What condition is suggested by severe left-sided back pain that radiates into the groin and blood in the urine?

Severe left-sided back pain that radiates into the groin, accompanied by blood in the urine, is highly suggestive of a kidney stone. This is due to the characteristic nature of kidney stones, also known as renal calculi, which can cause intense pain, often referred to as renal colic. The pain typically originates in the flank area and may radiate down towards the groin as the stone moves through the urinary tract.

The presence of hematuria, or blood in the urine, is another hallmark of kidney stones, as the stone can cause irritation or injury to the lining of the urinary tract during its passage. This condition is characterized by a triad of symptoms: severe pain, hematuria, and sometimes nausea or vomiting.

Other conditions like urinary tract infections can cause similar symptoms such as back pain and hematuria, but they usually present with additional signs such as dysuria (painful urination) or increased urinary frequency, which are not mentioned in this scenario. Appendicitis generally presents with abdominal pain, typically starting around the umbilicus and later shifting to the right lower quadrant, rather than producing flank pain. Ovarian cysts may also cause pain, but they typically do not present with