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In page Mucinous cystadenocarcinoma of the lung:

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MCACL has a much more favorable prognosis than most other forms of adenocarcinoma and most other NSCLC's.[1][2] Cases have been documented of continued growth of these lesions over a period of 10 years without symptoms or metastasis.[3] The overall mortality rate appears to be somewhere in the vicinity of 18% to 27%, depending on the criteria that are used to define this entity.[4]