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Peudoainhum representa a formacao de aneis constritivos em redor de um ou varios dedos. Pode ser congenito ou adquirido e, neste caso,  pode estar associado a varias dermatoses como esclerose sistemica, queratodermias, psoriase, sindrome de Reynolds, entre outras. E apresentado o caso de uma mulher de 54 anos que foi referenciada por lesoes digitais anulares constritivas e microniquia no quarto e quinto dedos das maos associadas a acroesclerose distal bilateral. Salientava-se ainda a presenca de fenomeno de Raynaud ha varios anos e, mais recentes, fadiga e poliartralgias recorrentes de caracter inflamatorio e ainda de anticorpos antinucleares e anticorpo anti-U1 ribonucleoproteina. Desta forma, foi considerado o diagnostico de pseudoainhum associado a uma provavel doenca mista do tecido conjuntivo. E sabido que perante um caso de pseudoainhum, uma investigacao etiologica aturada deve ser levada a cabo incluindo o despiste de doencas autoimunes. A associacao de pseudoainhum com a doenca mista do tecido conjuntivo nao esta descrita na literatura, razao pela qual este caso e apresentado. The term pseudoainhum is used to describe constricting band(s) around one or more digits in relation to several congenital or acquired diseases. Systemic sclerosis, keratoderma, psoriasis, Reynolds syndrome among others, have been reported to be associated with pseudoainhum development. We report a case of a 54 years old woman with annular constricting bands and micronychia on the fourth and fifth digits of her both hands associated with bilateral distal acrosclerosis. Raynaud’s phenomenon with some years of evolution and, more recent, fatigue and recurrent inflammatory polyarthritis and also antinuclear and anti-U1 nuclear ribonucleoprotein antibodies were present. Therefore, the diagnoses of pseudoainhum with a likely association with mixed connective tissue disease were proposed. Whenever in the presence of pseudoainhum, a detailed workup, including autoimmune disorders screening, is mandatory in order to rule out possible associated syndromes or underlying diseases. The authors present this case as the association between pseudoainhum and mixed connective tissue disease has not been previously reported in the literature.

revista da sociedade portuguesa de dermatologia e venereologia

Pseudoainhum numa doente com Doença Mista do Tecido Conjuntivo: uma associação incomum Pseudoainhum in a patient with Mixed Connective Tissue Disease: an uncommon association