Final Answer:
The symptoms of flank pain and gross hematuria are indicative of nephrolithiasis, which is commonly known as kidney stones.
Envelope Shaped = Renal Colic
Step-by-step explanation:
Flank pain, which is pain felt in the upper back or side, and gross hematuria, which is the presence of large amounts of blood in the urine, are common symptoms of nephrolithiasis, also known as kidney stones. However, there is another condition that shares these symptoms, and that is renal colic. Renal colic refers to the intense and severe pain that accompanies the passage of a kidney stone through the ureter.
The pain can be so severe that it is often described as "envelope shaped," meaning it feels like an envelope being pushed through the body. This intense pain is a result of the stone's movement causing spasms in the ureter, which can be incredibly painful. While both nephrolithiasis and renal colic can cause flank pain and gross hematuria, renal colic is characterized by its distinctive "envelope shaped" pain pattern.
Therefore, in cases where flank pain and gross hematuria are present, healthcare providers may suspect both nephrolithiasis and renal colic. However, the presence of "envelope shaped" pain would suggest a diagnosis of renal colic over nephrolithiasis.