A Dark-Brown Serum Sample

Rainbow of colors: Inspissated bile syndrome secondary to hemolytic disease of the newborn and concomitant serum dynamics

The recent clinical experience with hemolytic disease of the newborn and its post-icteric sequelae is limited among high-income countries because of nearly over four decades of effective prevention care. In this case, we will discuss the sequelae of a baby born with hemolytic disease of the newborn to an Rh negative mother with no prenatal care from remote northern Saskatchewan. Inspissated bile syndrome is a rare but serious complication of hemolytic disease of the newborn. The concentration of hemolytic products parallels with serum color changes.

Dark brown serum and plasma samples: a case report

This case report describes occurrence of unusual, dark brown coloration of citrate plasma and serum samples in a female 68 years old patient admitted into Emergency department (ED). Patient complained of nausea and vomiting, fever up to 38.9°C, colicky pain in abdomen, diminished urinary output and yellowish skin tone. Her medical history included arterial hypertension, hypothyroidism and facial squamous cell carcinoma. For previous two years, she was treated with tuberculostatic therapy for Mycobacterium avium positive interstitial lung disease. Regular follow-up showed no signs of active disease. Upon admission to ED, complete blood count (CBC) analysis showed low red blood count (RBC) (3.76 x10¹²/L (reference interval (RI) 3.86 – 5.08 x10¹²/L)), low haemoglobin (Hb) concentration (111 g/L (RI 119 - 157 g/L)) and low haematocrit (Hct) (0.310 L/L (RI 0.360 – 0.470 L/L)). Biochemistry analytes were high, with foremost lactate dehydrogenase (LD) activity (2900 U/L, RI < 240 U/L). After communication with the clinician, methaemoglobin measured in arterial blood gas sample was reported. Patient was admitted to the Intensive care unit and upon reflex testing of haptoglobin, intravascular haemolysis was confirmed. This case indicates that every case of brown coloration of the serum must be promptly communicated to the clinician. Reflex testing assured timely diagnosis and favourable patient outcome.