Starvation

Caloric intake below what is needed to maintain an organism's life

"Starving" redirects here. For the Hailee Steinfeld song, see Starving (song).

This article is about extreme malnutrition. For other uses, see Starvation (disambiguation).

Medical condition

Starvation

Starving Russian girl during the Russian famine of 1921–1922
Specialty| Critical care medicine
Symptoms| feeling weak or tired, lack of energy, loss of consciousness
Complications| Anemia, low blood sugar, dangerously low blood pressure, organ failure
Causes| Malnutrition
Diagnostic method| based on symptoms
Treatment| intensive care

Starvation is a severe deficiency in caloric energy intake, below the level needed to maintain an organism's life. It is the most extreme form of malnutrition. In humans, prolonged starvation can cause permanent organ damage[1] and eventually, death. The term inanition[2] refers to the symptoms and effects of starvation. Starvation by outside forces is a crime according to international criminal law and may also be used as a means of torture or execution.

According to the World Health Organization (WHO), hunger is the single gravest threat to the world's public health.[3][4] The WHO also states that malnutrition is by far the biggest contributor to child mortality, present in half of all cases.[3] Undernutrition is a contributory factor in the death of 3.1 million children under five every year.[5] The results also demonstrates that as global hunger levels have stabilized, however, despite some progress in specific areas such as stunting and exclusive breastfeeding, an alarming number of people still face food insecurity and malnutrition. In fact, the world has been set back 15 years, with levels of undernourishment similar to those in 2008-2009, with between 713 and 757 million people undernourished in 2023, and over 152 million more than in 2019 when the mid-range was 733 million.[6]

The bloated stomach represents a form of malnutrition called kwashiorkor. The exact pathogenesis of kwashiorkor is not clear, as initially it was thought to relate to diets high in carbohydrates (e.g. maize) but low in protein.[7] While many patients have low albumin, this is thought to be a consequence of the condition. Possible causes such as aflatoxin poisoning, oxidative stress, immune dysregulation, and altered gut microbiota have been suggested.[8] Treatment can help mitigate symptoms such as the pictured weight loss and muscle wasting, however prevention is of utmost importance.[7]

Without any food, humans usually die in around 2 months.[9] There was a case when someone survived over a year (382 days) under medical supervision.[10] Lean people can usually survive with a loss of up to 18% of their body mass; obese people can tolerate more, possibly over 20%. Females may survive longer than males due to their higher body fat content at the same BMI.[11][12]

## Signs and symptoms

[edit]

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Buchenwald inmates, 16 April 1945 when camp was liberated A girl during the Nigerian Civil War of the late 1960s, shown suffering the effects of severe hunger and malnutrition

The following are some of the symptoms of starvation:

### Changes in behaviour or mental status

[edit]

The beginning stages of starvation impact mental status and behaviours. These symptoms show up as irritable and/or unstable mood, fatigue, trouble concentrating, and preoccupation with food thoughts. People with those symptoms tend to be easily distracted and have no energy. Psychological effects are profound, including depression, anxiety, and a decrease in cognitive functions.[13]

### Physical signs

[edit]

As starvation progresses, the physical symptoms set in. The timing of these symptoms depends on age, size, and overall health. It usually takes days to weeks, and includes weakness, fast heart rate, shallow breaths that are slowed, thirst, and constipation. There may also be diarrhea in some cases. The eyes begin to sink in and glass over. The muscles begin to become smaller and muscle wasting sets in. Tiredness and dizziness also commonly occur, especially from any physical task. The skin is often overly pale.[14] One prominent sign in children is a swollen belly. Skin loosens and turns pale in color, and there may be swelling of the feet and ankles.

### Weakened immune system

[edit]

Symptoms of starvation may also appear as a weakened immune system, slow wound healing, and poor response to infection. Rashes may develop on the skin. The body directs any nutrients available to keeping organs functioning.

### Other symptoms

[edit]

Other effects of starvation may include:

* Anemia
* Gallstones
* Hypotension
* Stomach disease
* Cardiovascular and respiratory diseases
* Irregular or absent menstrual periods in women
* Kidney disease or failure
* Electrolyte imbalance
* Emaciation
* Oliguria

### Stages of starvation

[edit]

The symptoms of starvation show up in three stages. Phase one and two can show up in anyone that skips meals, diets, and goes through fasting. Phase three is more severe, can be fatal, and results from long-term starvation.

Phase one: When meals are skipped, the body begins to maintain blood sugar levels by degrading glycogen in the liver and breaking down stored fat and protein. The liver can provide glucose for the first few hours. After that, the body begins to break down fat and protein. The body uses fatty acids as an energy source for muscles but lowers the amount of glucose sent to the brain. Another chemical that comes from fatty acids is glycerol. It can be used as glucose for energy but eventually runs out.

Phase two: Phase two can last for weeks at a time. In this phase, the body mainly uses stored fat for energy. The breakdown occurs in the liver and turns fat into ketones. After fasting for one week, the brain will use these ketones and any available glucose. Using ketones lowers the need for glucose, and the body slows the breakdown of proteins.

Phase three: By this point, the fat stores are gone, and the body begins to turn to stored protein for energy. This means it needs to break down muscle tissues full of protein; the muscles break down very quickly. Protein is essential for cells to work correctly, and when it runs out, the cells can no longer function.

The cause of death due to starvation is usually an infection or the result of tissue breakdown. This is due to the body becoming unable to produce enough energy to fight off bacteria and viruses. The final stage of starvation includes signals like hair color loss, skin flaking, swelling in the extremities, and a bloated belly. Even though they may feel hunger, people in the final stage of starvation usually cannot eat enough food to recover without significant medical intervention.

## Causes

[edit]

Starving peasants during the Great Tenmei famine in 18th century Japan

Starvation occurs when the body expends more energy than it takes in for an extended period of time. This imbalance can arise from one or more medical conditions or circumstantial situations, which can include:

Medical reasons

* Anorexia nervosa
* Bulimia nervosa
* Eating disorder, not otherwise specified
* Esophageal achalasia
* Celiac disease
* Coma
* Major depressive disorder
* Diabetes mellitus
* Digestive disease
* Constant vomiting

Circumstantial causes

* Child, elder, or dependent abuse
* Famine for any reason, such as political strife and war[15][16]
* Hunger striking
* Excessive fasting
* Poverty
* Torture

## Biochemistry

[edit]

Main article: Starvation response

With a typical high-carbohydrate diet, the human body relies on free blood glucose as its primary energy source. Glucose can be obtained directly from dietary sugars and by the breakdown of other carbohydrates. In the absence of dietary sugars and carbohydrates, glucose is obtained from the breakdown of stored glycogen. Glycogen is a readily-accessible storage form of glucose, stored in notable quantities in the liver and skeletal muscle.

After the exhaustion of the glycogen reserve, and for the next two to three days, fatty acids become the principal metabolic fuel. At first, the brain continues to use glucose. If a non-brain tissue is using fatty acids as its metabolic fuel, the use of glucose in the same tissue is switched off. Thus, when fatty acids are being broken down for energy, all of the remaining glucose is made available for use by the brain.[citation needed]

After two or three days of fasting, the liver begins to synthesize ketone bodies from precursors obtained from fatty acid breakdown. The brain uses these ketone bodies as fuel, thus cutting its requirement for glucose. After fasting for three days, the brain gets 30% of its energy from ketone bodies. After four days, this may increase to 70% or more.[17] Thus, the production of ketone bodies cuts the brain's glucose requirement from 80 g per day to 30 g per day, about 35% of normal, with 65% derived from ketone bodies. But of the brain's remaining 30 g requirement, 20 g per day can be produced by the liver from glycerol (itself a product of fat breakdown). This still leaves a deficit of about 10 g of glucose per day that must be supplied from another source; this other source will be the body's own proteins.

After exhaustion of fat stores, the cells in the body begin to break down protein. This releases alanine and lactate produced from pyruvate, which can be converted into glucose by the liver. Since much of human muscle mass is protein, this phenomenon is responsible for the wasting away of muscle mass seen in starvation. However, the body is able to choose which cells will break down protein and which will not. About 2–3 g of protein has to be broken down to synthesize 1 g of glucose; about 20–30 g of protein is broken down each day to make 10 g of glucose to keep the brain alive. However, this number may decrease the longer the fasting period is continued, in order to conserve protein.

Starvation ensues when the fat reserves are completely exhausted and protein is the only fuel source available to the body. Thus, after periods of starvation, the loss of body protein affects the function of important organs, and death results, even if there are still fat reserves left. In a leaner person, the fat reserves are depleted faster, and the protein, sooner, therefore death occurs sooner.[citation needed] Ultimately, the cause of death is in general cardiac arrhythmia or cardiac arrest, brought on by tissue degradation and electrolyte imbalances. Conditions like metabolic acidosis may also kill starving people.[18]

## Prevention

[edit]

Starvation can be caused by factors beyond the control of the individual. The Rome Declaration on World Food Security outlines several policies aimed at increasing food security[19] and, consequently, preventing starvation. These include:

* Poverty reduction
* Prevention of wars and political instability
* Food aid[20]
* Agricultural sustainability
* Reduction of economic inequality

Supporting farmers in areas of food insecurity through such measures as free or subsidized fertilizers and seeds increases food harvest and reduces food prices.[21]

Starvation is commonly used as a method of warfare, however, it has been outlawed and is now a crime. Notable incidents in history include the blockade of Germany and blockade of Biafra.[22][23]

## Treatment

[edit]

Patients that suffer from starvation can be treated, but this must be done cautiously to avoid refeeding syndrome.[24] Rest and warmth must be provided and maintained. Food can be given gradually in small quantities. The quantity of food can be increased over time. Proteins may be administered intravenously to raise the level of serum proteins.[25] For worse situations, hospice care and opioid medications can be used.

### Organizations

[edit]

Main article: Famine relief

Many organizations have been highly effective at reducing starvation in different regions. Aid agencies give direct assistance to individuals, while political organizations pressure political leaders to enact more macro-scale policies that will reduce famine and provide aid.

## Statistics

[edit]

Percentage of population suffering from hunger, World Food Programme, 2020:

< 2.5%

< 5.0%

5.0–14.9%

15.0–24.9%

25.0–34.9%

> 35.0%

No data

Main articles: Malnutrition and Hunger

According to estimates by the Food and Agriculture Organization, between 720 and 811 million people were affected by hunger globally in 2020.[26] This was a decrease from estimated 925 million in 2010[26] and roughly 1 billion in 2009.[27] In 2007, 923 million people were reported as being undernourished, an increase of 80 million since 1990–92.[28] An estimated 820 million people did not have enough to eat in 2018, up from 811 million in the previous year, which is the third year of increase in a row.[29]

As the definitions of starving and malnourished people are different, the number of starving people is different from that of malnourished. Generally, far fewer people are starving than are malnourished.

The proportion of malnourished and starving people in the world has been more or less continually decreasing for at least several centuries.[30] This is due to an increasing supply of food and to overall gains in economic efficiency. In 40 years, the proportion of malnourished people in the developing world has been more than halved. The proportion of starving people has decreased even faster.

Year | 1970 | 1980 | 1990 | 2004 | 2007 | 2009

|
|
|
|
|
|

Proportion of undernourished people in the less-developed world[27][31][32] | 37 % | 28 % | 20 % | 16 % | 17 % | 16 %

## Capital punishment

[edit]

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Main article: Immurement

English Wikisource has original text related to this article:

The Women of the Caesars

Historically, starvation has been used as a death sentence. From the beginning of civilization to the Middle Ages, people were immured, and died for want of food.

In ancient Greco-Roman societies, starvation was sometimes used to dispose of guilty upper-class citizens, especially erring female members of patrician families. In the year 31, Livilla, the niece and daughter-in-law of Tiberius, was discreetly starved to death by her mother for her adulterous relationship with Sejanus and for her complicity in the murder of her own husband, Drusus the Younger.[citation needed]

Another daughter-in-law of Tiberius, named Agrippina the Elder (a granddaughter of Augustus and the mother of Caligula), also died of starvation, in 33 AD; however, it is unclear if her starvation was self-inflicted.

The starving Livilla refusing food.
From a drawing by André Castagne.

A son and daughter of Agrippina were also executed by starvation for political reasons; Drusus Caesar, her second son, was put in prison in 33 AD, and starved to death by orders of Tiberius (he managed to stay alive for nine days by chewing the stuffing of his bed); Agrippina's youngest daughter, Julia Livilla, was exiled on an island in 41 by her uncle, Emperor Claudius, and her death by starvation was arranged by the empress Messalina.

It is also possible that Vestal Virgins were starved when found guilty of breaking their vows of celibacy.

Ugolino della Gherardesca, his sons, and other members of his family were immured in the Muda, a tower of Pisa, and starved to death in the thirteenth century. Dante, his contemporary, wrote about Gherardesca in his masterpiece The Divine Comedy.

In Sweden in 1317, King Birger of Sweden imprisoned his two brothers for a coup they had staged several years earlier (Nyköping Banquet). According to legend they died of starvation a few weeks later, since their brother had thrown the prison key in the castle moat.

In Cornwall in the UK in 1671, John Trehenban from St Columb Major was condemned to be starved to death in a cage at Castle An Dinas for the murder of two girls.

The Makah, a Native American tribe inhabiting the Pacific Northwest near the modern border of Canada and the United States, practiced death by starvation as a punishment for slaves.[33]

## See also

[edit]

* 2007–2008 world food price crisis
* Anorexia mirabilis
* Cachexia
* Global Hunger Index
* Starvation mode
* Famine scales
* Hunger strike
* List of famines
* List of people who died of starvation
* Marasmus
* Protein poisoning

## References

[edit]

1. ^ Stratton, Rebecca J.; Green, Ceri J.; Elia, Marinos (2003-01-01). Disease-related Malnutrition: An Evidence-based Approach to Treatment. CABI. ISBN 978-0-85199-648-6. "When [food] intake is poor or absent for a long time (weeks), weight loss is associated with organ failure and death."
2. ^ "Definition of INANITION". www.merriam-webster.com. Retrieved 2021-10-26.
3. ^ a b "The starvelings". The Economist. ISSN 0013-0613. Retrieved 2023-02-14.
4. ^ "As more go hungry and malnutrition persists, achieving Zero Hunger by 2030 in doubt, UN report warns". www.who.int. Retrieved 2021-10-27.
5. ^ "Hunger Stats". World Food Programme.
6. ^ WHO (24 July 2024). "Hunger numbers stubbornly high for three consecutive years as global crises deepen: UN report". WHO. Retrieved 27 September 2024.
7. ^ a b "Kwashiorkor - Symptoms, Causes, Treatments - Better Medicine". Archived from the original on 2011-10-02. Retrieved 2011-06-26.
8. ^ "Protein-Energy Malnutrition | Nutrition Guide for Clinicians". PCRM's nutrition guide for clinicians. PCRM. Retrieved 16 April 2019.
9. ^ "Blaine emerges from his 44-day 'fast' | Television industry | the Guardian".
10. ^ "The True Story of a Man Who Survived Without Any Food for 382 Days". 27 February 2017.
11. ^ Lieberson, Alan D. (November 8, 2004). "How Long Can a Person Survive without Food?". Scientific American. Retrieved 2023-02-14.
12. ^ Burch, Kelly (September 3, 2021). "How many days a person can survive without food or water". Insider. Retrieved 2023-02-14.
13. ^ "The Starved Brain – Can What We Eat Determine How We Think?".
14. ^ Keys, Ancel (November 19, 1944). "They Starved So That Others Be Better Fed". The Journal of Nutrition. 135 (6): 1347–1352\. doi:10.1093/jn/135.6.1347. PMID 15930436. S2CID 4460542.
15. ^ Howe Bancroft, Hubert (1883). "North American states. 1883". History of the Pacific States of North America. 10. A.L. Bancroft,1883: 411.
16. ^ Taylor, Charles (1811). "The Literary Panorama, Volume 10". The Literary Panorama. 10: 539.
17. ^ C. J. Coffee (Dec 1, 2004). Quick Look: Metabolism. Hayes Barton Press. p. 169.
18. ^ Toth, HL; Greenbaum, LA (November 2003). "Severe acidosis caused by starvation and stress". American Journal of Kidney Diseases. 42 (5): E16-9. doi:10.1016/j.ajkd.2003.07.012. PMID 14582074.
19. ^ "Rome Declaration and Plan of Action". www.fao.org. Retrieved 2023-02-14.
20. ^ Laird Birmingham, C. (2000). "Child hunger: semi-starvation study repeated in Canada". Canadian Medical Association Journal. 163 (8): 985–986\. PMC 80547. PMID 11068570.
21. ^ Dugger, Celia W. (2007-12-02). "Ending Famine, Simply by Ignoring the Experts". The New York Times. ISSN 0362-4331. Retrieved 2023-02-14.
22. ^ Mulder, Nicholas; van Dijk, Boyd (2021). "Why Did Starvation Not Become the Paradigmatic War Crime in International Law?". Contingency in International Law: On the Possibility of Different Legal Histories. Oxford University Press. pp. 370–. ISBN 9780192898036.
23. ^ Jordash, Wayne; Murdoch, Catriona; Holmes, Joe (1 September 2019). "Strategies for Prosecuting Mass Starvation". Journal of International Criminal Justice. 17 (4): 849–879\. doi:10.1093/jicj/mqz044.
24. ^ Mehanna HM, Moledina J, Travis J (June 2008). "Refeeding syndrome: what it is, and how to prevent and treat it". BMJ. 336 (7659): 1495–8\. doi:10.1136/bmj.a301. PMC 2440847. PMID 18583681.
25. ^ "The Physiology and Treatment of Starvation". Proceedings of the Royal Society of Medicine. 38 (7). US national library of medicine: 388–398\. 1945. doi:10.1177/003591574503800716. PMC 2181967. PMID 19993083.
26. ^ a b "Hunger". Food and Agriculture Organization of the United Nations. Retrieved 2022-02-15.
27. ^ a b The State of Food Security and Nutrition in the World 2022. FAO | Food and Agriculture Organization of the United Nations. 2022. doi:10.4060/cc0639en. hdl:10654/44801. ISBN 978-92-5-136499-4. S2CID 264474106. Retrieved 2023-02-14.
28. ^ "The State of Food Insecurity in the World 2008". www.fao.org. Retrieved 2023-02-14.
29. ^ "World hunger is still not going down after three years and obesity is still growing – UN report". www.who.int.
30. ^ Fogel, Robert William (2004-05-17). The Escape from Hunger and Premature Death, 1700–2100: Europe, America, and the Third World. Cambridge University Press. ISBN 978-0-521-00488-6.
31. ^ Food and Agriculture Organization Agricultural and Development Economics Division. "The State of Food Insecurity in the World, 2006 : Eradicating world hunger – taking stock ten years after the World Food Summit". Food and Agriculture Organization of the United Nations, 2006, p. 8. "Because of population growth, the very small decrease in the number of hungry people has nevertheless resulted in a reduction in the proportion of undernourished people in the developing countries by 3 percentage points – from 20 percent in 1990–92 to 17 percent in 2001–03. (…) the prevalence of undernourishment declined by 9 percent (from 37 percent to 28 percent) between 1969–71 and 1979–81 and by a further 8 percentage points (to 20 percent) between 1979–81 and 1990–92".
32. ^ Food and Agriculture Organization Economic and Social Development Department. "The State of Food Insecurity in the World, 2008 : High food prices and food security - threats and opportunities". Food and Agriculture Organization of the United Nations, 2008, p. 6. "Good progress in reducing the share of hungry people in the developing world had been achieved – down from almost 20 percent in 1990–92 to less than 18 percent in 1995–97 and just above 16 percent in 2003–05. The estimates show that rising food prices have thrown that progress into reverse, with the proportion of undernourished people worldwide moving back towards 17 percent".
33. ^ Donald, Leland (1997). Aboriginal Slavery on the Northwest Coast of North America, University of California Press, p. 23

## Further reading

[edit]

Library resources about
Starvation

* * *

* Online books
* Resources in your library
* Resources in other libraries

* U.N. Chief: Hunger Kills 17,000 Kids Daily \- by CNN
* Wilson, DE; Zeikus, R; Chan, IF (Apr 1987). "Relationship of organ lipoprotein lipase activity and ketonuria to hypertriglyceridemia in starved and streptozocin-induced diabetic rats". Diabetes. 36 (4): 485–90\. doi:10.2337/diabetes.36.4.485. PMID 3817303.
* Swaner, JC; Connor, WE (Aug 1975). "Hypercholesterolemia of total starvation: its mechanism via tissue mobilization of cholesterol". The American Journal of Physiology. 229 (2): 365–9\. doi:10.1152/ajplegacy.1975.229.2.365. PMID 169705.

## External links

[edit]

* Media related to Starvation at Wikimedia Commons
* Quotations related to Starvation at Wikiquote

Classification|

* ICD-10: T73.0
* ICD-9-CM: 994.2
* MeSH: D013217
* DiseasesDB: 12415

|

* v
* t
* e

Malnutrition

Protein-energy
malnutrition|

* Ascites
* Emaciation
* Kwashiorkor
* Marasmus
* Catabolysis

Vitamin deficiency|

| B vitamins|

* B1
* Beriberi
* Wernicke–Korsakoff syndrome
* Wernicke's encephalopathy
* Korsakoff syndrome
* B2
* Riboflavin deficiency
* B3
* Pellagra
* B6
* Pyridoxine deficiency
* B7
* Biotin deficiency
* B9
* Folate deficiency
* B12
* Vitamin B12 deficiency

|

Other|

* A: Vitamin A deficiency
* Bitot's spots
* C: Scurvy
* D: Vitamin D deficiency
* Rickets
* Osteomalacia
* Harrison's groove
* E: Vitamin E deficiency
* K: Vitamin K deficiency

Mineral deficiency|

* Electrolyte imbalance
* Calcium
* Chloride
* Magnesium
* Phosphate
* Potassium
* Sodium
* Iron
* Zinc
* Manganese
* Copper
* Iodine
* Chromium
* Molybdenum
* Selenium
* Keshan disease
* Fluorine

Growth|

* Deformity
* Delayed milestone
* Failure to thrive
* Short stature
* Idiopathic

General|

* Anorexia
* Cachexia
* Deficiency (medicine)
* Dehydration
* Epidemiology of malnutrition
* Famine
* Food fortification
* Hunger
* Human right to water and sanitation
* Micronutrient deficiency
* Right to health
* Starvation
* Starvation (crime)
* Terminal dehydration
* Undernutrition in children
* Weight loss
* Underweight

* v
* t
* e

Consequences of external causes

Temperature|

| Elevated|

* Burn
* Hyperthermia
* Heat syncope

|

Reduced|

* Hypothermia
* Immersion foot syndromes
* Trench foot
* Tropical immersion foot
* Warm water immersion foot
* Non-freezing cold injury
* Chilblains
* Frostbite
* Aerosol burn
* Cold intolerance
* Acrocyanosis
* Erythrocyanosis crurum

Radiation|

* Chronic radiation keratosis
* Eosinophilic, polymorphic, and pruritic eruption associated with radiotherapy
* Radiation acne
* Radiation burn
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* Radiation-induced erythema multiforme
* Radiation-induced hypertrophic scar
* Radiation-induced keloid
* Radiation-induced morphea
* Radiation poisoning
* Radiation recall reaction
* Sunburn

Oxygen|

* Hypoxia/Asphyxia
* Oxygen toxicity

Pressure|

* Barotrauma
* Arterial gas embolism
* Aerosinusitis
* Middle ear barotrauma
* Pneumothorax
* Decompression sickness
* Inner ear decompression sickness
* High altitude
* Altitude sickness
* Chronic mountain sickness
* Death zone
* High-altitude pulmonary edema (HAPE)
* High-altitude cerebral edema (HACE)

Food|

* Starvation

Maltreatment|

* Physical abuse
* Sexual abuse
* Psychological abuse

Travel|

* Motion sickness
* Seasickness
* Airsickness
* Space adaptation syndrome

Adverse effect|

* Hypersensitivity
* Anaphylaxis
* Angioedema
* Allergy
* Arthus reaction

* Adverse drug reaction

Other|

* Electrical injury
* Lightning injuries
* Drowning

Ungrouped
skin conditions
resulting from
physical factors|

* Dermatosis neglecta
* Pinch mark
* Pseudoverrucous papules and nodules
* Sclerosing lymphangitis
* Tropical anhidrotic asthenia
* UV-sensitive syndrome
* environmental skin conditions
* Electrical burn
* frictional/traumatic/sports
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* Fissure of the nipple
* Pulling boat hands
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* Wrestler's ear
* Coral cut
* Painful fat herniation
* Uranium dermatosis
* iv use
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