Which of these finding would not suggest CRF as opposed to ARF?

Correct Answer: D

Rationale: 10 cm kidneys (normal size) suggest ARF CRF shrinks kidneys (<9 cm) from scarring, not chronic. Anemia (erythropoietin loss), osteodystrophy (phosphate retention), and polyuria/nocturia (tubular damage) are CRF hallmarks chronic adaptation. Normal size distinguishes ARF, key to differentiating acuity, unlike chronic signs.

Correct Answer: D

Rationale: Iron doesn't typically cause ARF unlike rhabdomyolysis (myoglobin), NSAIDs (perfusion drop), and ethylene glycol (oxalate crystals), all established. Iron overload affects liver renal toxicity rare. Lack of nephrotoxicity distinguishes it, key to ARF differential, unlike proven renal insults.

Correct Answer: D

Rationale: Urethral prolapse doesn't typically cause postrenal failure rare obstruction (e.g., females), unlike bladder tumor (outflow block), phimosis (urethral), and neurogenic bladder (emptying failure). Minimal obstructive impact distinguishes it, key to postrenal etiology, unlike clear blockages.

Correct Answer: D

Rationale: Above 180 mg/dL (renal threshold), glucose filtration exceeds reabsorption capacity, increasing filtered and excreted amounts not fixed, equal, or absent in urine. This reflects glycosuria dynamics, key for diabetes monitoring, contrasting with normal reabsorption limits.

Correct Answer: A

Rationale: Cercarial dermatitis results from non-human schistosomes penetrating skin, not S. mansoni/haematobium (human parasites) or Trichomonas (STD). This distinguishes parasitic dermatitis, critical for epidemiology, contrasting with human-specific species.