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Less common causes of lactose intolerance include:
Less common causes of lactose intolerance include:
* Secondary lactose malabsorption<ref name="pmid9742907">{{cite journal |vauthors=Srinivasan R, Minocha A |title=When to suspect lactose intolerance. Symptomatic, ethnic, and laboratory clues |journal=Postgrad Med |volume=104 |issue=3 |pages=109–11, 115–6, 122–3 |year=1998 |pmid=9742907 |doi=10.3810/pgm.1998.09.577 |url=}}</ref>
* Secondary lactose malabsorption<ref name="pmid9742907">{{cite journal |vauthors=Srinivasan R, Minocha A |title=When to suspect lactose intolerance. Symptomatic, ethnic, and laboratory clues |journal=Postgrad Med |volume=104 |issue=3 |pages=109–11, 115–6, 122–3 |year=1998 |pmid=9742907 |doi=10.3810/pgm.1998.09.577 |url=}}</ref>
** Small intestinal bacterial overgrowth
** Infections such as giardiasis 
** Infections such as giardiasis 
** Drug induced enteritis
** Drug induced enteritis

Revision as of 14:51, 30 November 2017

Lactose Intolerance Microchapters

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Overview

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Pathophysiology

Causes

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Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Diagnosis

Diagnostic Study of Choice

History and Symptoms

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Risk calculators and risk factors for Lactose intolerance causes

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 disease name, however complications resulting from untreated disease name is common.
  • Life-threatening causes of [symptom/manifestation] include [cause1], [cause2], and [cause3].
  • [Cause] is a life-threatening cause of [disease].

Common Causes

Lactose intolerance may be caused by:

  • Acquired primary lactase deficiency ( lactase nonpersistence, adult-type hypolactasia)


  • [Disease name] is caused by an infection with [pathogen name].
  • [Pathogen name] is caused by [pathogen name].

Less Common Causes

Less common causes of lactose intolerance include:

  • Secondary lactose malabsorption[1]
    • Small intestinal bacterial overgrowth
    • Infections such as giardiasis 
    • Drug induced enteritis
    • Radiation induced enteritis
    • HIV enteropathy
    • Sprue (celiac and tropical)
    • Whipple's disease (intestinal lipodystrophy)
    • Severe gastroenteritis
    • Carcinoid syndrome
    • Cystic fibrosis
    • Diabetic gastropathy
    • Kwashiorkor
    • Zollinger-Ellison syndrome
    • Iatrogenic such as chemotherapy 
  • Congenital lactase deficiency
  • Developmental lactase deficiency

Genetic Causes

  • Lactose intolerance is caused by a mutation in the lactase-phlorizin hydrolase (LPH) gene

Causes by Organ System

Cardiovascular No underlying causes
Chemical/Poisoning No underlying causes
Dental No underlying causes
Dermatologic No underlying causes
Drug Side Effect No underlying causes
Ear Nose Throat No underlying causes
Endocrine No underlying causes
Environmental No underlying causes
Gastroenterologic No underlying causes
Genetic No underlying causes
Hematologic No underlying causes
Iatrogenic No underlying causes
Infectious Disease No underlying causes
Musculoskeletal/Orthopedic No underlying causes
Neurologic No underlying causes
Nutritional/Metabolic No underlying causes
Obstetric/Gynecologic No underlying causes
Oncologic No underlying causes
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 No underlying causes
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. 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.

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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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