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Microhematuria, also called microscopic hematuria (both usually abbreviated as MH), is a medical condition in which urine contains small amounts of blood; the blood quantity is too low to change the color of the urine (otherwise, it is known as gross hematuria).
Infection. In some cases, loin pain-haematuria syndrome occurs after a bladder infection with involvement of the kidney. Even when the infection has been treated and bugs can no longer be found in the urine, pain may persist for 6 months, or even longer in some cases. "Classic loin pain-haematuria syndrome".
Hematuria or haematuria is defined as the presence of blood or red blood cells in the urine. [1] "Gross hematuria" occurs when urine appears red, brown, or tea-colored due to the presence of blood. Hematuria may also be subtle and only detectable with a microscope or laboratory test. [2]
Microscopic haematuria and hypertension may also be seen. Can also lead to thrombotic complications such as renal vein thromboses or pulmonary emboli. [14] Kidney failure is uncommon. [13] Class VI: Advanced sclerosing lupus nephritis. [7] Global sclerosis involving more than 90% of glomeruli, and represents healing of prior inflammatory injury.
Hemoglobinuria is a condition in which the oxygen transport protein hemoglobin is found in abnormally high concentrations in the urine. [1] The condition is caused by excessive intravascular hemolysis, in which large numbers of red blood cells (RBCs) are destroyed, thereby releasing free hemoglobin into the plasma. [2]
The lysed red blood cells release free hemoglobin into the bloodstream, overwhelming hemoglobin binding proteins such as albumin, haptoglobin, and hemopexin, with the excess free hemoglobin leading to renal vasoconstriction (via nitric oxide scavenging), which then leads to acute tubular necrosis and acute kidney injury.
In diseases such as hemolytic uremic syndrome, disseminated intravascular coagulation, thrombotic thrombocytopenic purpura, and malignant hypertension, the endothelial layer of small vessels is damaged with resulting fibrin deposition and platelet aggregation.
Hemorrhagic cystitis or haemorrhagic cystitis is an inflammation of the bladder defined by lower urinary tract symptoms that include dysuria, hematuria, and hemorrhage.The disease can occur as a complication of cyclophosphamide, ifosfamide and radiation therapy.