Unfavorable Shimada Classification

Patients of any age with stroma-poor tumors, undifferentiated or differentiated neuroblasts, and a mitosis-karyorrhexis index of more than 200; or patients older than 18 months with stroma-poor tumors, undifferentiated neuroblasts, and a mitosis-karyorrhexis index of 100-200; or patients older than 60 months with stroma-poor tumors, differentiated neuroblasts, and a mitosis-karyorrhexis index of less than 100. (NCI Thesaurus)

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Unfavorable

Expressing something as negative, undesired or adverse.

Unexpected Therapeutic Result

Issue associated with the use of a medical device for therapeutic purposes.

Unexpected Reason Code

A coded value specifying the rationale for why an unanticipated activity or event occurred.

Unexpected Adverse Event

Any adverse event associated with a medical product or procedure that has not been previously observed, whether or not the event was…

Unevaluable

Unable to be evaluated.

Unequivocal Progression

An overall level of substantial worsening in non-target disease that is of a magnitude that, even in the presence of SD or…