All of the following statements regarding primary mediastinal nonseminomatous germ cell tumours (NSGCTs) are true, except

Correct Answer: A

Rationale: Primary mediastinal NSGCTs aren't more chemo-sensitive poor response, worse prognosis than testicular NSGCTs false. Poor prognosis true, aggressive. Yolk sac components common correct, marker rise. Klinefelter link accurate, genetic risk. Lower chemo sensitivity distinguishes the error, key to its challenging management, unlike prognosis, histology, or association truths.

Correct Answer: C

Rationale: Prophylaxis for hydronephrosis uses half therapeutic dose prevents UTI (e.g., amoxicillin neonates, TMP-SMX >2 months), true. Amoxicillin fits neonates correct. TMP-SMX suits older infants standard. Evening dosing aids compliance accurate. Half-dose distinguishes it, key to prophylaxis strategy, unlike drug or timing options all true.

Correct Answer: D

Rationale: IPSS assesses LUTS frequency, urgency, incomplete voiding (storage/voiding symptoms) but not dysuria (pain), which is infection/inflammation-related, not BPH-focused. Frequency (how often), urgency (sudden need), and incomplete voiding (residual) quantify obstruction/irritation. Dysuria's exclusion distinguishes IPSS, critical for symptom scoring, unlike pain inclusion.

Correct Answer: D

Rationale: Morbid obesity isn't a contraindication for laparoscopic surgery challenging but feasible with adjustments (e.g., trocar placement), not absolute. Hemodynamic instability risks collapse absolute no. Intestinal obstruction causes distension unsafe pneumoperitoneum. Increased intracranial pressure worsens with COâ‚‚ insufflation dangerous. Obesity's manageability distinguishes it, key to surgical candidacy, unlike life-threatening or mechanical barriers.

Correct Answer: C

Rationale: Uric acid concentrates in urine as a waste product, unlike glucose (reabsorbed), sodium (regulated), or phosphate (variable). This highlights excretory priority, vital for purine metabolism, contrasting with reabsorbed substances.