Pica (disorder)

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This article is about the medical disorder. For other uses, see Pica.
Pica (disorder)
Classification and external resources
Stomach contents of an inmate with pica
ICD-10 F50.8, F98.3
ICD-9 307.52
DiseasesDB 29704
eMedicine ped/1798 
MeSH D010842

Pica is a medical disorder characterized by an appetite for substances largely non-nutritive (e.g., clay, coal, soil, feces, chalk, paper, soap, mucus, ash, gum etc.) or an abnormal appetite for some things that may be considered foods, such as food ingredients (e.g., flour, raw potato,raw rice, starch, ice cubes, salt, blood).[1] In order for these actions to be considered pica, they must persist for more than one month at an age where eating such objects is considered developmentally inappropriate. The condition's name comes from the Latin word for magpie, a bird which is reputed to eat almost anything[1]. Pica is seen in all ages, particularly in pregnant women and small children, especially among children who are developmentally disabled, where it is the most common eating disorder[2].

Pica in children, while common, can be dangerous. Children eating painted plaster containing lead may suffer brain damage from lead poisoning. There is a similar risk from eating dirt near roads that existed prior to the phaseout of tetra-ethyl lead in gasoline (in some countries) or prior to the cessation of the use of contaminated oil (either used, or containing toxic PCBs or dioxin) to settle dust. In addition to poisoning, there is also a much greater risk of gastro-intestinal obstruction or tearing in the stomach[citation needed]. This is also true in animals. Another risk of dirt eating is the possible ingestion of animal feces and the accompanying parasites. Pica can also be found in animals, and is most commonly found in dogs.

Contents

[edit] Causes

The scant research that has been done on the root causes of pica suggests that the majority of those afflicted tend to suffer some biochemical deficiency, and more often, iron deficiency[citation needed]. The association between pica and iron deficiency anemia is so strong that most patients with iron deficiency will admit to some form of pica.[citation needed] Often the substance eaten by those with the disorder contains the mineral of deficiency. If a mineral deficiency is not identified as the cause of pica, it often leads to a diagnosis of a mental disorder.

Pica may also be a symptom of iron deficiency anemia secondary to hookworm infection. Symptoms may also include a bluish hue to the skin, particularly around the mouth.

Unlike in humans, in dogs or cats, pica may be a sign of immune-mediated hemolytic anemia, especially when it involves eating substances such as tile grout, concrete dust, and sand. Dogs exhibiting this form of pica should be tested for anemia with a CBC or at least hematocrit levels. [2][3]

[edit] Treatment

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Treatment emphasizes psychosocial, environmental, and family guidance approaches. Treatment options include: discrimination training between edible and inedible items, self-protection devices that prohibit placement of objects in the mouth, sensory reinforcement involving screening (covering eyes briefly), contingent aversive oral taste (lemon), contingent aversive smell sensation (ammonia), contingent aversive physical sensation (water mist), brief physical restraint, and overcorrection (punishment when child eats non-food items).

This involves associating negative consequences with eating non-food items and good consequences with normal behavior. Medications may be helpful in reducing the abnormal eating behavior if pica occurs in the course of a developmental disorder, such as mental retardation or pervasive developmental disorder. These conditions may be associated with severe behavioral disturbances, including pica. These medications enhance dopaminergic functioning, which is believed to be associated with the occurrence of pica.

[edit] Examples

Chalky stone composed of kaolinite with traces of quartz ingested by a patient with pica.

[edit] Popular culture

  • Michel Lotito has made a career in entertainment of eating chopped "inedibles" like a Cessna 150 small airplane.
  • A patient suffering from pica was featured in the season four premiere of Grey's Anatomy.
  • Jimmy Kimmel has suggested several times in his stand-up that G. Gordon Liddy suffers from pica and, as such, may have been Deep Throat.
  • In the House episode "Lines in the Sand", a severely autistic boy with pica is diagnosed with raccoon roundworms that he acquired from eating the sand in his sandbox.
  • In an interview with David Letterman, actress Kristen Bell deduces that her pet dog may have pica
  • In Gabriel García Márquez's book, One Hundred Years of Solitude, Rebeca eats earth and whitewash.
  • In Chapter 26 of John Steinbeck's Pulitzer Prize-winning 1939 novel, The Grapes of Wrath, the pregnant and malnourished Rose of Sharon is caught eating "a piece of slack lime", and her mother admits to eating coal when she was pregnant. (Read at Archive.org)
  • In the film Undertow (2004) a young boy suffers from Pica.
  • The Leeds band Sky Larkin have a song called Pica on their debut album The Golden Spike
  • In Law & Order: Special Victims Unit episode "Lead", the character Jeff Lynwood, played by John Gallagher, Jr., is found to have pica when he is seen eating a pencil while on trial.
  • The show "1000 Ways To Die" on Spike TV, which features bizarre deaths in world history, enacted a story about a French man who died from eating pieces of metal such as coins.

[edit] References

  1. ^ emedince.com article on "Eating Disorder: Pica"
  2. ^ Plunkett, Signe J. (2000). Emergency Procedures for the Small Animal Veterinarian. Elsevier Health Sciences. pp. 11. ISBN 0702024872. 
  3. ^ Feldman, Bernard F.; Joseph G. Zinkl, Nemi Chand Jain, Oscar William Schalm (2000). Schalm's Veterinary Hematology. Blackwell Publishing. pp. 506. ISBN 0683306928. 
  4. ^ Why Kenyan women crave stones BBC News

[edit] External links


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