Rare condition in Brazil town popular for cousin marriage

Giulia Granchi and Vitor Tavares

BBC Brasil reporters sent to Serrinha dos Pintos

Mariana Castiñeiras/Caroline Souza Silvana Santos is shown in a green patterned dress in this designed image, with three patients with Spoan disease shown in a bordered image in the background.Mariana Castiñeiras/Caroline Souza

Affected families in Serrinha dos Pintos lived without a diagnosis until geneticist Silvana Santos arrived

Before Silvana Santos…

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