A rare, hereditary, hemolytic anemia due to a red cell membrane anomaly characterized by fatigue, mild anemia and pseudohyperkalemia due to a potassium leak from the red blood cells. A hallmark of this condition is that red blood cells lyse on storage at 4 degrees centigrade. The disease is MONDO_0008494 (cryohydrocytosis). Also known as: CHC, hereditary cryohydrocytosis with normal stomatin, stomatocytosis, cold-sensitive.