100 clinical case scenarios on Biochemistry

By | July 31, 2023

Case Scenario 1:
A 25-year-old male presents with fatigue, weakness, and pale skin. Laboratory findings reveal decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows target cells and basophilic stippling. What is the most likely diagnosis?
Answer: Iron deficiency anemia.

Case Scenario 2:
A 35-year-old woman presents with polyuria, polydipsia, and unintentional weight loss. Laboratory findings show hyperglycemia and ketonuria. Which enzyme deficiency is responsible for this patient’s condition?
Answer: Deficiency of insulin.

Case Scenario 3:
A 6-month-old infant presents with vomiting, failure to thrive, and developmental delay. Laboratory tests show elevated levels of phenylalanine in the blood. What is the most likely diagnosis?
Answer: Phenylketonuria (PKU).

Case Scenario 4:
A 50-year-old man with a history of alcohol abuse presents with confusion and tremors. Laboratory findings reveal elevated lactate levels. What is the underlying mechanism of lactate elevation?
Answer: Impaired conversion of lactate to pyruvate due to alcohol-induced inhibition of lactate dehydrogenase.

Case Scenario 5:
A 30-year-old female presents with muscle cramps and weakness. Her serum calcium levels are low, and her phosphorus levels are high. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 6:
A 40-year-old male presents with recurrent kidney stones. Laboratory tests show elevated levels of calcium and oxalate in the urine. Which enzyme deficiency is likely contributing to this patient’s condition?
Answer: Deficiency of oxalate decarboxylase.

Case Scenario 7:
A newborn presents with jaundice and dark urine. Laboratory findings show increased levels of unconjugated bilirubin in the blood. Which enzyme deficiency is responsible for this patient’s condition?
Answer: Deficiency of UDP-glucuronosyltransferase (UGT).

Case Scenario 8:
A 2-year-old child presents with seizures and developmental delay. Laboratory tests reveal elevated levels of branched-chain amino acids in the blood. What is the most likely diagnosis?
Answer: Maple syrup urine disease.

Case Scenario 9:
A 55-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 10:
A 20-year-old male presents with recurrent infections and easy bruising. Laboratory tests show prolonged bleeding time and reduced platelet count. Which vitamin deficiency is responsible for these findings?
Answer: Vitamin K deficiency.

Case Scenario 11:
A 45-year-old male presents with muscle cramps and tetany. Laboratory findings show decreased serum calcium levels and increased serum phosphorus levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 12:
A 28-year-old pregnant woman presents with weakness and paresthesias. Laboratory findings show decreased hemoglobin levels, elevated mean corpuscular volume (MCV), and hypersegmented neutrophils. What is the most likely diagnosis?
Answer: Folate deficiency anemia.

Case Scenario 13:
A 35-year-old male presents with confusion, irritability, and tremors. Laboratory findings show decreased serum glucose levels. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 14:
A 60-year-old male presents with memory loss and cognitive decline. Laboratory findings show increased levels of amyloid-beta in the brain. What is the underlying mechanism of amyloid-beta accumulation?
Answer: Abnormal cleavage of amyloid precursor protein (APP) by beta-secretase and gamma-secretase.

Case Scenario 15:
A 50-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) and lactate dehydrogenase (LDH) in the blood. What is the most likely diagnosis?
Answer: Myocardial infarction.

Case Scenario 16:
A 40-year-old male presents with excessive thirst, polyuria, and polydipsia. Laboratory findings show hyperglycemia and glycosuria. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 17:
A 25-year-old female presents with abdominal pain and yellowing of the skin. Laboratory tests show elevated levels of conjugated bilirubin in the blood. Which enzyme deficiency is responsible for this patient’s condition?
Answer: Deficiency of UDP-glucuronosyltransferase (UGT).

Case Scenario 18:
A 30-year-old male presents with recurrent kidney stones and bone pain. Laboratory findings show elevated levels of calcium and phosphate in the blood. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 19:
A 35-year-old female presents with muscle cramps and weakness. Her serum calcium levels are high, and her phosphorus levels are low. Which hormone excess is responsible for these findings?
Answer: Parathyroid hormone (PTH) excess.

Case Scenario 20:
A 60-year-old male presents with confusion, irritability, and hallucinations. Laboratory findings show decreased serum calcium levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 21:
A 25-year-old female presents with fatigue, shortness of breath, and pallor. Laboratory findings reveal decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows target cells and basophilic stippling. What is the most likely diagnosis?
Answer: Iron deficiency anemia.

Case Scenario 22:
A 35-year-old male presents with muscle cramps and tetany. Laboratory findings show decreased serum calcium levels and increased serum phosphorus levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 23:
A 40-year-old female presents with recurrent kidney stones. Laboratory tests show elevated levels of calcium and oxalate in the urine. Which enzyme deficiency is likely contributing to this patient’s condition?
Answer: Deficiency of oxalate decarboxylase.

Case Scenario 24:
A 50-year-old male with a history of alcohol abuse presents with confusion and tremors. Laboratory findings reveal elevated lactate levels. What is the underlying mechanism of lactate elevation?
Answer: Impaired conversion of lactate to pyruvate due to alcohol-induced inhibition of lactate dehydrogenase.

Case Scenario 25:
A 30-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 26:
A 20-year-old female presents with fatigue, palpitations, and shortness of breath. Laboratory findings show decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows anisocytosis and poikilocytosis. What is the most likely diagnosis?
Answer: Thalassemia.

Case Scenario 27:
A 25-year-old male presents with recurrent infections and easy bruising. Laboratory tests show prolonged bleeding time and reduced platelet count. Which vitamin deficiency is responsible for these findings?
Answer: Vitamin K deficiency.

Case Scenario 28:
A 35-year-old male presents with excessive thirst, polyuria, and polydipsia. Laboratory findings show hyperglycemia and glycosuria. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 29:
A 30-year-old female presents with muscle cramps and weakness. Her serum calcium levels are high, and her phosphorus levels are low. Which hormone excess is responsible for these findings?
Answer: Parathyroid hormone (PTH) excess.

Case Scenario 30:
A 40-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) and lactate dehydrogenase (LDH) in the blood. What is the most likely diagnosis?
Answer: Myocardial infarction.

Case Scenario 31:
A 45-year-old male presents with confusion, irritability, and tremors. Laboratory findings show decreased serum glucose levels. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 32:
A 50-year-old male presents with memory loss and cognitive decline. Laboratory findings show increased levels of amyloid-beta in the brain. What is the underlying mechanism of amyloid-beta accumulation?
Answer: Abnormal cleavage of amyloid precursor protein (APP) by beta-secretase and gamma-secretase.

Case Scenario 33:
A 55-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 34:
A 60-year-old male presents with confusion, irritability, and hallucinations. Laboratory findings show decreased serum calcium levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 35:
A 25-year-old female presents with fatigue, weakness, and pale skin. Laboratory findings reveal decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows target cells and basophilic stippling. What is the most likely diagnosis?
Answer: Iron deficiency anemia.

Case Scenario 36:
A 35-year-old male presents with muscle cramps and tetany. Laboratory findings show decreased serum calcium levels and increased serum phosphorus levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 37:
A 40-year-old female presents with recurrent kidney stones. Laboratory tests show elevated levels of calcium and oxalate in the urine. Which enzyme deficiency is likely contributing to this patient’s condition?
Answer: Deficiency of oxalate decarboxylase.

Case Scenario 38:
A 50-year-old male with a history of alcohol abuse presents with confusion and tremors. Laboratory findings reveal elevated lactate levels. What is the underlying mechanism of lactate elevation?
Answer: Impaired conversion of lactate to pyruvate due to alcohol-induced inhibition of lactate dehydrogenase.

Case Scenario 39:
A 30-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 40:
A 20-year-old female presents with fatigue, palpitations, and shortness of breath. Laboratory findings show decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows anisocytosis and poikilocytosis. What is the most likely diagnosis?
Answer: Thalassemia.

Case Scenario 41:
A 25-year-old male presents with recurrent infections and easy bruising. Laboratory tests show prolonged bleeding time and reduced platelet count. Which vitamin deficiency is responsible for these findings?
Answer: Vitamin K deficiency.

Case Scenario 42:
A 35-year-old male presents with excessive thirst, polyuria, and polydipsia. Laboratory findings show hyperglycemia and glycosuria. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 43:
A 30-year-old female presents with muscle cramps and weakness. Her serum calcium levels are high, and her phosphorus levels are low. Which hormone excess is responsible for these findings?
Answer: Parathyroid hormone (PTH) excess.

Case Scenario 44:
A 40-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) and lactate dehydrogenase (LDH) in the blood. What is the most likely diagnosis?
Answer: Myocardial infarction.

Case Scenario 45:
A 45-year-old male presents with confusion, irritability, and tremors. Laboratory findings show decreased serum glucose levels. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 46:
A 50-year-old male presents with memory loss and cognitive decline. Laboratory findings show increased levels of amyloid-beta in the brain. What is the underlying mechanism of amyloid-beta accumulation?
Answer: Abnormal cleavage of amyloid precursor protein (APP) by beta-secretase and gamma-secretase.

Case Scenario 47:
A 55-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 48:
A 60-year-old male presents with confusion, irritability, and hallucinations. Laboratory findings show decreased serum calcium levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 49:
A 25-year-old female presents with fatigue, weakness, and pale skin. Laboratory findings reveal decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows target cells and basophilic stippling. What is the most likely diagnosis?
Answer: Iron deficiency anemia.

Case Scenario 50:
A 35-year-old male presents with muscle cramps and tetany. Laboratory findings show decreased serum calcium levels and increased serum phosphorus levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 51:
A 40-year-old female presents with recurrent kidney stones. Laboratory tests show elevated levels of calcium and oxalate in the urine. Which enzyme deficiency is likely contributing to this patient’s condition?
Answer: Deficiency of oxalate decarboxylase.

Case Scenario 52:
A 50-year-old male with a history of alcohol abuse presents with confusion and tremors. Laboratory findings reveal elevated lactate levels. What is the underlying mechanism of lactate elevation?
Answer: Impaired conversion of lactate to pyruvate due to alcohol-induced inhibition of lactate dehydrogenase.

Case Scenario 53:
A 30-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 54:
A 20-year-old female presents with fatigue, palpitations, and shortness of breath. Laboratory findings show decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows anisocytosis and poikilocytosis. What is the most likely diagnosis?
Answer: Thalassemia.

Case Scenario 55:
A 25-year-old male presents with recurrent infections and easy bruising. Laboratory tests show prolonged bleeding time and reduced platelet count. Which vitamin deficiency is responsible for these findings?
Answer: Vitamin K deficiency.

Case Scenario 56:
A 35-year-old male presents with excessive thirst, polyuria, and polydipsia. Laboratory findings show hyperglycemia and glycosuria. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 57:
A 30-year-old female presents with muscle cramps and weakness. Her serum calcium levels are high, and her phosphorus levels are low. Which hormone excess is responsible for these findings?
Answer: Parathyroid hormone (PTH) excess.

Case Scenario 58:
A 40-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) and lactate dehydrogenase (LDH) in the blood. What is the most likely diagnosis?
Answer: Myocardial infarction.

Case Scenario 59:
A 45-year-old male presents with confusion, irritability, and tremors. Laboratory findings show decreased serum glucose levels. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 60:
A 50-year-old male presents with memory loss and cognitive decline. Laboratory findings show increased levels of amyloid-beta in the brain. What is the underlying mechanism of amyloid-beta accumulation?
Answer: Abnormal cleavage of amyloid precursor protein (APP) by beta-secretase and gamma-secretase.

Case Scenario 61:
A 55-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 62:
A 60-year-old male presents with confusion, irritability, and hallucinations. Laboratory findings show decreased serum calcium levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 63:
A 25-year-old female presents with fatigue, weakness, and pale skin. Laboratory findings reveal decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows target cells and basophilic stippling. What is the most likely diagnosis?
Answer: Iron deficiency anemia.

Case Scenario 64:
A 35-year-old male presents with muscle cramps and tetany. Laboratory findings show decreased serum calcium levels and increased serum phosphorus levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 65:
A 40-year-old female presents with recurrent kidney stones. Laboratory tests show elevated levels of calcium and oxalate in the urine. Which enzyme deficiency is likely contributing to this patient’s condition?
Answer: Deficiency of oxalate decarboxylase.

Case Scenario 66:
A 50-year-old male with a history of alcohol abuse presents with confusion and tremors. Laboratory findings reveal elevated lactate levels. What is the underlying mechanism of lactate elevation?
Answer: Impaired conversion of lactate to pyruvate due to alcohol-induced inhibition of lactate dehydrogenase.

Case Scenario 67:
A 30-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 68:
A 20-year-old female presents with fatigue, palpitations, and shortness of breath. Laboratory findings show decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows anisocytosis and poikilocytosis. What is the most likely diagnosis?
Answer: Thalassemia.

Case Scenario 69:
A 25-year-old male presents with recurrent infections and easy bruising. Laboratory tests show prolonged bleeding time and reduced platelet count. Which vitamin deficiency is responsible for these findings?
Answer: Vitamin K deficiency.

Case Scenario 70:
A 35-year-old male presents with excessive thirst, polyuria, and polydipsia. Laboratory findings show hyperglycemia and glycosuria. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 71:
A 30-year-old female presents with muscle cramps and weakness. Her serum calcium levels are high, and her phosphorus levels are low. Which hormone excess is responsible for these findings?
Answer: Parathyroid hormone (PTH) excess.

Case Scenario 72:
A 40-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) and lactate dehydrogenase (LDH) in the blood. What is the most likely diagnosis?
Answer: Myocardial infarction.

Case Scenario 73:
A 45-year-old male presents with confusion, irritability, and tremors. Laboratory findings show decreased serum glucose levels. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 74:
A 50-year-old male presents with memory loss and cognitive decline. Laboratory findings show increased levels of amyloid-beta in the brain. What is the underlying mechanism of amyloid-beta accumulation?
Answer: Abnormal cleavage of amyloid precursor protein (APP) by beta-secretase and gamma-secretase.

Case Scenario 75:
A 55-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 76:
A 60-year-old male presents with confusion, irritability, and hallucinations. Laboratory findings show decreased serum calcium levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 77:
A 25-year-old female presents with fatigue, weakness, and pale skin. Laboratory findings reveal decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows target cells and basophilic stippling. What is the most likely diagnosis?
Answer: Iron deficiency anemia.

Case Scenario 78:
A 35-year-old male presents with muscle cramps and tetany. Laboratory findings show decreased serum calcium levels and increased serum phosphorus levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 79:
A 40-year-old female presents with recurrent kidney stones. Laboratory tests show elevated levels of calcium and oxalate in the urine. Which enzyme deficiency is likely contributing to this patient’s condition?
Answer: Deficiency of oxalate decarboxylase.

Case Scenario 80:
A 50-year-old male with a history of alcohol abuse presents with confusion and tremors. Laboratory findings reveal elevated lactate levels. What is the underlying mechanism of lactate elevation?
Answer: Impaired conversion of lactate to pyruvate due to alcohol-induced inhibition of lactate dehydrogenase.

Case Scenario 81:
A 30-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 82:
A 20-year-old female presents with fatigue, palpitations, and shortness of breath. Laboratory findings show decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows anisocytosis and poikilocytosis. What is the most likely diagnosis?
Answer: Thalassemia.

Case Scenario 83:
A 25-year-old male presents with recurrent infections and easy bruising. Laboratory tests show prolonged bleeding time and reduced platelet count. Which vitamin deficiency is responsible for these findings?
Answer: Vitamin K deficiency.

Case Scenario 84:
A 35-year-old male presents with excessive thirst, polyuria, and polydipsia. Laboratory findings show hyperglycemia and glycosuria. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 85:
A 30-year-old female presents with muscle cramps and weakness. Her serum calcium levels are high, and her phosphorus levels are low. Which hormone excess is responsible for these findings?
Answer: Parathyroid hormone (PTH) excess.

Case Scenario 86:
A 40-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) and lactate dehydrogenase (LDH) in the blood. What is the most likely diagnosis?
Answer: Myocardial infarction.

Case Scenario 87:
A 45-year-old male presents with confusion, irritability, and tremors. Laboratory findings show decreased serum glucose levels. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 88:
A 50-year-old male presents with memory loss and cognitive decline. Laboratory findings show increased levels of amyloid-beta in the brain. What is the underlying mechanism of amyloid-beta accumulation?
Answer: Abnormal cleavage of amyloid precursor protein (APP) by beta-secretase and gamma-secretase.

Case Scenario 89:
A 55-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 90:
A 60-year-old male presents with confusion, irritability, and hallucinations. Laboratory findings show decreased serum calcium levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 91:
A 25-year-old female presents with fatigue, weakness, and pale skin. Laboratory findings reveal decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows target cells and basophilic stippling. What is the most likely diagnosis?
Answer: Iron deficiency anemia.

Case Scenario 92:
A 35-year-old male presents with muscle cramps and tetany. Laboratory findings show decreased serum calcium levels and increased serum phosphorus levels. Which hormone deficiency is responsible for these findings?
Answer: Parathyroid hormone (PTH) deficiency.

Case Scenario 93:
A 40-year-old female presents with recurrent kidney stones. Laboratory tests show elevated levels of calcium and oxalate in the urine. Which enzyme deficiency is likely contributing to this patient’s condition?
Answer: Deficiency of oxalate decarboxylase.

Case Scenario 94:
A 50-year-old male with a history of alcohol abuse presents with confusion and tremors. Laboratory findings reveal elevated lactate levels. What is the underlying mechanism of lactate elevation?
Answer: Impaired conversion of lactate to pyruvate due to alcohol-induced inhibition of lactate dehydrogenase.

Case Scenario 95:
A 30-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) in the blood. What is the most likely diagnosis?
Answer: Muscular dystrophy.

Case Scenario 96:
A 20-year-old female presents with fatigue, palpitations, and shortness of breath. Laboratory findings show decreased hemoglobin levels and microcytic, hypochromic red blood cells. Peripheral blood smear shows anisocytosis and poikilocytosis. What is the most likely diagnosis?
Answer: Thalassemia.

Case Scenario 97:
A 25-year-old male presents with recurrent infections and easy bruising. Laboratory tests show prolonged bleeding time and reduced platelet count. Which vitamin deficiency is responsible for these findings?
Answer: Vitamin K deficiency.

Case Scenario 98:
A 35-year-old male presents with excessive thirst, polyuria, and polydipsia. Laboratory findings show hyperglycemia and glycosuria. Which hormone deficiency is responsible for these findings?
Answer: Insulin deficiency.

Case Scenario 99:
A 30-year-old female presents with muscle cramps and weakness. Her serum calcium levels are high, and her phosphorus levels are low. Which hormone excess is responsible for these findings?
Answer: Parathyroid hormone (PTH) excess.

Case Scenario 100:
A 40-year-old female presents with muscle weakness and fatigue. Laboratory findings reveal elevated levels of creatine kinase (CK) and lactate dehydrogenase (LDH) in the blood. What is the most likely diagnosis?
Answer: Myocardial infarction.

Please note that these case scenarios are intended for educational purposes only and should not be used for medical diagnosis or treatment. Always consult a qualified healthcare professional for accurate assessment and management of medical conditions.