Lactose intolerance causes

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Lactose Intolerance Microchapters

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Patient Information

Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Lactose Intolerance from Other Diseases

Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Diagnosis

Diagnostic Study of Choice

History and Symptoms

Physical Examination

Laboratory Findings

Electrocardiogram

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Case #1

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mahda Alihashemi M.D. [2]

Overview

Disease name] may be caused by [cause1], [cause2], or [cause3].

OR

Common causes of [disease] include [cause1], [cause2], and [cause3].

OR

The most common cause of [disease name] is [cause 1]. Less common causes of [disease name] include [cause 2], [cause 3], and [cause 4].

OR

The cause of [disease name] has not been identified. To review risk factors for the development of [disease name], click here.

Causes

Life-threatening Causes

  • Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated. There are no life-threatening causes of lactose intolerance.

Common Causes

Lactose intolerance may be caused by:

  • Acquired primary lactase deficiency ( lactase nonpersistence, adult-type hypolactasia)[1][2]

Less Common Causes

Less common causes of lactose intolerance include:

Genetic Causes

  • Lactose intolerance is caused by a mutation in the lactase-phlorizin hydrolase (LPH) gene.[9][10][11]

Causes by Organ System

Cardiovascular No underlying causes
Chemical/Poisoning No underlying causes
Dental No underlying causes
Dermatologic Celiac sprue,
Drug Side Effect Drug induced enteritis,
Ear Nose Throat No underlying causes
Endocrine Carcinoid syndrome,
Environmental No underlying causes
Gastroenterologic Acquired primary lactase deficiency, Small intestinal bacterial overgrowth, Drug induced enteritis, Radiation induced enteritis, HIV enteropathy, Tropical sprue, Celiac sprue, Whipple's disease, Gastroenteritis, Carcinoid syndrome
Genetic Celiac sprue,
Hematologic No underlying causes
Iatrogenic Radiation induced enteritis,
Infectious Disease Infections such as giardiasis, HIV enteropathy, Tropical sprue, Whipple's disease,
Musculoskeletal/Orthopedic No underlying causes
Neurologic No underlying causes
Nutritional/Metabolic Celiac sprue,
Obstetric/Gynecologic No underlying causes
Oncologic Carcinoid syndrome,
Ophthalmologic No underlying causes
Overdose/Toxicity No underlying causes
Psychiatric No underlying causes
Pulmonary No underlying causes
Renal/Electrolyte No underlying causes
Rheumatology/Immunology/Allergy Celiac sprue
Sexual No underlying causes
Trauma No underlying causes
Urologic No underlying causes
Miscellaneous No underlying causes

Causes in Alphabetical Order

List the causes of the disease in alphabetical order.

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3

References

  1. Enattah NS, Sahi T, Savilahti E, Terwilliger JD, Peltonen L, Järvelä I (2002). "Identification of a variant associated with adult-type hypolactasia". Nat. Genet. 30 (2): 233–7. doi:10.1038/ng826. PMID 11788828.
  2. Tishkoff SA, Reed FA, Ranciaro A, Voight BF, Babbitt CC, Silverman JS, Powell K, Mortensen HM, Hirbo JB, Osman M, Ibrahim M, Omar SA, Lema G, Nyambo TB, Ghori J, Bumpstead S, Pritchard JK, Wray GA, Deloukas P (2007). "Convergent adaptation of human lactase persistence in Africa and Europe". Nat. Genet. 39 (1): 31–40. doi:10.1038/ng1946. PMC 2672153. PMID 17159977.
  3. Srinivasan R, Minocha A (1998). "When to suspect lactose intolerance. Symptomatic, ethnic, and laboratory clues". Postgrad Med. 104 (3): 109–11, 115–6, 122–3. doi:10.3810/pgm.1998.09.577. PMID 9742907.
  4. Misselwitz B, Pohl D, Frühauf H, Fried M, Vavricka SR, Fox M (2013). "Lactose malabsorption and intolerance: pathogenesis, diagnosis and treatment". United European Gastroenterol J. 1 (3): 151–9. doi:10.1177/2050640613484463. PMC 4040760. PMID 24917953.
  5. Swagerty DL, Walling AD, Klein RM (2002). "Lactose intolerance". Am Fam Physician. 65 (9): 1845–50. PMID 12018807.
  6. Mishkin B, Yalovsky M, Mishkin S (1997). "Increased prevalence of lactose malabsorption in Crohn's disease patients at low risk for lactose malabsorption based on ethnic origin". Am. J. Gastroenterol. 92 (7): 1148–53. PMID 9219788.
  7. Saarela T, Similä S, Koivisto M (1995). "Hypercalcemia and nephrocalcinosis in patients with congenital lactase deficiency". J. Pediatr. 127 (6): 920–3. PMID 8523189.
  8. Mobassaleh M, Montgomery RK, Biller JA, Grand RJ (1985). "Development of carbohydrate absorption in the fetus and neonate". Pediatrics. 75 (1 Pt 2): 160–6. PMID 2578223.
  9. Enattah NS, Sahi T, Savilahti E, Terwilliger JD, Peltonen L, Järvelä I (2002). "Identification of a variant associated with adult-type hypolactasia". Nat. Genet. 30 (2): 233–7. doi:10.1038/ng826. PMID 11788828.
  10. Kuokkanen M, Enattah NS, Oksanen A, Savilahti E, Orpana A, Järvelä I (2003). "Transcriptional regulation of the lactase-phlorizin hydrolase gene by polymorphisms associated with adult-type hypolactasia". Gut. 52 (5): 647–52. PMC 1773659. PMID 12692047.
  11. Rasinperä H, Savilahti E, Enattah NS, Kuokkanen M, Tötterman N, Lindahl H, Järvelä I, Kolho KL (2004). "A genetic test which can be used to diagnose adult-type hypolactasia in children". Gut. 53 (11): 1571–6. doi:10.1136/gut.2004.040048. PMC 1774274. PMID 15479673.

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Lactose Intolerance Microchapters

Home

Patient Information

Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Lactose Intolerance from Other Diseases

Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Diagnosis

Diagnostic Study of Choice

History and Symptoms

Physical Examination

Laboratory Findings

Electrocardiogram

Chest X Ray

CT

MRI

Echocardiography or Ultrasound

Other Imaging Findings

Other Diagnostic Studies

Treatment

Medical Therapy

Surgery

Primary Prevention

Secondary Prevention

Cost-Effectiveness of Therapy

Future or Investigational Therapies

Case Studies

Case #1

Lactose intolerance causes On the Web

Most recent articles

Most cited articles

Review articles

CME Programs

Powerpoint slides

Images

American Roentgen Ray Society Images of Lactose intolerance causes

All Images
X-rays
Echo & Ultrasound
CT Images
MRI

Ongoing Trials at Clinical Trials.gov

US National Guidelines Clearinghouse

NICE Guidance

FDA on Lactose intolerance causes

CDC on Lactose intolerance causes

Lactose intolerance causes in the news

Blogs on Lactose intolerance causes

Directions to Hospitals Treating Lactose intolerance

Risk calculators and risk factors for Lactose intolerance causes

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [3]

Overview

Causes

Some causes of lactose intolerance are well known. Primary lactase deficiency is a condition that develops over time. After about age 2 the body begins to produce less lactase, though most people will not notice symptoms until they are much older. Secondary lactase deficiency occurs when injury to the small intestine or certain digestive diseases reduce the amount of lactase a person produces. These diseases include celiac disease, inflammatory bowel disease, and Crohn’s disease.

References

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