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Taking over the Atlas
Dear Colleagues,
The Atlas, once more, is in great danger, and I will have to proceed to a collective economic lay-off of all the team involved in the Atlas before the begining of April 2015 (a foundation having suddenly withdrawn its commitment to support the Atlas). I ask you herein if any Scientific Society (a Society of Cytogenetics, of Clinical Genetics, of Hematology, or a Cancer Society, or any other...), any University and/or Hospital, any Charity, or any database would be interested in taking over the Atlas, in whole or in part. If taking charge of the whole lot is too big, a consortium of various actors could be the solution (I am myself trying to find partners). Could you please spread the information, contact the relevant authorities, and find partners.
Survival of the Atlas will be critically dependant upon your ability to find solutions (and urgently!).
Kind regards.
Jean-Loup Huret
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Lhermitte-Duclos disease


Other namesDysplastic gangliocytoma of the cerebellum
Note Lhermitte-Duclos disease may either be considered as a Cancer Prone disease (herein described) with an autosomal dominant inheritance mode or as a Solid Tumor on itself (see Dysplastic gangliocytoma of the cerebellum).
Inheritance Sporadic, or autosomal dominant if associated with Cowden disease


Phenotype and clinics
  • Lhermitte-Duclos disease consists in the occurrence of a slowly enlarging mass within the cerebellar cortex corresponding histologically to a cerebellar hamartoma.
  • Clinical manifestations are commonly a long standing history of vague defined neurological symptoms related to raised intracanial pressure and cerebellar signs affecting usually a young adult.
  • Diagnosis is based on cerebral imaging methods, mainly NMR-imaging.
  • Therapy consists of decompression of the posterior fossa by total surgical removal of the tumour mass.
  • Histopathological finding confirm the diagnosis of dysplastic gangliocytoma of the cerebellum in front of a hamartoma lesion with widening of the molecular layer occupied by abnormal ganglion cells, absence of Purkinje cell layer and hypertrophy of granular layer.
  • Related syndromes: Association with other lesions such as macrocephaly, polydactylia, multiple hemangioma, goiter, intestinal polyps was often observed. One case of familial cluster was reported. In fact, many cases of dysplastic cerebellar gangliocytoma are related to Cowden disease and such patients show various finding of this autosomal dominant condition with variable expression.
  • Neoplastic risk In cases of Lhermitte-Duclos related to a Cowden disease, malignant tumours characterizing this affection (mainly breast carcinoma and thyroid carcinoma) can occur.

    Genes involved and Proteins

    Gene NamePTEN (or MMAC1 or TEP1) in cases related to Cowden disease.
    Location 10q23
    Expression 403 amino-acids, phosphatase with tumor suppressive effects, negative regulator of the PI3K/Akt signal cell pathway by dephosphorylating PIP3

    External links

    OrphanetLhermitte-Duclos disease


    Sur un ganglioneurome diffus du cortex du cervelet.
    Lhermitte J, Duclos P
    Bull Assoc Fr Etud Cancer. 1920 ; 9 : 99-107.
    Lhermitte-Duclos disease (granule cell hypertrophy of the cerebellum) pathological analysis of the first familial cases.
    Ambler M, Pogacar S, Sidman R
    Journal of neuropathology and experimental neurology. 1969 ; 28 (4) : 622-647.
    PMID 5345120
    Lhermitte-Duclos disease and Cowden disease: a single phakomatosis.
    Padberg GW, Schot JD, Vielvoye GJ, Bots GT, de Beer FC
    Annals of neurology. 1991 ; 29 (5) : 517-523.
    PMID 1859181
    Lhermitte-Duclos disease (Dysplastic gangliocytoma of the cerebellum).
    Nowak DA, Trost HA, Porr A, Stolzle A, Lumenta CB
    Clinical neurology and neurosurgery. 2001 ; 103 (2) : 105-110.
    PMID 11516554
    REVIEW articlesautomatic search in PubMed
    Last year articlesautomatic search in PubMed


    Written10-2001Michel Longy


    This paper should be referenced as such :
    Longy, M
    Lhermitte-Duclos disease
    Atlas Genet Cytogenet Oncol Haematol. 2002;6(1):58-58.
    Free journal version : [ pdf ]   [ DOI ]
    URL :

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    indexed on : Sat Mar 28 12:10:20 CET 2015

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