Assesses nailfold capillaroscopy to differentiate primary from secondary Raynaud phenomenon, highlighting its diagnostic role for systemic sclerosis.
Background Primary Raynaud's phenomenon (pRP) is difficult to distinguish from secondary (sRP). Although nailfold capillaroscopy (NFC) may detect early alterations, no universal criteria yet discriminate between pRP from sRP.
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Amaral et al. (2024) studied this question.
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