Renal & Urology

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 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 3: 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 4: 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 5: 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 Flashcard 1 of 5

Question: Acute kidney injury pathophysiology: 1. _____ 2. Intra-renal 3. Post-renal

Answer: Pre-renal

Renal & Urology Flashcard 2 of 5

Question: Intra-renal AKI is most commonly caused by ischaemic & nephrotoxic _____

Answer: acute tubular necrosis

Renal & Urology Flashcard 3 of 5

Question: The mechanism of Oxybutynin is _____

Answer: Anti-muscarinic

Renal & Urology Flashcard 4 of 5

Question: bf436201fdd2467bb4524075c13428c5-ao-2

Answer:

Renal & Urology Flashcard 5 of 5

Question: Carcinoma in situ (CIS) is managed with _____

Answer: TURBT