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Some disorders have some molecular or clinical features of myeloproliferative neoplasms (MPNs) but are missing clinical, morphological or molecular genetic data that allows for accurate classification into one of the standard MPN categories. These disorders are known as MPN, unclassifiable (MPN, unclassifiable) and are sometimes also called MPN, not otherwise specified (MPN/NOS). 


Richard T. Silver MD Myeloproliferative Neoplasms Center 525 East 70th St., Starr Pavillion, 3rd Floor New York, NY 10021