FBL and systemic sclerosis: In this study, seven of the 106 samples of SSc patients (6.6%) gave an inconclusive result in the Fibrillarin/CBA test at initial 1/80 dilution, including four samples with dense fine speckled cytoplasmic pattern (AC-19) in standard HEp-2 IFA (none of those seven samples presented nucleolar pattern in the standard HEp-2 IFA).