Snapshot A 33-year-old female is referred to a neurologist by her primary care physician for unsteady gate, forgetfullness, and recent episodes of Terret-like spells where she will fling one arm out and above her head seemingly unprovoked. One physical exam, the neurologist notices that her irises appear multicolored with concentric rings around the perpiphery. He is concerned for a metabolic disease and orders several laboratory and radiologic studies. In the interim he has advised her to avoid eating chocolate and shellfish. Introduction Free copper accumulation in many tissues (liver, brain, cornea, joints) also known as hepatolenticular degeneration mutation in ATP7B results in inadequate copper excretion by liver into bile failure of copper to enter circulation bound to ceruloplasmin ceruloplasmin is the transport protein for copper (like transferrin for Fe) copper bound to ceruloplasmin normally represents the largest fraction of copper in the body free copper generates free radicals that damage tissues see Metabolism of copper topic AR inheritance Presentation Symptoms Parkinson-like symptoms secondary to copper desposits in putamen hemiballismus secondary to copper desposits in subthalamic nucleus dementia secondary to copper desposits in cerebral cortex Physical exam cirrhosis corneal deposits on slit lamp examination Kayser-Fleischer rings RARELY seen in other conditions that may result in increased copper such as primary billiary cirrhosis Evaluation Labs ↓ total serum copper due to ↓ ceruloplasmin ↑ serum non-ceruloplasmin bound copper ↑ urine/serum free copper hemolytic anemia Liver Biopsy If performed will show increased hepatic copper Treatment Medical ammonium tetrathiomolybdate facilitates urinary excretion of copper penicillamine copper chelating agent trientine copper chelating agent zinc competes with copper for absorbtion in the gut via the same transporter Surgical Consider liver transplantation as clinical condition deteriorates Prognosis, Prevention, and Complications At risk for liver disease hepatitis cirrhosis carcinoma (hepatocellular) Also at risk for Fanconi's disease of the proximal tubules
QUESTIONS 1 of 5 1 2 3 4 5 Previous Next Lab Values Blood Hematologic Cerebrospinal Sweat, Urine, and BMI Blood, Plasma, Serum Reference Range ALT 8-20 U/L Amylase, serum 25-125 U/L AST 8-20 U/L Bilirubin, serum (adult) Total // Direct 0.1-1.0 mg/dL // 0.0-0.3 mg/dL Calcium, serum (Ca2+) 8.4-10.2 mg/dL Cholesterol, serum Rec: < 200 mg/dL Cortisol, serum 0800 h: 5-23 μg/dL //1600 h: 3-15 μg/dL 2000 h: ≤ 50% of 0800 h Creatine kinase, serum Male: 25-90 U/LFemale: 10-70 U/L Creatinine, serum 0.6-1.2 mg/dL Electrolytes, serum Sodium (Na+) 136-145 mEq/L Chloride (Cl-) 95-105 mEq/L Potassium (K+) 3.5-5.0 mEq/L Bicarbonate (HCO3-) 22-28 mEq/L Magnesium (Mg2+) 1.5-2.0 mEq/L Estriol, total, serum (in pregnancy) 24-28 wks // 32-36 wks 30-170 ng/mL // 60-280 ng/mL 28-32 wk // 36-40 wks 40-220 ng/mL // 80-350 ng/mL Ferritin, serum Male: 15-200 ng/mLFemale: 12-150 ng/mL Follicle-stimulating hormone, serum/plasma Male: 4-25 mIU/mL Female: premenopause: 4-30 mIU/mL midcycle peak: 10-90 mIU/mL postmenopause: 40-250 pH 7.35-7.45 PCO2 33-45 mmHg PO2 75-105 mmHg Glucose, serum Fasting: 70-110 mg/dL2-h postprandial:<120 mg/dL Growth hormone - arginine stimulation Fasting: <5 ng/mLProvocative stimuli: > 7ng/mL Immunoglobulins, serum IgA 76-390 mg/dL IgE 0-380 IU/mL IgG 650-1500 mg/dL IgM 40-345 mg/dL Iron 50-170 μg/dL Lactate dehydrogenase, serum 45-90 U/L Luteinizing hormone, serum/plasma Male: 6-23 mIU/mL Female: follicular phase: 5-30 mIU/mL midcycle: 75-150 mIU/mL postmenopause 30-200 mIU/mL Osmolality, serum 275-295 mOsmol/kd H2O Parathyroid hormone, serume, N-terminal 230-630 pg/mL Phosphatase (alkaline), serum (p-NPP at 30° C) 20-70 U/L Phosphorus (inorganic), serum 3.0-4.5 mg/dL Prolactin, serum (hPRL) < 20 ng/mL Proteins, serum Total (recumbent) 6.0-7.8 g/dL Albumin 3.5-5.5 g/dL Globulin 2.3-3.5 g/dL Thyroid-stimulating hormone, serum or plasma .5-5.0 μU/mL Thyroidal iodine (123I) uptake 8%-30% of administered dose/24h Thyroxine (T4), serum 5-12 μg/dL Triglycerides, serum 35-160 mg/dL Triiodothyronine (T3), serum (RIA) 115-190 ng/dL Triiodothyronine (T3) resin uptake 25%-35% Urea nitrogen, serum 7-18 mg/dL Uric acid, serum 3.0-8.2 mg/dL Hematologic Reference Range Bleeding time 2-7 minutes Erythrocyte count Male: 4.3-5.9 million/mm3Female: 3.5-5.5 million mm3 Erythrocyte sedimentation rate (Westergren) Male: 0-15 mm/hFemale: 0-20 mm/h Hematocrit Male: 41%-53%Female: 36%-46% Hemoglobin A1c ≤ 6 % Hemoglobin, blood Male: 13.5-17.5 g/dLFemale: 12.0-16.0 g/dL Hemoglobin, plasma 1-4 mg/dL Leukocyte count and differential Leukocyte count 4,500-11,000/mm3 Segmented neutrophils 54%-62% Bands 3%-5% Eosinophils 1%-3% Basophils 0%-0.75% Lymphocytes 25%-33% Monocytes 3%-7% Mean corpuscular hemoglobin 25.4-34.6 pg/cell Mean corpuscular hemoglobin concentration 31%-36% Hb/cell Mean corpuscular volume 80-100 μm3 Partial thromboplastin time (activated) 25-40 seconds Platelet count 150,000-400,000/mm3 Prothrombin time 11-15 seconds Reticulocyte count 0.5%-1.5% of red cells Thrombin time < 2 seconds deviation from control Volume Plasma Male: 25-43 mL/kgFemale: 28-45 mL/kg Red cell Male: 20-36 mL/kgFemale: 19-31 mL/kg Cerebrospinal Fluid Reference Range Cell count 0-5/mm3 Chloride 118-132 mEq/L Gamma globulin 3%-12% total proteins Glucose 40-70 mg/dL Pressure 70-180 mm H2O Proteins, total < 40 mg/dL Sweat Reference Range Chloride 0-35 mmol/L Urine Calcium 100-300 mg/24 h Chloride Varies with intake Creatinine clearance Male: 97-137 mL/minFemale: 88-128 mL/min Estriol, total (in pregnancy) 30 wks 6-18 mg/24 h 35 wks 9-28 mg/24 h 40 wks 13-42 mg/24 h 17-Hydroxycorticosteroids Male: 3.0-10.0 mg/24 hFemale: 2.0-8.0 mg/24 h 17-Ketosteroids, total Male: 8-20 mg/24 hFemale: 6-15 mg/24 h Osmolality 50-1400 mOsmol/kg H2O Oxalate 8-40 μg/mL Potassium Varies with diet Proteins, total < 150 mg/24 h Sodium Varies with diet Uric acid Varies with diet Body Mass Index (BMI) Adult: 19-25 kg/m2 Calculator ( ) xy AC 7 8 9 ÷ 4 5 6 × 1 2 3 - 0 . = + Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (M1.GI.138) A 31-year-old male with cirrhosis, dementia, and Parkinson-like symptoms is diagnosed with a hereditary metabolic disease resulting from the accumulation of a certain metal in various tissues. Impairment of which of the following elimination pathways is most likely responsible? Review Topic QID: 101195 1 Secretion into bile 71% (30/42) 2 Loop of Henle secretion into lumen of kidney 10% (4/42) 3 Glomerular filtration 12% (5/42) 4 Bleeding 0% (0/42) 5 Duodenal secretion 7% (3/42) M1 Select Answer to see Preferred Response PREFERRED RESPONSE 1 (M1.GI.114) A 14-year-old Caucasian male patient found to have low serum copper, high urine copper, and low serum ceruloplasmin is placed on penicillamine for management of his genetic disorder. Which of the following is LEAST consistent with this patient's clinical picture? Review Topic QID: 101171 1 Kinky, easily breakable hair 80% (16/20) 2 Cirrhosis 0% (0/20) 3 Hemiballismus 10% (2/20) 4 Corneal deposits 0% (0/20) 5 Parkinson-like symptoms 10% (2/20) M1 Select Answer to see Preferred Response PREFERRED RESPONSE 1 (M1.GI.168) A 15-year-old Caucasian female presents with Parkinson-like symptoms. Serum analysis shows increased levels of free copper and elevated liver enzymes. What test would prove most helpful in diagnosing the patient's underlying disease? Review Topic QID: 101225 1 Serum detection of anti-myelin antibodies 0% (0/20) 2 Slit lamp examination 90% (18/20) 3 Vitamin B12 test 0% (0/20) 4 CT scan 5% (1/20) 5 Reflex test 0% (0/20) M1 Select Answer to see Preferred Response PREFERRED RESPONSE 2 Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK