D027 OA Final Exam Study Guide: Key Concepts and Conditions

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Western Governors University

D027 Advanced Pathopharmacological Foundations

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Date

D027 OA Final Exam Study Guide: Essential Concepts and Medical Conditions

Cryoablation and Prostate Cancer Treatment

What is cryoablation?

Cryoablation is a minimally invasive therapeutic technique commonly used to treat prostate cancer. This procedure works by freezing the cancerous tissues within the prostate gland, causing cellular destruction through the formation of intracellular ice crystals. The extreme cold disrupts cell membranes, triggering apoptosis (programmed cell death) and resulting in tumor reduction. Cryoablation offers an alternative treatment option for patients who are not suitable candidates for surgery or radiation therapy due to health conditions or other factors.

Occupational Lung Disease

What disease results from exposure to sandblasting?

Silicosis is a chronic occupational lung disease caused by inhalation of silica dust, commonly encountered in professions such as sandblasting. When silica particles enter the lungs, they provoke persistent inflammation, leading to progressive fibrosis (scarring) of lung tissues. This fibrosis impairs respiratory function and manifests with symptoms including chronic cough, shortness of breath, and heightened vulnerability to lung infections.

Amyotrophic Lateral Sclerosis (ALS)

Which type of ALS is most commonly observed?

The most frequently diagnosed form of Amyotrophic Lateral Sclerosis (ALS) is sporadic ALS. Unlike familial ALS, which is inherited, sporadic ALS has no clear genetic cause and appears randomly. This neurodegenerative disorder progressively destroys motor neurons, resulting in muscle weakness, involuntary twitching (fasciculations), and eventual paralysis.

Differentiating Types of Arthritis

How can osteoarthritis be differentiated from rheumatoid arthritis?

Osteoarthritis is primarily a degenerative joint disease caused by mechanical wear and tear. It usually presents as localized joint pain and stiffness that worsens with activity. In contrast, rheumatoid arthritis is an autoimmune condition characterized by systemic inflammation, symmetrical joint involvement, and symptoms such as fatigue and morning stiffness. The pathological processes differ: osteoarthritis involves cartilage degradation, whereas rheumatoid arthritis involves synovial inflammation and joint erosion.

Cardiac Conditions

Question	Answer
What does vegetation on an echocardiogram indicate?	Vegetation refers to bacterial or fungal growths attached to heart valves, typical of infective endocarditis.
What defines a Type 2 Myocardial Infarction (MI)?	Type 2 MI results from an imbalance between myocardial oxygen supply and demand, without plaque rupture.
What are the classic symptoms of MI?	Common signs include chest pain, pain radiating to the neck or jaw, and nausea or vomiting.
What is a key risk factor for erectile dysfunction?	Cardiovascular diseases, especially underlying heart conditions, greatly increase the risk.

Liver Conditions

What do ascites, jaundice, and elevated AST and ALT indicate?

The combination of ascites (fluid accumulation in the abdomen), jaundice (yellowing of the skin and eyes), and raised liver enzymes (AST and ALT) typically points to liver cirrhosis. Cirrhosis is a chronic liver disease marked by fibrosis and loss of normal liver function, often resulting from chronic liver injury or inflammation.

Kidney and Hematologic Disorders

Question	Answer
What diagnosis fits symptoms of decreased urine output, anemia, fatigue, and itchy skin?	These symptoms are consistent with End-Stage Renal Disease (ESRD), a condition where kidneys fail to filter waste effectively.
What is aplastic anemia?	Aplastic anemia is a hematologic disorder characterized by the bone marrow’s failure to produce sufficient blood cells, leading to pancytopenia.

Genetic and Infectious Diseases

Question	Answer
What is a chromosomal abnormality?	A chromosomal abnormality refers to alterations in chromosome number or structure, such as Turner syndrome, where a female is missing one X chromosome.
Which communicable disease causes rapid muscle weakness or paralysis?	Poliomyelitis is a viral infection that can cause acute muscle paralysis within hours of symptom onset.
What causes malaria?	Malaria is caused by Plasmodium parasites transmitted via bites from infected female Anopheles mosquitoes.

Biomarkers and Solutions

What is the significance of the HE4 biomarker?

HE4 (Human Epididymis Protein 4) is a biomarker that is elevated in ovarian tumors and ovarian cancer. It assists clinicians in the diagnosis and monitoring of these malignancies.

Is 0.9% sodium chloride solution isotonic to red blood cells?

Yes, a 0.9% sodium chloride solution, commonly called normal saline, is isotonic relative to red blood cells. This means it neither causes them to shrink (crenate) nor swell (hemolyze) when administered intravenously.

Causes of Peripheral Neuropathy and Delayed Puberty

Question	Answer
What are common causes of peripheral neuropathy?	Peripheral neuropathy can arise from vitamin deficiencies (e.g., B12), diabetes mellitus, stroke, or cardiovascular events.
What conditions can cause delayed puberty?	Chronic systemic illnesses and various hormonal or genetic disorders can disrupt normal pubertal timing.

Gynecological and Hematological Conditions

Question	Answer
What symptom is characteristic of dysmenorrhea?	Dysmenorrhea presents as painful menstrual cramps.
What are common risk factors for cholecystitis?	Gallstones, obesity, and infections increase the risk of cholecystitis.

Infectious Diseases and Musculoskeletal Disorders

Question	Answer
What is a symptom of early (stage one) Lyme disease?	Early Lyme disease commonly causes swelling of lymph nodes near the tick bite site.
What is lordosis in terms of spinal curvature?	Lordosis refers to an exaggerated inward curve of the lumbar spine.

Neuromuscular Conditions

What are the clinical features and treatment of ALS?

Amyotrophic Lateral Sclerosis (ALS) presents with symptoms such as muscle fasciculations, progressive weakness, and twitching primarily affecting the lower limbs initially. Treatment includes medications like riluzole, an anti-glutamate agent, which may modestly slow disease progression but is not curative.

Secondary Hypertension

What causes secondary hypertension related to sleep disorders?

Obstructive Sleep Apnea (OSA) is a notable cause of secondary hypertension. Repeated episodes of airway obstruction during sleep lead to intermittent hypoxia, which activates the sympathetic nervous system, raising blood pressure.

Basic Science Concepts

Question	Answer
What is diffusion?	Diffusion is the passive movement of molecules from a region of higher concentration to one of lower concentration.
What complications can arise from a perforated tympanic membrane?	A perforated eardrum can allow bacteria to enter the middle ear, leading to infections such as otitis media.

Hematological and Genetic Triggers

What triggers vaso-occlusive crises in sickle cell anemia?

Vaso-occlusive crises in sickle cell disease are commonly triggered by acidosis and dehydration. These conditions promote red blood cells to sickle, blocking small blood vessels and causing ischemic pain.

Renin-Angiotensin-Aldosterone System (RAAS)

What is the function of the RAAS?

The Renin-Angiotensin-Aldosterone System regulates blood pressure and fluid balance by causing vasoconstriction and increasing sodium and water retention. This elevates blood volume and pressure, essential for maintaining cardiovascular homeostasis.

Gastrointestinal Conditions

What is the name of pouch-like protrusions found in the sigmoid colon?

These outpouchings are called diverticula, and the condition is known as diverticulosis. It results from increased pressure inside the colon or weakening of the intestinal wall, common in older adults.

Mental Health and Immune System

Question	Answer
What diagnosis fits muscle weakness, fatigue, and emotional distress after a family death?	Fibromyalgia is a chronic pain syndrome often exacerbated by emotional stress, treated with antidepressants and sometimes acupuncture.
Which immune cells produce antibodies?	B lymphocytes (B cells) are responsible for producing antibodies in adaptive immunity.

Hematologic Malignancies

What are the phases of chronic myeloid leukemia (CML)?

Chronic myeloid leukemia progresses through three distinct phases:

Chronic phase (stable with mild symptoms),
Accelerated phase (increased blast cells and symptoms),
Blast crisis phase (resembles acute leukemia with aggressive disease).

Cardiac Valve Disorders

Which cardiac valve disorder causes blood to flow backward during systole?

Mitral insufficiency, also known as mitral regurgitation, allows blood to flow retrograde from the left ventricle into the left atrium during ventricular contraction, leading to volume overload and symptoms of heart failure.

Benign Tumors

What are common examples of benign tumors?

Common benign tumors include adenomas, which arise from glandular tissue, and osteomas, which originate from bone. These tumors are generally non-cancerous but may cause symptoms due to their size or location.

References

Fauci, A. S., et al. (2021). Harrison’s Principles of Internal Medicine (21st ed.). McGraw-Hill Education.

Jameson, J. L., Fauci, A. S., Kasper, D. L., Hauser, S. L., & Loscalzo, J. (2018). Harrison’s Manual of Medicine. McGraw-Hill Education.

Kumar, V., Abbas, A. K., & Aster, J. C. (2019). Robbins Basic Pathology (10th ed.). Elsevier.

Harrison’s Principles of Internal Medicine. (2018). (20th ed.). McGraw-Hill Education.