- Many cancer treatments work by suppressing rapidly-dividing cells. Note that cancer cells divide rapidly, but some healthy cells (e.g., white blood cells) also divide rapidly. Hence, the immune system weakens, making the patient more likely to get infected and experience severe COVID-19 complications.

COVID-19 and Cancer Comorbidity

- Note: Having some cancer symptoms/signs doesn't mean one has cancer. Also, many cancers don't have clear signs/symptoms, especially during the early and middle stages.

General Signs/Symptoms of Cancer
- Unexplained weight loss
- Fever
- Fatigue
- Pain
- Skin changes

Signs/Symptoms of Specific Cancers
- Changes in bowel/bladder functions
- Sores that don't heal
- White patches in mouth or on the tongue
- Unusual bleeding/discharge
- Thickening or lump in part(s) of the body
- Persistent Indigestion or swallowing difficulties
- Persistent, "nagging cough or hoarseness"
- Other major changes in how one feels or one's body functions

Signs and Symptoms of Cancer

- Treatment resistance
- Types of treatment (e.g., surgery, chemotherapy, radiotherapy)
- Treatment approaches/aspects (e.g., palliative care, precision medicine)
- Other treatments (e.g., hyperthermia, complementary medicine)

Cancer Treatment

User-Created Sources
- Cancer Tutorial | Sai Chengalvala

Primary Sources
- PeeWeeToms

General 
- Alliance for Aging Research
- American Association for Cancer Research (AACR)
- American Cancer Society
- Cancer.Net
- Demystifying Medicine
- Doc Unlock
- HealthCareInsider
- Healthcare Triage
- Mayo Clinic | Mayo Foundation for Medical Education and Research (MFMER)
- MD Anderson Cancer CEnter
- NIH - National Cancer Institute
- Rogel Cancer Center | Michigan Medicine

Journals Used
- The Lancet 
- The Lancet Oncology
- Nature Reviews | Clinical Oncology

*Note: This list excludes the references that are only used for the node "COVID-19 and Cancer Comorbidity" and its children. If I include them here, this list will get too crowded and hence will become less useful.

Cancer | References Used

According to the American Cancer Society (original source) and https://cancer80.weebly.com/ (secondary source), 
- In the USA, 1 in every 3 people will get cancer at some point in their lives, and cancer causes 1 in every 5 deaths. 
- Most of us will have a parent, sibling, relative, or friend who eventually dies from cancer.
- Cancer takes a financial, emotional, and psychological toll on patients and caregivers.

Impact of Cancer

According to the American Association for Cancer Research (AACR),
- 4 in every 10 cancer cases are preventable.
- Tobacco smoking (19%), excess body weight (8%), alcohol (6%), UV radiation (5%), poor diet (5%), infections (4%), and sedentary lifestyles (3%) are the main preventable risk factors for cancer.
- Numbers in parentheses indicate % of US cases in adults age >30 attributable to the indicated risk factors.

The above content is copied verbatim from Venkata Chengalvala's website https://cancer80.weebly.com/prevention.html.

Preventable Causes of Cancer

Financial toxicity is when patients struggle with the severe financial burden of cancer treatments. It causes severe distress -- sometimes more than the cancer itself -- even pushing many patients to skip treatment.

Cancer | Financial Toxicity

Cancer health disparities are differences among populations in their treatment and diagnosis of cancer. This is due to social, environmental, and economic disadvantages. 


Cancer Disparities 

Mutant HTT (huntingtin) directly interacts with p53, a tumor suppressor whose mutation is responsible for breast cancers, in mice and flies. Although not always, the phosphorylation of HTT can also induce neuro protectiveness in individuals with Huntington’s and can help regulate cell differentiation and localization. Overall, there is 80% less rate of cancer amongst people with Huntington's than the normal population.

Connection Between Cancer and Huntington's

Cancer forms in the cells of the breasts. Breast cancer can occur in women and rarely in men. Symptoms of breast cancer include a lump in the breast, bloody discharge from the nipple, and changes in the shape or texture of the nipple or breast.

Breast Cancer

- Cancer is a term that refers to a collection of diseases in which some of the body's cells divide uncontrollably and invade surrounding tissues. 
- Cancer can metastasize, i.e., spread to other parts of the body. Metastatic cancer is hard to treat and tends to be fatal. Most cancer deaths are caused by metastasis.

This node should be a relation node, but I can't delete it since it's a root node of the "cancer" tree and it has two upvotes.


University of Michigan - Ann Arbor

Pepperdine University

Emory University

- As per NIH, chronic diseases usually last for ≥3 months and can be progressive.
- As per CDC, the deadliest chronic diseases in the US (from most to least deadly) are heart disease, cancer, CLRD, stroke, Alzheimer's disease, and diabetes.
- People with chronic diseases are more likely to experience severe complications of COVID-19 if they get infected.

Chronic Diseases

- Cystic fibrosis
- Diabetes
- Multiple sclerosis
- Cancers
- AIDS
- Hemophilia
- Epilepsy
- Hepatitis
- Hyperhidrosis
- Musculoskeletal Disorders
- Cardiovascular Diseases
- Long COVID

List of Medical Disabilities

NIH-National Cancer Institute

Cancer

- According to the WHO, "Cardiovascular disease is the name for the group of disorders of heart and blood vessels."  
- As per WHO, cardiovascular disease includes hypertension, coronary heart disease, cerebrovascular disease,  peripheral vascular disease, heart failure, rheumatic heart disease, congenital heart disease, and cardiomyopathies. 
- Cardiovascular disease is a risk factor for severe COVID-19, and COVID-19 causes cardiovascular complications. 

Cardiovascular disease 

Previous lung disease is a risk factor for mortality in patients with COVID-19. Older age, male gender, home oxygen therapy, and respiratory failure on admission were associated with an increased mortality. 

lung disease

- CKD, also known as chronic renal disease,  is a chronic, non-communicable, irreversible condition where kidney function gradually declines over time.
- However, CKD progression can be slowed down dramatically or even stopped.
- The earlier stages of CKD are usually asymptomatic.
- Diabetes and high blood pressure cause almost two-thirds of CKD cases.
- Source: https://www.kidney.org/atoz/content/about-chronic-kidney-disease

Chronic Kidney Disease

During the COVID-19 era the regular treatment and communication between physicians and patients regarding preexisting comorbidities has been disrupted. New guidelines and safety precautions must be put in place in order for physicians to still treat their patients and treat them through the use of telehealth or other means. While there are a lot of similarities between new communication policies being implemented across different areas of medicine, there are also many differences due to comorbidity specific criteria which facilitates different levels of involvement and communication between physicians and patients.


The comorbidities addressed under this node include:
- Cancer
- Cardiovascular Diseases
- Digestive Diseases
- Elective Surgeries
- Liver Diseases
- Psychological Disorders
- Renal Diseases

Changes to COVID-19 Patient Comorbidity Treatment and Communication

Diabetes is a collection of diseases in which blood glucose levels (i.e., blood sugar) is too high. The most common types of diabetes are type II diabetes, type I diabetes, gestational diabetes, and prediabetes.



Diabetes

- Alzheimer's disease is a progressive chronic disease. It's "a type of dementia that affects memory, thinking and behavior"; over time, these symptoms progressively interfere with daily tasks.
- It's the 6th leading cause of death. Current treatments can alleviate the symptoms but can't stop the progression of Alzheimer's.

Alzheimer's Disease

Neurodegenerative diseases refers to neurological diseases caused by neuronal death or deterioration due to many factors, including protein aggregation/misfolding, apoptosis, and mitochondrial dysfunction. 

Neurodegenerative Diseases

- Motivation
- Goal setting
- Problem Solving (overcoming barriers to positive change)
- Emotional Management
- Health Psychology

Link between Psychology and Chronic Diseases

Since mindfulness meditation can alleviate symptoms of distress, pain, and chronic disease, it can be used to treat hallucinations and delusions experienced by schizophrenic patients. 

What Symptoms Mindfulness Meditation can help Treat in Patients with Severe Schizophrenia

Abnormally excessive sweating that is often unrelated to body temperature nor exercise. Known as the silent disorder, this is a widespread condition that affects almost 3% of the population. Currently, solutions to alleviate the condition either serve as temporary solutions or cause many other side effects.

Hyperhidrosis

"Chronic pain management" or "pain management" typically refers to the practice of employing pain killing medicines, psychological therapy/ practices, and/ or managing/ controlling the environment of the patient/ sufferer in order to lessen or mitigate the pain they feel or else make the pain in question more manageable.

Chronic Pain Management

Chronic pain is often a symptom of chronic conditions/ disabilities, though not always. In the medical sphere, "chronic pain" is defined as pain that may be constant in some sense of come and go. Or, in the case of conditions that may have a cure or may "heal", chronic pain is defined as pain that lasts longer than three to six months.

Chronic Pain

Chronic illness increases the likelihood of comorbid conditions such as mental illness and other physical conditions, a lower quality of life, increased cost of healthcare, and complications from a failure to manage the condition(s) properly. 

Mental Health Issues in Children and Adolescents with Chronic Illness

According to the CDC, Human immunodeficiency virus (HIV) is a virus that attack’s the infected person’s immune system. With proper care, one can manage their HIV symptoms and protect their families, however, when not treated HIV leads to acquired immunodeficiency syndrome, also known as AIDS. 

HIV/AIDS 

Epilepsy is a neurological disorder in which brain activity becomes abnormal, resulting in seizures, unusual behavior, sensations, and lack of awareness. Symptoms may vary widely, and at least 2 seizures without a known cause at least 24 hours apart are usually required for an epilepsy diagnoses.

Epilepsy

Cystic fibrosis is an inherited disorder that affects cells that produce mucus, sweat and digestive juices. In affected individuals, these secretions are much thicker than they should be, causing blockages in passageways of the body.

Cystic Fibrosis


Based on the Guidance made by U.S. Department of Health & Human Services in 2022,  "Long COVID" can be referred as the post COVID-19 symptoms that last for weeks, months or years :
- a physical impairment including any physiological disorder or condition affecting one, or more body systems 
- a mental impairment including any mental or psychological disorder such as an emotional or mental illness.

Long COVID in United States

Diabetes is a disease in which blood glucose levels are above normal because either the body doesn't make enough insulin, or the body can't use its own insulin well enough. Diabetes can be qualified as a disability under the Americans with Disabilities Act(ADA) when the symptoms are severe and require treatment at work. The ADA prohibits discrimination against qualified individuals with diabetes disabilities.

The SSa's Blue Book section 4.00 lists all the heart disease that SSA considers a "cardiovascular aliment". The SSA defines a cardiovascular aliment as any disorder that affects the proper functioning of the heart or the circulatory system.

Cardiovascular Diseases

Long covid itself may not be a disability but given its potentially debilitating effects on people’s lives, it can be disabling. Long covid symptoms may also constitute disabilities because of loss of human function or because of a persistent impairment that undermines a person’s quality of life. 
An employment tribunal in the UK has for the first time ruled that a person’s long-COVID is a disability protected by the Equality Act 2010 in July 29th, 2022. 

Learn Before

Related

Learn After