Final answer:
Wilms tumor, or nephroblastoma, is typically identified by a palpable abdominal mass that is smooth and firm, often accompanied by symptoms like abdominal pain, vomiting, and constipation.
Step-by-step explanation:
The abdominal exam finding of Wilms tumor (nephroblastoma) typically includes a palpable abdominal mass that is smooth and firm. The mass may be large and is often noted on one side of the abdomen, although it can sometimes be bilateral. Wilms tumors can also present with other symptoms such as abdominal pain, vomiting, and constipation. It's important to note that certain genetic syndromes and familial predispositions can increase the risk of developing this type of kidney cancer in children. Additionally, due to its location in the retroperitoneal space, symptoms can be subtle at first, making it crucial to investigate any persistent abdominal swelling or discomfort in children.