Find information on thousands of medical conditions and prescription drugs.

Aicardi syndrome

Aicardi syndrome is a congenital disorder thought to result from an abnormality of the X chromosome and characterized by absence of the corpus callosum, retinal abnormalities, and seizures (often infantile spasms). more...

Home
Diseases
A
Aagenaes syndrome
Aarskog Ose Pande syndrome
Aarskog syndrome
Aase Smith syndrome
Aase syndrome
ABCD syndrome
Abdallat Davis Farrage...
Abdominal aortic aneurysm
Abdominal cystic...
Abdominal defects
Ablutophobia
Absence of Gluteal muscle
Acalvaria
Acanthocheilonemiasis
Acanthocytosis
Acarophobia
Acatalasemia
Accessory pancreas
Achalasia
Achard syndrome
Achard-Thiers syndrome
Acheiropodia
Achondrogenesis
Achondrogenesis type 1A
Achondrogenesis type 1B
Achondroplasia
Achondroplastic dwarfism
Achromatopsia
Acid maltase deficiency
Ackerman syndrome
Acne
Acne rosacea
Acoustic neuroma
Acquired ichthyosis
Acquired syphilis
Acrofacial dysostosis,...
Acromegaly
Acrophobia
Acrospiroma
Actinomycosis
Activated protein C...
Acute febrile...
Acute intermittent porphyria
Acute lymphoblastic leukemia
Acute lymphocytic leukemia
Acute mountain sickness
Acute myelocytic leukemia
Acute myelogenous leukemia
Acute necrotizing...
Acute promyelocytic leukemia
Acute renal failure
Acute respiratory...
Acute tubular necrosis
Adams Nance syndrome
Adams-Oliver syndrome
Addison's disease
Adducted thumb syndrome...
Adenoid cystic carcinoma
Adenoma
Adenomyosis
Adenosine deaminase...
Adenosine monophosphate...
Adie syndrome
Adrenal incidentaloma
Adrenal insufficiency
Adrenocortical carcinoma
Adrenogenital syndrome
Adrenoleukodystrophy
Aerophobia
Agoraphobia
Agrizoophobia
Agyrophobia
Aicardi syndrome
Aichmophobia
AIDS
AIDS Dementia Complex
Ainhum
Albinism
Albright's hereditary...
Albuminurophobia
Alcaptonuria
Alcohol fetopathy
Alcoholic hepatitis
Alcoholic liver cirrhosis
Alektorophobia
Alexander disease
Alien hand syndrome
Alkaptonuria
Alliumphobia
Alopecia
Alopecia areata
Alopecia totalis
Alopecia universalis
Alpers disease
Alpha 1-antitrypsin...
Alpha-mannosidosis
Alport syndrome
Alternating hemiplegia
Alzheimer's disease
Amaurosis
Amblyopia
Ambras syndrome
Amelogenesis imperfecta
Amenorrhea
American trypanosomiasis
Amoebiasis
Amyloidosis
Amyotrophic lateral...
Anaphylaxis
Androgen insensitivity...
Anemia
Anemia, Diamond-Blackfan
Anemia, Pernicious
Anemia, Sideroblastic
Anemophobia
Anencephaly
Aneurysm
Aneurysm
Aneurysm of sinus of...
Angelman syndrome
Anguillulosis
Aniridia
Anisakiasis
Ankylosing spondylitis
Ankylostomiasis
Annular pancreas
Anorchidism
Anorexia nervosa
Anosmia
Anotia
Anthophobia
Anthrax disease
Antiphospholipid syndrome
Antisocial personality...
Antithrombin deficiency,...
Anton's syndrome
Aortic aneurysm
Aortic coarctation
Aortic dissection
Aortic valve stenosis
Apert syndrome
Aphthous stomatitis
Apiphobia
Aplastic anemia
Appendicitis
Apraxia
Arachnoiditis
Argininosuccinate...
Argininosuccinic aciduria
Argyria
Arnold-Chiari malformation
Arrhythmogenic right...
Arteriovenous malformation
Arteritis
Arthritis
Arthritis, Juvenile
Arthrogryposis
Arthrogryposis multiplex...
Asbestosis
Ascariasis
Aseptic meningitis
Asherman's syndrome
Aspartylglycosaminuria
Aspergillosis
Asphyxia neonatorum
Asthenia
Asthenia
Asthenophobia
Asthma
Astrocytoma
Ataxia telangiectasia
Atelectasis
Atelosteogenesis, type II
Atherosclerosis
Athetosis
Atopic Dermatitis
Atrial septal defect
Atrioventricular septal...
Atrophy
Attention Deficit...
Autoimmune hepatitis
Autoimmune...
Automysophobia
Autonomic dysfunction
Familial Alzheimer disease
Senescence
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Medicines

History

It was first described by Jean Aicardi, a french neurologist in 1965.

Epidemiology

There are about 500 cases worldwide, almost all of them in females, because it is thought to be lethal in otherwise genetically normal males. It has been identified in males with Klinefelter syndrome, who have an extra X chromosome.

Pathophysiology

Features

Children are most commonly identified with Aicardi Syndrome between the ages of three and five months. A significant number of these girls are products of normal births and seem to be developing normally until around the age of three months, when they begin to have infantile spasms. The onset of infantile spasms at this age is due to closure of the final neural synapses in the brain, a stage of normal brain development.

Prognosis varies widely, though all experience developmental delays of some degree, typically moderate to profound mental retardation. They are often happy, friendly girls, and many enjoy stimming with their hands.

Diagnosis

Aicardi syndrome is characterized by the following "markers":

  1. Absence of the Corpus callosum, either partial or complete (Agenesis of the corpus callosum).
  2. Infantile spasms
  3. Lesions or "lacunae" of the retina of the eye that are very specific to this disorder
  4. Other types of defects of the brain such as microcephaly, enlarged ventricles, or porencephalic cysts

Treatment

Treatment of Aicardi syndrome primarily involves management of seizures and early/continuing intervention programs for developmental delays.

Prognosis

The known age range of affected children is from birth to the mid 40’s.

Read more at Wikipedia.org


[List your site here Free!]


Colonic lymphoid hyperplasia in melanosis coli
From Archives of Pathology & Laboratory Medicine, 8/1/01 by Pearce, Callum B

* We describe the case of a patient with Rett syndrome, a syndrome characterized by progressive infant encephalopathy, developmental delay, dementia, autism, ataxia, microcephaly, spastic paraparesis, and autonomic neuropathy with constipation. At colonoscopy, multiple foci of tiny white, sessile, polypoid lesions were seen throughout the colon and rectum, mimicking the appearances of small hyperplastic or adenomatous polyps, associated with generalized melanosis coli. This is the first case to our knowledge describing melanosis coli in a patient with Rett syndrome. As melanosis pigment deposition is characteristically not seen in lymphoid tissue, the lymphoid tissue was identifiable at endoscopy as multiple white nodules mimicking generalized colonic polyposis throughout the colon. We discuss the likely mechanisms of lymphoid hyperplasia and coexistent melanosis coli in Rett syndrome.

(Arch Pathol Lab Med. 2001;125:1110-1112)

The patient we describe had Rett syndrome. This syndrome is characterized by progressive infant encephalopathy, developmental delay, dementia, autism, ataxia, microcephaly, spastic paraparesis, and autonomic neuropathy.1 Melanosis coli is a common endoscopic finding related to the use of anthracene-containing laxatives.2,3 Often, reticular areas are not stained because of the variation in pigment deposition. Mucosal lymphoid aggregates, adenomatous (dysplastic) mucosa, and cancers tend to show no accumulation of pigment, and therefore such foci appear endoscopically as white patches.4 We report the case of a patient with both Rett syndrome 5 and generalized melanosis coli. In this patient, colonoscopy showed diffuse nodular lymphoid hyperplasia of the large intestine that gave rise to a striking endoscopic appearance mimicking generalized colonic polyposis. We discuss the implications of this finding with respect to the known pathophysiology of Rett syndrome.

REPORT OF A CASE

A 40-year-old woman with Rett syndrome presented to her general practitioner with a long-standing history of abdominal pain, loss of appetite, and constipation requiring laxatives including senna. A complete blood count showed microcytic anemia that was subsequently attributed to menorrhagia. There was no clinical evidence of immunosuppression, and serum immunoglobulin levels and the results of a protein strip test were normal.

On examination, the patient had no palpable abdominal masses. The patient underwent flexible sigmoidoscopy and subsequent colonoscopy under general anesthesia because she had tolerated outpatient sigmoidoscopy poorly. These procedures revealed multiple white, sessile, nodular, polyplike lesions all less than 1 mm in size, scattered throughout the colon and rectum; in addition, the colon had an endoscopic appearance characteristic of melanosis coli (Figure 1). The results of gastroscopy and duodenal biopsy were normal. There was no evidence of villous abnormality or parasites on duodenal biopsy.

Colonic biopsies showed marked melanosis coli (Figure 2) with multiple foci of lymphoid follicular hyperplasia corresponding to the white nodular patches distributed throughout the colon and rectum (Figure 3). The lymphoid follicles did not stain for melanosis pigment, although there were multiple foci of melanosis pigment in the surrounding mucosa. The melanosis pigment was brown, finely granular, and periodic acid-Schiff positive, and it was present within macrophages in the lamina propria.

COMMENT

Colonic lymphoid hyperplasia is a common pathologic finding and is usually of no pathophysiologic significance. It has been described in a number of conditions including human immunodeficiency virus infection, Crohn disease, and hypogammaglobulinemia.4 In this case, the distribution of the melanosis pigment as shown in the endoscopic photograph (Figure 1) emphasizes the diffuse nature of the patient's diffuse nodular lymphoid hyperplasia of the colon and rectum.

Rett first discovered his eponymous syndrome in 1966, and Hagberg1 subsequently formulated diagnostic criteria for the syndrome in 1983. The syndrome results in a striking, progressive encephalopathy from the age of 7 to 18 months onward, before which normal development occurs. The developmental stagnation (standstill of developmental milestones in childhood) is followed by a rapid deterioration that initially progresses to severe dementia, autism, loss of purposeful use of the hands, jerky truncal ataxia, and microcephaly. After a period of stagnation, spastic paraparesis, vasomotor lower-limb disturbance, and epilepsy can occur. Rett syndrome is commonly associated with constipation.6 Constipation may be related to hypotonia or autonomic dysfunction, or it may be related to degenerative features that have been identified in the ultrastructure of the enteric ganglia from patients with Rett syndrome,7 although these features may be a nonspecific phenomenon.

To the best of our knowledge, neither lymphoid follicular hyperplasia nor melanosis coli has been previously described in patients with Rett syndrome. This is surprising because constipation and, by inference, laxative use with consequent melanosis coli must be common in patients with Rett syndrome. Melanosis coli characteristically involves all parts of the colon and rectum but tends to spare the regions of mucosa occupied by lymphoid nodules, polyps, and carcinomas.3 It has been recommended that during investigation of patients with melanosis coli for suspected mucosal lesions, biopsies should be taken of isolated areas lacking pigmentation if neoplasia is suspected.8 A possible explanation for the lack of published reports of melanosis coli in patients with Rett syndrome is that although Rett syndrome causes constipation, endoscopic examination of patients is probably unusual. Patients with Rett syndrome become easily upset by unfamiliar surroundings and situations and do not tolerate procedures well.

Anthraquinone laxatives have been documented to cause colonic structural damage; moreover, they are neurotoxins and presumably may affect intestinal ganglionic function and peristalsis.9 Large intestine mucosal lymphoid hyperplasia has been predominantly associated with immune system diseases,10 but there is no literature describing an association of immune deficiency with Rett syndrome.

Because patients with Rett syndrome characteristically experience constipation, it is logical to assume that melanosis coli must be common in these patients. The melanosis pigment spares lymphoid tissue. Therefore, in patients with generalized melanosis coli with other suspected mucosal pathology, it is imperative that biopsies of the suspect lesions be taken from nonmelanotic mucosa.

Dr Pearce is financially supported by Fresenius Ltd.

Accepted for publication March 2, 2001.

References

1. Hagberg B, Aicardi J, Dias K, Ramos 0. A progressive syndrome of autism, dementia, ataxia, and loss of purposeful hand use in girls. Rett's syndrome: report of 35 cases. Ann Neurol. 1983;14:471-479.

2. Ghiadially FN, Walley VM. Melanoses of the gastrointestinal tract. Histopathology. 1994;25:197-207.

3. Goldman H. Other inflammatory disorders of the intestines. In: Ming SC, Goldman H, eds. Pathology of the Gastrointestinal Tract. Baltimore. Md: Williams and Wilkins; 1998:719-753.

4. Bharadhwaj G, Triadafilopoulos G. Endoscopic appearances of colonic lymphoid nodules: new faces of an old histopathological entity. Am J Gastroenterol. 1995;90:946-950.

5. Rett A. Uber ein eigenartiges hirnatrophisches Syndrom bei Hyperammoniamie in Kindesalter. Wien Med Wschr. 1966;116:723-738.

6. Budden SS. Rett syndrome: habilitation and management reviewed. Eur Child Adolesc Psychiatry. 1997;6(suppl):103-107.

7. Malandrini A, Hayek G, Villanova M, et al. Ultrastructural study of enteric ganglia in three patients with Rett syndrome. Brain Dev. 1998;20:586-588.

8. Davila AD, Willenbucher RF. Other diseases of the colon and rectum. In: Feldman M, Scharschmidt BF, Sleisenger MH, eds. Gastrointestinal and Liver Disease. New York, NY: WB Saunders; 1998:1977-2006.

9. Nelemans FA. Clinical and toxicological aspects of anthraquinone laxatives. Pharmacology. 1976:14(suppl 1):73-77.

10. Ell SR, Frank PH. Spectrum of lymphoid hyperplasia: colonic manifestations of sarcoidosis, infectious mononucleosis, and Crohn's disease. Gastrointest Radio]. 1981;6:329-332.

Callum B. Pearce, MB ChB, MRCPI; Hilary Martin, MB BS; Hamish D. Duncan, MD, MRCP; Patrick M. Goggin, MD, FRCP; David N. Poller, MD, MRCPath

From the Queen Alexandra Hospital, Portsmouth, United Kingdom.

Reprints: David N. Poller, MD, MRCPath, Consultant Pathologist, Queen Alexandra Hospital, Portsmouth P06 3LY, United Kingdom (e-mail: david@poller.demon.co.uk).

Copyright College of American Pathologists Aug 2001
Provided by ProQuest Information and Learning Company. All rights Reserved

Return to Aicardi syndrome
Home Contact Resources Exchange Links ebay