juvenile xanthogranuloma

A non-Langerhans-cell histiocytosis is characterized as a benign skin lump or bump caused by a collection of cells called histiocytes. These may be red, orange or tan at first, but over time may become more yellow in color. These bumps usually appear on the head, neck and trunk.

Charcot-Marie-Tooth disease intermediate type

A Charcot-Marie-Tooth disease characterized by motor conduction velocities above and below 38 m/s.

primary localized cutaneous amyloidosis 1

A primary cutaneous amyloidosis that has_material_basis_in heterozygous mutation in the gene encoding oncostatin M receptor-beta (OSMR) on chromosome 5p13.

selective IgM deficiency disease

A selective immunoglobulin deficiency disease thatis a dysgammaglobulinemia resulting from decreased levels of immunoglobulin M (IgM) production to roduction of other antibodies.

androgenic alopecia

An alopecia that is characterized by M-shaped hair line recession and thinning of hair at the crown of the head in males.

indolent plasma cell myeloma

A multiple myeloma that is characterized by M protein in serum and/or urine and evidence of organ damage related the plasma cell neoplasm.

lymphoplasmacytic lymphoma

A B-cell lymphoma characterized by the accumulation of monoclonal cells in the bone marrow and peripheral lymphoid tissues, and associated with the production of serum immunoglobulin M (IgM) monoclonal protein.

CD40 ligand deficiency

A combined T cell and B cell immunodeficiency that is a X-linked immunodeficiency with hyperimmunoglobulin M (XHIM) affecting isotype switching and is caused by the absence of CD40 ligand which is normally expressed on activated CD4+ T cells. Individuals with this mutation are unable to switch from IgM to IgG, IgA and IgE.