The nurse is assessing a toddler with a large abdominal mass and pink-tinged urine in a diaper. The nurse would contact the provider to report which disorder?

A. Nephrotic Syndrome is incorrect because this condition typically presents with generalized edema, proteinuria, hypoalbuminemia, and hyperlipidemia, rather than a large, palpable abdominal mass or hematuria. B. Neuroblastoma is incorrect because while it can present with an abdominal mass, pink-tinged urine is less characteristic, and the mass may be firm, irregular, and may cross the midline. Neuroblastoma often presents with systemic symptoms such as fever, weight loss, or periorbital ecchymoses. C. Nephroblastoma is correct. Nephroblastoma, also known as Wilms’ tumor, is the most common renal malignancy in children. It typically presents with a painless, unilateral abdominal mass, sometimes accompanied by hematuria (pink-tinged urine), hypertension, or fever. Early identification and reporting are critical because manipulation of the mass can increase the risk of tumor rupture and metastasis. D. Constipation is incorrect because while it may cause abdominal distention, it does not cause hematuria or a firm, discrete abdominal mass, and would not explain the pink-tinged urine.