Explanation: ***Autosomal dominant***
- The clinical picture of recurrent severe abdominal pain, psychiatric symptoms, and dark urine during attacks is highly suggestive of **Acute Intermittent Porphyria (AIP)**.
- AIP is caused by a deficiency in **hydroxymethylbilane synthase (PBG deaminase)** and is inherited in an **autosomal dominant** fashion, which explains the positive family history.
*Autosomal recessive*
- **Autosomal recessive** disorders typically manifest if two copies of the defective gene are inherited, often presenting in siblings but not consistently across multiple generations (vertical transmission) as implied by the family history.
- Conditions like **Congenital erythropoietic porphyria** are autosomal recessive but primarily cause photosensitivity and hemolytic anemia, not neurovisceral crises.
*X-linked recessive*
- **X-linked recessive** disorders predominantly affect males and are transmitted from carrier mothers to sons, a pattern inconsistent with a female patient with similar episodes in the family.
- Common examples like **Hemophilia** or **Duchenne Muscular Dystrophy** have sex-linked inheritance patterns that do not match the presented symptoms or inheritance.
*X-linked dominant*
- **X-linked dominant** inheritance would show affected fathers passing the trait to all daughters but none of their sons, and affected mothers passing it to half of their children, which is not the typical pattern for AIP.
- **X-linked protoporphyria**, a rare porphyria, follows this pattern but presents primarily with severe photosensitivity and hepatobiliary complications, not the neurovisceral attacks seen here.
*Mitochondrial*
- **Mitochondrial inheritance** is characterized by exclusive **maternal transmission**, meaning all children of an affected mother are affected, but no children of an affected father. This pattern differs from the general family history for AIP.
- Mitochondrial disorders primarily affect high-energy-demand organs, and while they can have neurological components, most porphyrias are nuclear-encoded genetic disorders, making mitochondrial inheritance highly unlikely.
Renal & Urology UK Medical PG Question 2: A 59-year-old woman presents with bone pain and fatigue. Blood tests show calcium 3.3 mmol/L, low albumin, and normal PTH. She has a history of breast cancer 5 years ago. What is the most likely mechanism?
- A. Parathyroid hormone excess
- B. PTH-related protein (Correct Answer)
- C. Vitamin D excess
- D. Bone metastases
- E. Sarcoidosis
Renal & Urology Explanation: ***PTH-related protein***- This is the most common cause of **Humoral Hypercalcemia of Malignancy (HHM)**, especially in solid tumors like breast cancer, where **PTHrP** acts as a systemic hormone, mimicking the effects of **parathyroid hormone** on bone and kidney.- The presentation of **severe hypercalcemia** (3.3 mmol/L) with normal or **suppressed PTH** strongly indicates a PTH-independent mechanism, making HHM due to PTHrP the primary diagnosis over primary hyperparathyroidism.*Parathyroid hormone excess*- **Primary Hyperparathyroidism** causes hypercalcemia due to an adenoma or hyperplasia resulting in *high* or *inappropriately normal* circulating levels of **PTH**.- In this patient, the PTH level is normal (implying suppression by the high calcium), which effectively rules out PTH excess as the direct cause of the hypercalcemia.*Vitamin D excess*- Causes hypercalcemia by increasing **intestinal calcium absorption** and promoting bone resorption, identifiable by significantly elevated levels of **25(OH)D** or active **1,25(OH)₂D**.- While possible, this mechanism is far less likely than malignancy-associated hypercalcemia in a patient with a known history of breast cancer.*Bone metastases*- Breast cancer commonly metastasizes to bone, causing **osteolytic lesions** that release calcium via local cytokine-mediated osteoclast activation.- Although common, hypercalcemia caused solely by local osteolysis tends to be less severe than the level seen here; pronounced hypercalcemia with suppressed PTH is the hallmark presentation of **humoral hypercalcemia (PTHrP)**.*Sarcoidosis*- This granulomatous disease causes hypercalcemia via ectopic production of **1-alpha-hydroxylase** by activated macrophages, leading to unregulated synthesis of active **1,25-dihydroxyvitamin D**.- This mechanism is not typically associated with breast cancer and is usually accompanied by other features of sarcoidosis, such as pulmonary symptoms or cutaneous lesions.
Renal & Urology UK Medical PG Question 3: A 41-year-old man presents with progressive weakness in his hands and arms over 12 months. He has muscle fasciculations and hyperreflexia. EMG shows both acute and chronic denervation changes. What is the prognosis?
- A. Excellent with treatment
- B. Good with supportive care
- C. Variable depending on subtype
- D. Poor with 3-5 year survival (Correct Answer)
- E. Stable with medication
Renal & Urology Explanation: ***Poor with 3-5 year survival***
- The presentation with **progressive weakness**, **muscle fasciculations** (lower motor neuron sign), and **hyperreflexia** (upper motor neuron sign), along with mixed **acute and chronic denervation** on EMG, is highly characteristic of **Amyotrophic Lateral Sclerosis (ALS)**.
- **ALS** is a rapidly progressive neurodegenerative disease, and the typical survival time from diagnosis is **3 to 5 years**, often due to respiratory failure.
*Excellent with treatment*
- **ALS** is an incurable disease, and current treatments such as **Riluzole** or **Edaravone** only offer a modest slowing of disease progression or symptom management, not an excellent prognosis.
- There is no known treatment that can halt or reverse the neurodegeneration characteristic of **ALS**.
*Good with supportive care*
- While **supportive care** (e.g., respiratory support, physical therapy, nutritional guidance) is essential for managing symptoms and improving quality of life in **ALS**, it does not alter the underlying progressive and fatal nature of the disease.
- The relentless degeneration of motor neurons continues despite comprehensive supportive measures, leading to eventual paralysis and death.
*Variable depending on subtype*
- While there are different clinical presentations (e.g., bulbar vs. limb onset) and genetic forms of **ALS**, the overall prognosis for classic **ALS** is uniformly poor.
- Although a small percentage of patients may have a longer survival, the vast majority follow a progressive course with a limited life expectancy, making a
Renal & Urology UK Medical PG Question 4: A 61-year-old man presents with progressive dyspnea and fatigue. Echocardiogram shows severe aortic stenosis with valve area $0.5\mathrm{cm}^2$. He develops syncope during exercise testing. What is the most appropriate management?
- A. Medical management
- B. Balloon aortic valvuloplasty
- C. Urgent aortic valve replacement (Correct Answer)
- D. Heart transplantation
- E. ICD insertion
Renal & Urology Explanation: ***Urgent aortic valve replacement***
- The patient has **severe aortic stenosis** (valve area $0.5\mathrm{cm}^2$) and is highly symptomatic, indicated by **syncope during exercise**, which significantly increases the risk of sudden cardiac death.
- **Aortic valve replacement (AVR)** or TAVR is the definitive and urgent treatment required for symptomatic severe AS to alleviate symptoms and improve survival.
*Medical management*
- Medical therapy does not treat the underlying **fixed mechanical obstruction** of the aortic valve, making it ineffective for severe symptomatic AS.
- Relying solely on medical management in this scenario leads to a very poor prognosis due to the high risk of **sudden cardiac death**.
*Balloon aortic valvuloplasty*
- BAV is primarily a temporary measure, often used as a **bridge to AVR/TAVR** or in hemodynamically unstable patients, due to its high rate of restenosis.
- Given the patient is likely a surgical candidate, BAV is not considered the **definitive long-term solution** for severe AS.
*Heart transplantation*
- Heart transplantation is reserved for **end-stage heart failure** that is refractory to other medical and surgical options.
- The primary pathology (severe AS) is surgically addressable via AVR, making transplantation an **inappropriate** initial therapy.
*ICD insertion*
- Syncope in severe AS is typically due to **flow limitation** and **exertional hypotension** caused by the fixed obstruction, rather than primary ventricular tachyarrhythmias.
- Treating the underlying mechanical pathology with AVR resolves the cause of the syncope and the high risk of sudden death; therefore, an **ICD is not indicated**.
Renal & Urology UK Medical PG Question 5: A 65-year-old man presents with painless hematuria. Cystoscopy shows a bladder tumor. Histology confirms transitional cell carcinoma. What is the most important risk factor for this condition?
- A. Alcohol consumption
- B. Smoking (Correct Answer)
- C. High-fat diet
- D. Sedentary lifestyle
- E. Family history
Renal & Urology Explanation: ***Smoking***- **Smoking** is by far the most significant and prevalent risk factor for urothelial (transitional cell) carcinoma, contributing to approximately 50-70% of all cases.- Tobacco smoke contains **aromatic amines** and other carcinogens that are metabolized, excreted in urine, and concentrate in the bladder, leading to **DNA damage** and tumor formation.*Alcohol consumption*- Alcohol consumption is not considered a primary or independent risk factor specifically for **urothelial carcinoma**.- While excessive alcohol intake is linked to other cancers, its direct association with bladder cancer is not robust.*High-fat diet*- High-fat diets are generally associated with an increased risk of certain cancers, such as **colorectal** and **prostate** cancer.- However, dietary factors do not represent the primary pathogenic mechanism for transitional cell carcinoma, which is predominantly driven by urinary carcinogens.*Sedentary lifestyle*- A sedentary lifestyle is a generalized risk factor for several cancers, particularly those linked to **obesity** and metabolic syndromes (e.g., endometrial, breast).- There is no strong, direct, or specific mechanistic link between a sedentary lifestyle and the development of **urothelial carcinoma** compared to chemical exposures.*Family history*- While a small proportion of bladder cancers may show some familial clustering, **environmental exposures** like smoking and occupational chemicals are the overwhelming etiologic factors.- Familial predisposition is a minor risk factor and is considerably less important than direct carcinogenic exposure from **smoking**.
Renal & Urology UK Medical PG Question 6: A 29-year-old woman at 32 weeks gestation presents to the obstetric assessment unit with headache and right upper quadrant pain. She has no significant past medical history. Blood pressure is 168/112 mmHg. Blood tests show: haemoglobin 102 g/L, platelets 88 × 10^9/L, ALT 245 U/L, AST 312 U/L, bilirubin 34 μmol/L, creatinine 145 μmol/L (booking creatinine was 68 μmol/L), LDH 680 U/L. Urinalysis shows protein 3+. Peripheral blood film shows schistocytes. What is the most appropriate immediate management?
- A. Commence IV magnesium sulphate and plan delivery within 24-48 hours
- B. Commence IV labetalol, IV magnesium sulphate, and arrange immediate delivery (Correct Answer)
- C. Commence plasma exchange for thrombotic thrombocytopenic purpura
- D. Commence high-dose corticosteroids for HELLP syndrome
- E. Transfuse platelets and arrange delivery once platelets >100 × 10^9/L
Renal & Urology Explanation: ***Commence IV labetalol, IV magnesium sulphate, and arrange immediate delivery***
- The patient's presentation with headache, right upper quadrant pain, severe hypertension (168/112 mmHg), proteinuria, thrombocytopenia (platelets 88 × 10^9/L), elevated liver enzymes (ALT 245 U/L, AST 312 U/L), elevated LDH, elevated bilirubin, and **schistocytes** on peripheral blood film is highly indicative of **HELLP syndrome** (Hemolysis, Elevated Liver enzymes, Low Platelets) with severe pre-eclampsia and acute kidney injury.
- **Immediate delivery** is the definitive and most appropriate management for HELLP syndrome, especially given the severity and multi-organ involvement. **IV labetalol** is crucial for managing severe hypertension to prevent maternal stroke, and **IV magnesium sulphate** is essential for seizure prophylaxis in severe pre-eclampsia/HELLP.
*Commence IV magnesium sulphate and plan delivery within 24-48 hours*
- While **magnesium sulphate** is correctly indicated for seizure prophylaxis, delaying delivery for **24-48 hours** in the context of established HELLP syndrome with signs of organ dysfunction (AKI, severe liver dysfunction) is dangerous and can lead to severe maternal and fetal complications, including liver rupture, renal failure, or stroke.
- The critical nature of **HELLP syndrome** often requires delivery within hours of diagnosis and maternal stabilization, not prolonged expectant management.
*Commence plasma exchange for thrombotic thrombocytopenic purpura*
- Although both **TTP** and HELLP syndrome can present with microangiopathic hemolytic anemia and thrombocytopenia, the presence of severe **hypertension** and significant **proteinuria** in a pregnant woman points strongly towards HELLP syndrome.
- Initiating **plasma exchange**, which is the primary treatment for TTP, would be a misdiagnosis and critically delay the definitive treatment for HELLP syndrome, which is delivery, thereby increasing maternal and fetal morbidity and mortality.
*Commence high-dose corticosteroids for HELLP syndrome*
- While corticosteroids (e.g., dexamethasone) are sometimes used as an adjunct in HELLP syndrome to potentially improve platelet counts and liver enzyme levels, they are **not the definitive treatment** and do not replace the need for prompt delivery.
- The primary management for HELLP syndrome focuses on stabilizing the mother and then delivering the fetus and placenta; corticosteroids for maternal benefit are secondary and should not delay the primary intervention, though steroids for fetal lung maturity might be considered if time permits for delivery within 24-48 hours (which is not the case here given the severity).
*Transfuse platelets and arrange delivery once platelets >100 × 10^9/L*
- **Platelet transfusion** is generally reserved for platelet counts below 20-50 × 10^9/L, active bleeding, or prior to invasive procedures/delivery, rather than as a routine measure for a count of 88 × 10^9/L.
- Delaying delivery to achieve an arbitrary platelet count threshold of **>100 × 10^9/L** is inappropriate and unsafe in HELLP syndrome; the platelet count often only improves significantly post-delivery, and such a delay puts the mother at increased risk of complications like intracranial hemorrhage or abruptio placentae.
Renal & Urology UK Medical PG Question 7: A 38-year-old man with chronic kidney disease stage 5 (eGFR 10 mL/min/1.73m²) secondary to focal segmental glomerulosclerosis is being prepared for renal replacement therapy. He has preserved urine output of approximately 1500 mL per day. He works full-time as a teacher and wishes to minimize time spent on dialysis. Blood tests show: haemoglobin 108 g/L, potassium 5.1 mmol/L, phosphate 1.72 mmol/L, albumin 36 g/L. He has good manual dexterity and lives with his partner. Which renal replacement modality would be most appropriate to offer first?
- A. Continuous ambulatory peritoneal dialysis (CAPD)
- B. Automated peritoneal dialysis (APD) (Correct Answer)
- C. In-centre haemodialysis three times weekly
- D. Home haemodialysis
- E. Pre-emptive renal transplantation
Renal & Urology Explanation: ***Automated peritoneal dialysis (APD)***
- **APD** is ideal for a full-time teacher as it allows for **overnight dialysis cycles** while the patient sleeps, freeing up their entire day for work and other activities.
- The patient's **preserved residual urine output** (1500 mL/day) and **good manual dexterity** are strong indicators for successful home-based peritoneal dialysis, minimizing the impact on lifestyle.
*Continuous ambulatory peritoneal dialysis (CAPD)*
- **CAPD** requires several **manual exchanges** throughout the day, which would significantly interrupt a teacher's workday and classroom responsibilities.
- Although home-based, it offers less **lifestyle flexibility** and independence during waking hours compared to automated peritoneal dialysis.
*In-centre haemodialysis three times weekly*
- This option involves regular trips to a clinic for **4-hour sessions** three times a week, directly conflicting with the patient's desire to **minimize time spent on dialysis** and maintain full-time employment.
- **In-centre haemodialysis** is generally associated with a more rapid decline in **residual renal function** compared to peritoneal dialysis.
*Home haemodialysis*
- **Home haemodialysis** is a more complex and technically demanding modality, requiring **vascular access** (e.g., AV fistula) and extensive patient training, which could delay the initiation of therapy.
- It involves greater equipment setup and ongoing maintenance at home, which can be more **invasive and disruptive** to the patient's living environment than peritoneal dialysis.
*Pre-emptive renal transplantation*
- While **pre-emptive renal transplantation** is the preferred long-term treatment for CKD stage 5, it is contingent on **donor availability** and is not a dialysis modality to be offered as the initial RRT choice.
- The question specifically asks for an appropriate **renal replacement modality** (dialysis) to offer *first* as the patient prepares for RRT.
Renal & Urology UK Medical PG Question 8: A 71-year-old woman with type 2 diabetes and hypertension is admitted with sepsis secondary to pneumonia. On admission, her creatinine is 156 μmol/L (baseline 98 μmol/L two months ago). She is treated with IV fluids and antibiotics. On day 3, her creatinine rises to 298 μmol/L. Urinalysis shows: protein 2+, blood negative, leucocytes negative. Urine microscopy reveals muddy brown casts. Renal ultrasound shows normal-sized kidneys with no obstruction. What is the most likely diagnosis?
- A. Acute tubular necrosis (Correct Answer)
- B. Contrast-induced nephropathy
- C. Acute interstitial nephritis
- D. Pre-renal acute kidney injury
- E. Atheroembolic renal disease
Renal & Urology Explanation: ***Acute tubular necrosis***- The presence of **muddy brown casts** on urine microscopy is a pathognomonic finding for **acute tubular necrosis (ATN)**, indicating sloughing of renal tubular epithelial cells.- **Sepsis** is a common cause of **intrinsic AKI** through hypotension and inflammatory mediators, leading to ATN that typically does not resolve immediately with fluid resuscitation.*Contrast-induced nephropathy*- This typically presents as an acute rise in creatinine within **24-48 hours** following the administration of radiocontrast media, which is not mentioned in this patient's history.- While it can cause ATN, the clinical context of **sepsis secondary to pneumonia** provides a more direct etiology for the tubular injury.*Acute interstitial nephritis*- Usually triggered by medications (e.g., NSAIDs, antibiotics) and typically presents with **white cell casts**, pyuria, and sometimes a maculopapular rash or **eosinophilia**.- Urinalysis in this case was **negative for leucocytes**, making an inflammatory interstitial process significantly less likely than ATN.*Pre-renal acute kidney injury*- Pre-renal AKI is characterized by a rapid improvement in renal function following **volume resuscitation** and usually features a normal urinary sediment without casts.- The persistent rise in creatinine despite **IV fluids** and the presence of granular/muddy brown casts indicate progression from pre-renal states to **structural tubular damage**.*Atheroembolic renal disease*- This condition typically occurs after **vascular procedures** or catheterization, resulting in cholesterol emboli that cause livedo reticularis and peripheral eosinophilia.- The onset of renal failure is often more subacute compared to the rapid progression seen in **sepsis-induced ATN**, and muddy brown casts are not a characteristic feature.
Renal & Urology UK Medical PG Question 9: A 48-year-old woman with no significant past medical history presents to the emergency department with a 6-hour history of severe right loin pain. CT KUB confirms a 5 mm stone at the right pelviureteric junction with mild hydronephrosis. She is afebrile. Blood tests show: white cells 9.2 × 10^9/L, CRP 8 mg/L, creatinine 78 μmol/L. Urinalysis shows blood 3+, leucocytes 1+, nitrites negative. She has been given adequate analgesia with diclofenac and morphine. What is the most appropriate next step in her management?
- A. Discharge with analgesia, alpha-blocker, and follow-up in stone clinic (Correct Answer)
- B. Admit for IV antibiotics due to obstructive pyelonephritis
- C. Arrange urgent ureteroscopy and stone extraction within 48 hours
- D. Insert percutaneous nephrostomy for decompression
- E. Arrange extracorporeal shock wave lithotripsy (ESWL) within one week
Renal & Urology Explanation: ***Discharge with analgesia, alpha-blocker, and follow-up in stone clinic***
- This patient presents with **uncomplicated renal colic** as evidenced by the 5 mm stone, controlled pain, normal inflammatory markers, and absence of fever or signs of infection (afebrile, negative nitrites).
- Stones **less than 10 mm** (especially 5 mm) have a high rate of spontaneous passage, and **medical expulsive therapy (MET)** with an alpha-blocker like tamsulosin is recommended to facilitate this process.
*Admit for IV antibiotics due to obstructive pyelonephritis*
- There is no evidence of infection; the patient is **afebrile**, and **blood tests** (WBC 9.2, CRP 8) do not indicate significant systemic inflammation.
- **Obstructive pyelonephritis** is a medical emergency characterized by fever, flank pain, and signs of infection with obstruction, which are absent here.
*Arrange urgent ureteroscopy and stone extraction within 48 hours*
- Urgent invasive procedures like **ureteroscopy** are typically reserved for patients with **intractable pain**, signs of infection, acute kidney injury, or stones unlikely to pass spontaneously (e.g., larger stones).
- Given the small size of the stone (5 mm) and controlled pain, a trial of conservative management is more appropriate before considering invasive intervention.
*Insert percutaneous nephrostomy for decompression*
- **Percutaneous nephrostomy** is an invasive procedure indicated for urgent drainage of an **infected obstructed kidney**, severe hydronephrosis with renal impairment, or in patients with a solitary kidney.
- The patient has only **mild hydronephrosis** and no signs of infection or acute kidney injury, thus immediate decompression is not warranted.
*Arrange extracorporeal shock wave lithotripsy (ESWL) within one week*
- **ESWL** is an appropriate treatment for certain stone types and sizes, but for a small 5 mm stone, the chance of **spontaneous passage** with MET is high, making it the preferred initial approach.
- Proceeding directly to ESWL for a small, uncomplicated stone bypasses less invasive and potentially successful conservative management, incurring unnecessary costs and risks.
Renal & Urology UK Medical PG Question 10: A 52-year-old woman presents to the emergency department with confusion and agitation. Her husband reports she has had watery diarrhoea for 5 days. She has a history of bipolar disorder treated with lithium for 15 years. Blood tests show: sodium 128 mmol/L, potassium 3.2 mmol/L, creatinine 245 μmol/L (baseline 85 μmol/L), lithium level 2.8 mmol/L (therapeutic range 0.6-1.0). ECG shows sinus tachycardia at 105 bpm. What is the most appropriate immediate management?
- A. Stop lithium, give IV 0.9% saline, and arrange urgent haemodialysis (Correct Answer)
- B. Stop lithium, give IV 0.9% saline, and recheck lithium level in 12 hours
- C. Continue lithium, correct dehydration, and arrange gastroenterology review
- D. Stop lithium, give hypertonic saline for hyponatraemia, then arrange dialysis
- E. Stop lithium, give IV fluids, and start haemofiltration
Renal & Urology Explanation: ***Stop lithium, give IV 0.9% saline, and arrange urgent haemodialysis***- The patient presents with **severe lithium toxicity** (level 2.8 mmol/L) complicated by **Acute Kidney Injury (AKI)** and neurological symptoms like confusion and agitation.- **Haemodialysis** is indicated when lithium levels exceed 2.5 mmol/L in the presence of renal impairment or severe clinical toxicity, as it is the most efficient method for rapid clearance.*Stop lithium, give IV 0.9% saline, and recheck lithium level in 12 hours*- Waiting 12 hours to recheck levels is dangerous in a patient with **neurological symptoms** and **renal impairment**, as toxicity can be life-threatening.- While **IV normal saline** helps correct hypovolaemic hyponatraemia and promotes renal lithium excretion, it is insufficient as monotherapy for severe toxicity.*Continue lithium, correct dehydration, and arrange gastroenterology review*- **Lithium** must be stopped immediately; continuing it would worsen the toxic accumulation and risk permanent **neurotoxicity** or cardiac arrest.- Focusing on a gastroenterology review ignores the acute medical emergency of **lithium-induced encephalopathy** and renal failure.*Stop lithium, give hypertonic saline for hyponatraemia, then arrange dialysis*- **Hypertonic saline** is generally reserved for severe, symptomatic hyponatraemia with risk of cerebral oedema, whereas this patient’s sodium level will likely correct with **volume resuscitation**.- Delaying dialysis to manage mild-to-moderate hyponatraemia first is inappropriate when the primary threat is the high **lithium concentration**.*Stop lithium, give IV fluids, and start haemofiltration*- **Haemofiltration** is significantly less effective than **haemodialysis** for removing lithium because lithium is a small ion that is best cleared via diffusion.- Rapid clearance of high lithium levels in an emergency setting is the standard of care, making **intermittent haemodialysis** the preferred modality.
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