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Environmental Medicine: Integrating a Missing Element into Medical Education
C Case Studies in Environmental Medicine
This appendix contains 55 case studies from peer reviewed literature, including journal articles and educational material developed by the Agency for Toxic Substances and Disease Registry (ATSDR). They were selected for their clinical interest with respect to environmental factors and health, relevance to particular courses and clerkships in medical school, and illustrative potential for teaching medical school students about the impact of the environment on health.
Four indexes are included in this appendix to help guide the reader in the use of the case studies. Index 1 lists the case studies according to agent or condition (in alphabetical order). Index 2 presents the case studies in terms of the most common medical school courses and clerkships where they might be used. Creative teachers and students, however, may find these case studies helpful in other educational settings and courses/clerkships as well. Index 3 presents the case studies in terms of sentinel pathophysiological conditions, and Index 4 presents the case studies according to common clinical signs, symptoms, and presenting complaints. Taken together, these indexes should help the reader recognize the many opportunities for enhancing knowledge, skills, and abilities in environmental medicine, and integrating an enhancement of environmental medicine in medical education.
The ATSDR case studies included in this appendix are part of a series of self-instructional publications designed to increase the primary provider’s knowledge of hazardous substances in the environment and to aid in the evaluation of potentially exposed patients. Original copies of the ATSDR cases contained in this appendix and others in the series can be obtained from: Continuing Education Coordinator, ATSDR, Division of Health Education (E33), 1600 Clifton Road, N.E., Atlanta, GA 30333.
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Environmental Medicine: Integrating a Missing Element into Medical Education
INDEX 1: Case Studies Related to Chemical Agents and Conditions
Agent
Case Study Title
Case Study No.
Arsenic
Arsenic Toxicity
1
Seasonal Arsenic Exposure from Burning Chromium-Copper-Arsenate-Treated Wood
2
Asbestos
Asbestos Toxicity
3
Benzene
Benzene Toxicity
4
Beryllium
Beryllium Toxicity
5
Cadmium
Cadmium Toxicity
6
Carbon Monoxide
Fetal Death Due to Nonlethal Maternal Carbon Monoxide Poisoning
7
Carbon Tetrachloride
Carbon Tetrachloride Toxicity
8
Chlordane
Chlordane Toxicity
9
Chlorine Gas
Chronic Reactive Airway Disease Following Acute Chlorine Gas Exposure in an Asymptomatic Atopic Patient
10
Chromium
Chromium Toxicity
11
Cyanide
Cyanide Toxicity
12
Dioxin
Dioxin Toxicity
13
Ethylene/Propylene Glycol
Ethylene/Propylene Glycol Toxicity
14
Formalin
Formalin Asthma in Hospital Staff
15
Gasoline
Gasoline Toxicity
16
Hantavirus
Hantavirus Pulmonary Syndrome: A Clinical Description of 17 Patients with a Newly Recognized Disease
17
Lead
Lead Poisoning from Mobilization of Bone Stores During Thyrotoxicosis
18
Lead Toxicity
19
Legionella
Legionnaires’ Disease: Description of an Epidemic of Pneumonia
20
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Environmental Medicine: Integrating a Missing Element into Medical Education
Agent
Case Study Title
Case Study No.
Mercury
Mercury in House Paint as a Cause of Acrodynia: Effect of Therapy with N-Acetyl-D, L-Penicillamine
21
Mercury Toxicity
22
Methanol
Methanol Toxicity
23
Methylene Chloride
Methylene Chloride Toxicity
24
Paint Remover Hazard
25
Nitrates/Nitrites
Fatal Outcome of Methemoglobinemia in an Infant
26
Nitrate/Nitrite Toxicity
27
Nitrogen Dioxide
An Outbreak of Nitrogen Dioxide-Induced Respiratory Illness Among Ice Hockey Players
28
Pentachlorophenol
Pentachlorophenol Toxicity
29
Pesticides
Aldicarb Poisoning: A Case Report with Prolonged Cholinesterase Inhibition and Improvement After Pralidoxime Therapy
30
Cholinesterase-Inhibiting Pesticide Toxicity
31
Infertility in Male Pesticide Workers
32
Pesticide Food Poisoning from Contaminated Watermelons in California, 1985
33
Poisoning of an Urban Family Due to Misapplication of Household Organophosphate and Carbamate Pesticides
34
Polynuclear Aromatic Hydrocarbon (PAH)
Polynuclear Aromatic Hydrocarbon (PAH) Toxicity
35
Polychlorinated Biphenyl (PCB)
Polychlorinated Biphenyl (PCB) Toxicity
36
Radiation
Ionizing Radiation
37
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Environmental Medicine: Integrating a Missing Element into Medical Education
Agent
Case Study Title
Case Study No.
Radon
Radon Toxicity
38
Radon
Residential Radon Exposure and Lung Cancer in Sweden
39
Soybean Dust
Community Outbreaks of Asthma Associated with Inhalation of Soybean Dust
40
Tetrachloroethylene
Tetrachloroethylene Toxicity
41
Toluene
Toluene Toxicity
42
Toluene Diisocyanate
Occupational Asthma Due to Toluene Diisocyanate Among Velcro-like Tape Manufacturers
43
1,1,1-Trichloroethane
1,1,1-Trichloroethane
44
Trimethyltin
Trimethyltin Encephalopathy
45
Trichloroethylene
Trichloroethylene Toxicity
46
Vinyl Chloride
Vinyl Chloride Toxicity
47
Condition
Case Study Title
Case Study No.
Carpel Tunnel Syndrome
Work-Related Disorders of the Neck and Upper Extremity
48
Dermatitis
Contact Dermatitis in Surgeons from Methylmethacrylate Bone Cement
49
Skin Lesions and Environmental Exposures: Rash Decisions
50
Hearing Loss
Acoustic Trauma Caused by the Telephone: A Report of Two Cases
51
Behavioral and Audiologic Manifestations of Noise-Induced Hearing Loss
52
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Environmental Medicine: Integrating a Missing Element into Medical Education
Condition
Case Study Title
Case Study No.
Reproductive and Developmental Effects
Reproductive and Developmental Hazards
53
See also Lead, Pesticides, and Radiation
18, 19, 32, 37
Respiratory Conditions
Childhood Asthma and Indoor Environmental Risk Factors
54
Populations at Risk From Particulate Air Pollution—United States, 1992
55
See also Chlorine Gas, Formalin, Hantavirus, Legionella, Soybean Dust, and Toluene Diisocyanate
10, 15, 17, 20, 40, 43
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Environmental Medicine: Integrating a Missing Element into Medical Education
INDEX 2: Selected Case Studies Related to Common Medical School Courses and Clerkships/Clinical Rotations
Selected Courses
Selected Case Studies
Biochemistry and Physiology
7, 12, 18, 19, 24, 25, 26, 27, 29, 35, 36
Community Medicine/Public Health
17, 20, 30, 31, 32, 33, 34, 38, 39, 40, 54, 55
Epidemiology and Biostatistics
17, 20, 31, 32, 33, 38, 39, 40, 54, 55
Genetics
29, 37, 38
Introduction to Clinical Medicine
See Appendix A
Microbiology
17, 20
Neuroscience
1, 2, 8, 9, 18, 19, 21, 22, 23, 24, 30, 31, 33, 34, 41, 42, 45, 48
Nutrition
2, 6, 18, 33
Pathology
3, 4, 8, 37, 38
Pharmacology
4, 7, 8, 12, 16, 18, 19, 26, 27, 28, 30, 31, 33, 34
Selected Clerkships/Clinical Rotations
Selected Case Studies
Cardiovascular Medicine
7, 12, 19, 23, 24, 25, 26, 27, 29, 30, 31, 33, 34
Dermatology
1, 2, 11, 13, 21, 22, 29, 36, 49, 50
Emergency Medicine
2, 7, 10, 12, 30, 31, 33, 34
Endocrinology
18, 32
Family Medicine
1, 2, 3, 4, 5, 8, 11, 13, 14, 15, 17, 18, 19, 20, 21, 22, 24, 26, 27, 28, 30, 31, 32, 33, 34, 42, 43, 48, 54
Gastrointestinal Disease
8, 11, 18, 27, 30, 31, 33, 34, 36, 47
Hematology/Oncology
3, 4, 11, 13, 18, 19, 26, 35, 37, 38, 39, 46, 47
Infectious Disease
17, 20
Internal Medicinea
1, 2, 4, 8, 11, 14, 15, 17, 18, 20, 24, 30, 31, 32, 33, 34, 42, 43, 48
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Environmental Medicine: Integrating a Missing Element into Medical Education
Selected Clerkships/Clinical Rotations
Selected Case Studies
Nephrology
1, 2, 6, 8, 14, 18, 19, 21, 22, 23
Neurology
1, 2, 8, 9, 18, 19, 21, 22, 23, 24, 30, 31, 33, 34, 41, 42, 45, 48
Obstetrics-Gynecologya
7, 9, 18, 19, 30, 31, 33, 34, 37, 44, 53
Orthopedics
6, 48
Otolaryngology
11, 19, 40, 51, 52, 54
Pediatricsa,b
2, 3, 5, 13, 14, 17, 18, 19, 21, 22, 26, 27, 28, 34, 54
Pulmonary Medicinec
3, 5, 10, 11, 12, 14, 15, 17, 20, 26, 27, 28, 30, 31, 33, 34, 40, 42, 43, 54, 55
Psychiatrya
8, 21, 22, 41, 42, 45, 46
Appendix A
Radiology
3, 5, 11, 35, 38, 39
aRequired clerkships/clinical rotations in all U.S. medical schools.
bAdditional information on curriculum content in pediatrics can be found in the Children’s Environmental Health Network manual entitled Kids and the Environment: Toxic Hazards—A Course on Pediatric Environmental Health. For more information, contact the California Public Health Foundation, Rod Armstrong, The Children’s Environmental Health Network, 5900 Hollis Street, Suite E, Emeryville, CA 94608, Telephone (510) 540–3657, Fax (510) 540–2673.
cAdditional information on curriculum development in pulmonology can be found in the reports:
Preventive Pulmonary Academic Award Program. 1993. Guidelines for Curriculum Development for Undergraduate Medical Education in the Prevention of Pulmonary Diseases. Bethesda, MD: Division of Lung Diseases, National Heart, Lung, and Blood Institute, National Institutes of Health, November.
Preventive Pulmonary Academic Award Program. 1994. Knowledge Bases and Sample Curricula. Bethesda, MD: Division of Lung Diseases, National Heart, Lung, and Blood Institute, National Institutes of Health, March.
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Environmental Medicine: Integrating a Missing Element into Medical Education
INDEX 3: Selected Case Studies Related to Sentinel Pathophysiological Conditions for Environmental/Occupational Evaluation
Sentinel Pathophysiological Conditions
Agent or Exposure Discussed
Selected Case Studies
CARDIOVASCULAR
Bradycardia
Pesticide
30, 33
Chest Pain
Methylene Chloride
24, 25
DERMATOLOGIC
Acne
Dioxin
13
Acne
Polychlorinated Biphenyl (PCB)
36
Acrodynia
Mercury
22
Contact Dermatitis
Chromium
11
Contact Dermatitis
Methylmethacrylate
49
Hyperkeratosis
Arsenic
1, 2
ENDOCRINOLOGIC
Thyrotoxicosis
Lead
18
GASTROINTESTINAL
Abdominal Pain
Lead
18
Abdominal Pain, Nausea, and Vomiting
Carbon Tetrachloride
8
Diarrhea
Nitrates
27
Diarrhea
Pesticides
30, 31, 33, 34
Vomiting
Pesticides
30, 31, 33, 34
HEMATOLOGIC/ ONCOLOGIC
Hypochronic Anemia
Lead
19
Leukemia
Benzene
4
Liver Cancer
Vinyl Chloride
47
Lung Cancer
Asbestos
3
Lung Cancer
Polynuclear Aromatic Hydrocarbon (PAH)
35
Lung Cancer
Radon
39
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Environmental Medicine: Integrating a Missing Element into Medical Education
Sentinel Pathophysiological Conditions
Agent or Exposure Discussed
Selected Case Studies
HEMATOLOGIC/ ONCOLOGIC
Methemoglobinemia
Nitrate
26
HEPATIC
Cancer
Vinyl Chloride
47
Hepatitis
Carbon Tetrachloride
8
Hepatitis
Polychlorinated Biphenyl (PCB)
36
INFECTIOUS
Respiratory
Hantavirus
17
Respiratory
Legionella
20
NEUROLOGIC
Ataxia
Mercury
21
Carpel Tunnel Syndrome (CTS)
Repetitive Motion
48
Dysarthria
Mercury
21
Encephalopathy
Trimethyltin
45
Headache
Carbon Tetrachloride
8
Headache
Methanol
23
Headache
Methylene Chloride
24
Headache
Tetrachloroethylene
41
Headache
Toluene
42
Hearing Loss
Lead
19
Hyperactive
Lead
19
Peripheral Neuropathy
Arsenic
1, 2
Tremor
Mercury
21
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Environmental Medicine: Integrating a Missing Element into Medical Education
Sentinel Pathophysiological Conditions
Agent or Exposure Discussed
Selected Case Studies
OBSTETRIC/GYNECOLOGIC
Miscarriage and Fetal Death
Carbon Monoxide
7
ORTHOPEDIC
Carpel Tunnel Syndrome (CTS)
Repetitive Motion
48
Osteomalacia Syndrome (CTS)
Cadmium
6
RENAL
Acute Renal Failure
Carbon Tetrachloride
8
Acute Renal Failure
Ethylene/Propylene Glycol
14
Acute Renal Failure
Methanol
23
Chronic Renal Failure
Cadmium
6
Chronic Renal Failure
Mercury
21, 22
Chronic Renal Failure
Lead
18, 19
REPRODUCTIVE AND DEVELOPMENTAL
Birth Defects
Various
53
Birth Defects
Mercury
22
Birth Defects
Radiation
37
Developmental Defects
Polychlorinated Biphenyl (PCB)
36
Developmental Defects
Lead
18, 19
Infertility
1,2-Dibromo-3-Chloropropane (DBCP)
32
RESPIRATORY
Asthma
Formalin
15
Asthma
Indoor Environment
54
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Environmental Medicine: Integrating a Missing Element into Medical Education
Sentinel Pathophysiological Conditions
Agent or Exposure Discussed
Selected Case Studies
RESPIRATORY
Chronic Upper Airway
Chromium
11
Cyanosis
Nitrate
27
Interstitial Fibrosis
Beryllium
5
Irritation Symptoms
Chromium
11
SOURCE: Kipen, HM and Craner, J. 1992. Sentinel pathophysiologic conditions: An adjunct to teaching occupational and environmental disease recognition and history-taking. Environmental Research 59:93–100.
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INDEX 4: Selected Case Studies Related to Clinical Signs, Symptoms, and Presenting Complaints
Clinical Signs, Symptoms, and Presenting Complaints
Agent or Exposure Discussed
Selected Case Studies
ABDOMINAL PAIN
Carbon Tetrachloride
8
Lead
18, 19
Pesticides
30, 31, 33, 34
ABORTIONS, SPONTANEOUS
Chlordane
9
1,1,1-Trichloroethane
44
Various
53
ACNE
Polychlorinated Biphenyl (PCB)
36
ALOPECIA
Arsenic
2
ALTERED MENTAL STATUS WITH UNCONSCIOUSNESS
Arsenic
2
Carbon Monoxide
7
Cyanide
12
Pesticides
30, 31, 33, 34
ANOREXIA
Chlordane
9
Chromium
11
Pentachlorophenol
29
Vinyl Chloride
47
ATAXIA
Mercury
21
Methanol
23
BIRTH DEFECTS
Reproductive and Developmental Hazards
53
1,1,1-Trichloroethane
44
BRADYCARDIA
Pesticides
30, 31, 33, 34
CHEST PAIN
Asbestos
3
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Clinical Signs, Symptoms, and Presenting Conditions
Agent or Exposure Discussed
Selected Case Studies
CHEST PAIN
Methylene Chloride
24, 25
Nitrogen Dioxide
28
Toluene Diisocyanate (TDI)
43
CONFUSION
Carbon Tetrachloride
8
Gasoline
16
Lead
18, 19
Methylene Chloride
24
Pesticides
30, 31, 33, 34
COUGH
Beryllium
5
Hantavirus
17
Indoor Environment
54
Legionella
20
Nitrogen Dioxide
28
Radon
39
Toluene
42
CYANOSIS
Nitrates
27
DELIRIUM
Arsenic
1, 2
Chromium
11
Dioxin
13
Gasoline
16
Mercury
21, 22
Methylmethacrylate
49
Trimethyltin
45
DIFFICULTY CONCENTRATING
Lead
18
Tetrachloroethylene (TCE)
41
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Environmental Medicine: Integrating a Missing Element into Medical Education
Clinical Signs, Symptoms, and Presenting Conditions
Agent or Exposure Discussed
Selected Case Studies
DIAPHORESIS
Mercury
21, 22
Pentachlorophenol
29
Pesticides
30, 31, 33, 34
DIARRHEA
Carbon Tetrachloride
8
Hantavirus
17
Nitrates
26, 27
Pesticides
30, 31, 33, 34
DYSARTHRIA
Mercury
21
DYSPNEA
Asbestos
3
Beryllium
5
Hantavirus
17
Indoor Environment
54
Nitrogen Dioxide
28
Pentachlorophenol
29
Pesticides
30, 31, 33, 34
Polynuclear Aromatic Hydrocarbon (PAH)
35
Toluene
42
Toluene Diisocyanate (TDI)
43
EPISTAXIS, ECCHYMOSES, and PETECHIA
Arsenic
2
Benzene
4
Chromium
11
FATIGUE
Arsenic
2
Benzene
4
Lead
18
Methylene Chloride
24
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Clinical Signs, Symptoms, and Presenting Conditions
Agent or Exposure Discussed
Selected Case Studies
FATIGUE
Pesticides
30, 31, 33, 34
Vinyl Chloride
47
FEVER
Hantavirus
17
Legionella
20
Pentachlorophenol
29
HEADACHE
Arsenic
2
Carbon Tetrachloride
8
Chlordane
9
Gasoline
16
Methanol
23
Methylene Chloride
24
Nitrogen Dioxide
28
Pesticides
30, 31, 33, 34
Tetrachloroethylene (TCE)
41
Toluene
42
HEARING LOSS
Lead
19
Occupational Noise
51, 52
HEMOPTYSIS
Nitrogen Dioxide
28
HEPATITIS
Carbon Tetrachloride
8
Chromium
11
Polychlorinated Biphenyl (PCB)
36
HEPATOMEGALY
Vinyl Chloride
47
HYPERTENSION
Lead
19
HYPOTENSION
Cyanide
12
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Environmental Medicine: Integrating a Missing Element into Medical Education
Clinical Signs, Symptoms, and Presenting Complaints
Agent or Exposure Discussed
Selected Case Studies
HYPOTENSION
Pesticides
30, 31, 33, 34
INCONTINENCE
Pesticides
30, 31, 33, 34
INFERTILITY
1,2-Dibromo-3-Chloropropane (DBCP)
32
Various
53
IRRITABILITY
Gasoline
16
Mercury
22
Methylene Chloride
24
Nitrates
26, 27
Tetrachloroethylene (TCE)
41
LACRIMATION
Pesticides
30, 31, 33, 34
LOW BACK PAIN
Cadmium
6
MUSCLE TWITCHING
Arsenic
2
Pesticides
30, 31, 33, 34
MYALGIA
Cadmium
6
Lead
18
NASAL IRRITATION WITH RHINORRHEA
Chromium
11
NAUSEA
Carbon Tetrachloride
8
Chlordane
9
Methanol
23
Pesticides
30, 31, 33, 34
PERIPHERAL NEUROPATHY
Arsenic
1, 2
Repetitive Motion
48
PROTEINURIA
Cadmium
6
Carbon Tetrachloride
8
Chromium
11
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Environmental Medicine: Integrating a Missing Element into Medical Education
Clinical Signs, Symptoms, and Presenting Complaints
Agent or Exposure Discussed
Selected Case Studies
RALES
Asbestos
3
Pesticides
30, 31, 33, 34
RASH
Arsenic
1, 2
Chromium
11
Dioxin
13
Environmental Exposures (i.e., allergens, irritants)
50
Mercury
21, 22
Methylmethacrylate
49
Pentachlorophenol
29
Polychlorinated Biphenyl (PCB)
36
SEIZURES
Arsenic
2
Pesticides
30, 31, 33, 34
Trimethyltin
45
TACHYCARDIA
Cyanide
12
Hantavirus
17
Methanol
23
Methylene Chloride
24
Nitrates
26, 27
Pentachlorophenol
29
TACHYPNEA
Cyanide
12
Ethylene/Propylene Glycol
14
Hantavirus
17
Nitrates
26, 27
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Environmental Medicine: Integrating a Missing Element into Medical Education
Clinical Signs, Symptoms, and Presenting Complaints
Agent or Exposure Discussed
Selected Case Studies
TACHYPNEA
Pentachlorophenol
29
TINNITUS
Methanol
23
VISUAL DISTURBANCE
Methanol
23
VOMITING
Carbon Tetrachloride
8
Ethylene/Propylene Glycol
14
Hantavirus
17
Nitrates
26, 27
Pesticides
30, 31, 33, 34
WEAKNESS
Pesticides
30, 31, 33, 34
Polynuclear Aromatic Hydrocarbon (PAH)
35
Repetitive Motion
48
WEIGHT LOSS
Benzene
4
Chromium
11
Pentachlorophenol
29
Polynuclear Aromatic Hydrocarbon (PAH)
35
Radon
38, 39
Vinyl Chloride
47
WHEEZING
Formalin
15
Indoor Environment
54
Pesticides
30, 31, 33, 34
Soybean Dust
40
Toluene Diisocyanate (TDI)
43
Representative terms from entire chapter:
clinical signs