Gardner's syndrome

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Gardner's syndrome
Other namesFamilial colorectal polyposis,
Familial polyposis of the colon
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Specialty Gastroenterology, oncology, medical genetics   OOjs UI icon edit-ltr-progressive.svg

Gardner's syndrome (also known as Gardner syndrome, familial polyposis of the colon, [1] or familial colorectal polyposis [2] ) is a subtype of familial adenomatous polyposis (FAP). Gardner syndrome is an autosomal dominant form of polyposis characterized by the presence of multiple polyps in the colon together with tumors outside the colon. [3] The extracolonic tumors may include osteomas of the skull, thyroid cancer, epidermoid cysts, fibromas, [4] as well as the occurrence of desmoid tumors in approximately 15% of affected individuals.

Contents

Desmoid tumors are fibrous tumors that usually occur in the tissue covering the intestines and may be provoked by surgery to remove the colon. The countless polyps in the colon predispose to the development of colon cancer; if the colon is not removed, the chance of colon cancer is considered to be very significant. Polyps may also grow in the stomach, duodenum, spleen, kidneys, liver, mesentery, and small bowel. In a small number of cases, polyps have also appeared in the cerebellum. Cancers related to Gardner syndrome commonly appear in the thyroid, liver and kidneys. The number of polyps increases with age, and hundreds to thousands of polyps can develop in the colon.

The syndrome was first described in 1951. [5] There is no cure at this time, and in its more advanced forms, it is considered a terminal diagnosis with a life expectancy of 35–45 years; treatments are surgery and palliative care, although some chemotherapy has been tried with limited success. [6]

Cause

Gardner syndrome is caused by mutation in the adenomatous polyposis coli (APC gene), located in chromosome 5q21 (band q21 on chromosome 5). [3] This gene is also mutant in familial adenomatous polyposis (FAP), a more common disease that also predisposes to colon cancer. Nuances in the understanding of genetics have caused some disorders to be split into multiple entities, while others merged into one genetic condition. After most of the second half of the 20th century, Gardner syndrome has been merged into FAP and is now considered simply a phenotypic subtype of FAP. [7] FAP is defined by the development of hundreds or thousands of polyps in the colon. Gardner syndrome is set apart as a subtype because, in addition to colonic polyps, there are also extra-colonic growths (both malignant and benign). [8] There are many terms used to describe "APC-associated polyposis condition" including FAP, attenuated FAP, Gardner syndrome, Turcot syndrome, and gastric adenocarcinoma and proximal polyposis of the stomach (GAPPS). There is a movement toward no longer using the terms Gardner Syndrome or Turcot Syndrome since both are part of the FAP spectrum. Gardner syndrome and Turcot syndrome are regarded primarily for historical interest. [9]

Genetics

Gardner syndrome has an autosomal dominant pattern of inheritance. Autosomal dominant - en.svg
Gardner syndrome has an autosomal dominant pattern of inheritance.

Gardner syndrome is inherited in an autosomal dominant manner. [3] Typically, one parent has Gardner syndrome. Each of their children, male and female alike, are at 50% risk of inheriting the gene for Gardner syndrome.[ citation needed ]

Diagnosis

Gardner syndrome consists of adenomatous polyps of the gastrointestinal tract, Gardner fibromas, desmoid tumors, osteomas, epidermoid cysts, lipomas, dental abnormalities, and periampullary carcinomas. The incidence of the syndrome is 1:14,025 with an equal sex distribution. It is determined by the autosomal dominant familial polyposis coli gene (APC) on chromosome 5. [5] [10]

Gardner syndrome can be identified based on oral findings, including multiple impacted and supernumerary teeth, multiple jaw osteomas that give a "cotton-wool" appearance to the jaws, as well as multiple odontomas, congenital hypertrophy of the retinal pigment epithelium (CHRPE), in addition to multiple adenomatous polyps of the colon. Gardner syndrome is also associated with familial adenomatous polyposis and may manifest as aggressive fibromatosis (desmoid tumors) of the retroperitoneum. [11]

Desmoid tumors arise most frequently from the aponeurosis of the rectus abdominal muscle of multiparous women. The extra-abdominal form is rare and desmoids of the breast may arise in the mammary gland or may occur as an extension of a lesion arising from the muscles of the chest wall. The incidence of mammary desmoid tumors is less than 0.2% of primary breast neoplasms. In Gardner's syndrome, the incidence ranges from 4% to 17%. Desmoid tumors associated with Gardner's syndrome have been shown to have an alteration of the β-catenin pathway and over express β-catenin. [5]

Treatment

There is no cure for Gardner Syndrome. Treatments focus on alleviating symptoms and reducing risk of cancer. Treatments for desmoid tumors may include surgery, NSAIDS, anti-estrogen medications, radiation therapy and chemotherapy. [6]

Eponym

The syndrome is named for Eldon J. Gardner (1909–1989), an American geneticist who first described it in 1951. [12]

See also

Related Research Articles

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<span class="mw-page-title-main">Aggressive fibromatosis</span> Medical condition

Aggressive fibromatosis or desmoid tumor is a rare condition. Desmoid tumors arise from cells called fibroblasts, which are found throughout the body and provide structural support, protection to the vital organs, and play a critical role in wound healing. These tumors tend to occur in women in their thirties, but can occur in anyone at any age. They can be either relatively slow-growing or malignant. However, aggressive fibromatosis is locally aggressive and can cause life-threatening problems or even death when they compress vital organs such as intestines, kidneys, lungs, blood vessels, or nerves. Most cases are sporadic, but some are associated with familial adenomatous polyposis (FAP). Approximately 10% of individuals with Gardner's syndrome, a type of FAP with extracolonic features, have desmoid tumors.

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<span class="mw-page-title-main">Colorectal polyp</span> Growth found in bowel wall

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Attenuated familial adenomatous polyposis is a form of familial adenomatous polyposis, a cancer syndrome. It is a pre-malignant disease that can develop into colorectal cancer. A patient will have fewer than a hundred polyps located typically in right side of the colon. Cancer might develop as early as the age of five, though typically presents later than classical FAP.

<span class="mw-page-title-main">Proliferating trichilemmal cyst</span> Medical condition

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<span class="mw-page-title-main">Cancer syndrome</span> Genetic condition that predisposes a person to cancer

A cancer syndrome, or family cancer syndrome, is a genetic disorder in which inherited genetic mutations in one or more genes predispose the affected individuals to the development of cancers and may also cause the early onset of these cancers. Cancer syndromes often show not only a high lifetime risk of developing cancer, but also the development of multiple independent primary tumors.

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MUTYH-associated polyposis is an autosomal recessive polyposis syndrome. The disorder is caused by mutations in both alleles of the DNA repair gene, MUTYH. The MUTYH gene encodes a base excision repair protein, which corrects oxidative damage to DNA. Affected individuals have an increased risk of colorectal cancer, precancerous colon polyps (adenomas) and an increased risk of several additional cancers. About 1–2 percent of the population possess a mutated copy of the MUTYH gene, and less than 1 percent of people have the MUTYH associated polyposis syndrome. The presence of 10 or more colon adenomas should prompt consideration of MUTYH-associated polyposis, familial adenomatous polyposis and similar syndromes.

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Gardner fibroma (GF) is a benign fibroblastic tumor. GF tumors typically develop in the dermis and adjacent subcutaneous tissue lying just below the dermis. These tumors typically occur on the back, abdomen, and other superficial sites but in rare cases have been diagnoses in internal sites such as the retroperitoneum and around the large blood vessels in the upper thoracic cavity. The World Health Organization, 2020, classified Gardner fibroma as a benign tumor in the category of fibroblastic and myofibroblastic tumors.

References

  1. ↑ Dermatology. Bolognia, Jean,, Schaffer, Julie V.,, Cerroni, Lorenzo (Fourth ed.). [Philadelphia, Pa.] 22 October 2017. p. 1031. ISBN   978-0-7020-6342-8. OCLC   1011508489.{{cite book}}: CS1 maint: others (link)
  2. ↑ Dermatology. Bolognia, Jean,, Schaffer, Julie V.,, Cerroni, Lorenzo (Fourth ed.). [Philadelphia, Pa.] 22 October 2017. p. 1223. ISBN   978-0-7020-6342-8. OCLC   1011508489.{{cite book}}: CS1 maint: others (link)
  3. 1 2 3 Online Mendelian Inheritance in Man (OMIM): 175100
  4. ↑ Luba MC, Bangs SA, Mohler AM, Stulberg DL (February 2003). "Common benign skin tumors". Am Fam Physician. 67 (4): 729–38. PMID   12613727. Archived from the original on 2008-05-16. Retrieved 2009-08-23.
  5. 1 2 3 Rammohan A, Wood JJ (2012). "Desmoid tumour of the breast as a manifestation of Gardner's syndrome". Int J Surg Case Rep. 3 (5): 139–142. doi:10.1016/j.ijscr.2012.01.004. PMC   3312056 . PMID   22370045.
  6. 1 2 "Gardner syndrome | Genetic and Rare Diseases Information Center (GARD) – an NCATS Program". rarediseases.info.nih.gov. Retrieved 17 April 2018.
  7. ↑ "Gardner Syndrome". Cancer.net. American Society of Clinical Oncology. 2012-06-26. Retrieved 8 July 2016.
  8. ↑ "Gardner syndrome | Genetic and Rare Diseases Information Center (GARD) – an NCATS Program". rarediseases.info.nih.gov. Retrieved 2018-09-20.
  9. ↑ "Gardner syndrome | Genetic and Rare Diseases Information Center (GARD) – an NCATS Program". rarediseases.info.nih.gov. Retrieved 2018-09-20.
  10. ↑ Baranov E, Hornick JL (March 2020). "Soft Tissue Special Issue: Fibroblastic and Myofibroblastic Neoplasms of the Head and Neck". Head and Neck Pathology. 14 (1): 43–58. doi:10.1007/s12105-019-01104-3. PMC   7021862 . PMID   31950474.
  11. ↑ DeVita. Cancer, Principles and Practice of Oncology, 8th Ed. p. 1742.
  12. ↑ Gardner EJ (June 1951). "A genetic and clinical study of intestinal polyposis, a predisposing factor for carcinoma of the colon and rectum". Am. J. Hum. Genet. 3 (2): 167–76. PMC   1716321 . PMID   14902760.
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