Assertion: pigmented melanoma | /r/CreatedBy | advanced stage
Facets:
value: at diagnosis
type: TEMPORAL
value: due to difficulty of diagnosis
type: CAUSE
Source sentences:
text: Survival after diagnosis of amelanotic melanoma was found in a 2014 seven-year study of 3,000 patients to be poorer than for pigmented melanoma, which was attributed to the more advanced stage at diagnosis due probably to difficulty of diagnosis.