The differential diagnosis is with acute leukemia and multiple myeloma. Hence, blood tests are often involved in ruling out other conditions. A biopsy is usually taken, and allergy testing may also be used. The histopathologic appearance is characterized by diffuse, sub-epithelial plasma cell inflammatory infiltration into the connective tissue. The epithelium shows spongiosis. Some consider that plasmoacanthoma (solitary plasma cell tumor) is part of the same spectrum of disease as plasma cell cheilitis. Depending upon the site of involvement, this condition could be considered a type of gingivitis (or gingival enlargement); a type of cheilitis; glossitis; or stomatitis. Sometimes the lips, the gums and the tongue can simultaneously be involved, and some authors have described this triad as a syndrome ("plasma-cell gingivostomatitis"). The mucous membranes of the genitals can also be involved by a similar condition, termed "plasma cell balanitis" or "plasma cell vulvitis". Other synonyms for this condition not previously mentioned include atypical gingivitis, allergic gingivitis, plasmacytosis of the gingiva, idiopathic gingivostomatitis, and atypical gingivostomatitis. Some of these terms are largely historical. Plasma cell gingivits has been subclassified into 3 types based upon the cause; namely, allergic, neoplastic and of unknown cause. Preventing exposure to the causative antigen leads to resolution of the condition. Tacrolimus or clobetasol propionate have also been used to treat plasma cell cheilitis. Plasma cell gingivits is rare, and plasma cell cheilitis is very rare. Most people with plasma cell cheilitis have been elderly. Plasma cell gingivitis was first described in the late 1960-early 1970s. A wave of cases occurred during this period, thought to be caused by allergic reactions to a component in chewing gum. Since, the number of cases has decreased, but they are still occasionally reported. Dan Murray (baseball)  Daniel Saffle Murray (born November 21, 1973) is a former Major League Baseball pitcher who played for two seasons. He pitched in one game for the New York Mets in 1999 and pitched in 14 games for the Kansas City Royals from 1999 to 2000.      89th Street (Manhattan)  89th Street is a one-way street running westbound from the East River to Riverside Drive, overlooking the Hudson River, in the New York City borough of Manhattan.