Complex sentence: If it is elevated in a single narrow "spike-like" manner it could indicate monoclonal production of a single immunoglobulin (monoclonal gammopathy), while a broad "swell-like" manner (wide) indicates polyclonal immunoglobulin production.
Split into simpler sentences: If it is elevated in a single narrow "spike-like" manner it could indicate monoclonal production of a single immunoglobulin (monoclonal gammopathy). A broad "swell-like" manner (wide) indicates polyclonal immunoglobulin production.