Systemic mast cell disease (SMCD)

2000-06-01   Lidia Larizza , Lidia Larizza 

1.Medical Genetics, San Paolo School of Medicine, University of Milan Via A. di Rudini, 8, 20142 Milano, Italy

Clinics and Pathology

Phenotype stem cell origin

mast cell


involvement of KIT/SCF has been demonstrated in a few cases, but the diversity of the clinical pattern has not yet been elucidated;increased soluble SCF has been reported in the skin of patient with indolent mastocytosis; c-KIT mutations have been identified in patients with all forms of sporadic mastocytosis.


  • indolent mastocytosis involves the skin, bone marrow and gastrointestinal tract; clinical features range from a single cutaneous nodule to multiple pigmented macules resulting from increased epidermal melanin and papules (urticaria pigmentosa) or diffuse cutaneous involvement; bullae, vescicles and abnormal telangiectasia may be seen; gastrointestinal involvement leads to symptoms such as nausea, vomiting and abdominal pain.
  • in mastocytosis with an associated hematological disorder the urticaria pigmentosa symptoms are accompanied by a variety of haematological findings due to mast cell infiltrates to bone marrow, spleen, liver and lymph nodes.
  • mast cell leukemia is characterized by proliferation and infiltration of immature mast cells in bone marrow, peripheral blood and various extramedullary tissues.
  • aggressive mastocytosis is characterized by aggressive involvement of several haematopoietic organs
  • Pathology

    accumulation of mast cells in various organs and release of mast cell mediators which are responsible for the different clinical signs


    highly dependent on the form being severe, often fatal, in all types with the exception of the indolent form


    Pubmed IDLast YearTitleAuthors
    97147031998In vivo differentiation of mast cells from acute myeloid leukemia blasts carrying a novel activating ligand-independent C-kit mutation.Beghini A et al
    76918851993Identification of mutations in the coding sequence of the proto-oncogene c-kit in a human mast cell leukemia cell line causing ligand-independent activation of c-kit product.Furitsu T et al
    76822881993Altered metabolism of mast-cell growth factor (c-kit ligand) in cutaneous mastocytosis.Longley BJ Jr et al
    85897241996Somatic c-KIT activating mutation in urticaria pigmentosa and aggressive mastocytosis: establishment of clonality in a human mast cell neoplasm.Longley BJ et al
    74798401995Identification of a point mutation in the catalytic domain of the protooncogene c-kit in peripheral blood mononuclear cells of patients who have mastocytosis with an associated hematologic disorder.Nagata H et al
    90290281997A new c-kit mutation in a case of aggressive mast cell disease.Pignon JM et al
    158789762005Bcl10 can promote survival of antigen-stimulated B lymphocytes.Tian MT et al



    mastocytosis is a heterogeneous clinical entity which is classified into four categories:
    1- indolent mastocytosis (the most common form),
    2- mastocytosis with an associated hematologic disorder,
    3- mast cell leukemia and
    4- aggressive mastocytosis


    Lidia Larizza ; Lidia Larizza

    Systemic mast cell disease (SMCD)

    Atlas Genet Cytogenet Oncol Haematol. 2000-06-01

    Online version:

    Historical Card

    1998-09-01 Systemic mast cell disease (SMCD) by  Alessandro Beghini,Lidia Larizza 

    Medical Genetics, San Paolo School of Medicine, University of Milan Via A. di Rudini, 8, 20142 Milano, Italy

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