<unk> <unk> s in<unk> . Light microscopy X450. Histologically<unk>  shows mainly<unk> <unk> s. 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<unk> <unk>  inflammatory infiltration into the connective tissue. The epithelium shows spongiosis. Some consider that<unk> acanthoma (solitary<unk> <unk>  tumor) is part of the same spectrum of disease as<unk> <unk>  cheilitis. Classification Depending upon the site of involvement, this condition could be considered a type of<unk>  (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 <unk> -cell gingivostomatitis"). The mucous membranes of the genitals can also be involved by a similar condition, termed<unk> <unk>  balanitis" or<unk> <unk>  vulvitis". Other synonyms for this condition not previously mentioned include atypical<unk> , allergic<unk> ,<unk> cytosis of the gingiva, idiopathic gingivostomatitis, and atypical gingivostomatitis. Some of these terms are largely historical.<unk>  has been subclassified into 3 types based upon the cause; namely, allergic, neoplastic and of unknown cause.
Plasma cell gingivitis
Denture-related stomatitis
Occupational acne
Contact stomatitis
Nutritional deficiency eczema
Steroid rosacea
Noxzema
Contact granuloma