Next, we investigated whether the same findings of defective PINK1‐PRKN‐mediated mitophagy in the fibroblast cell line from a patient with EPG5‐parkinsonism are found in fibroblast cell lines from patients with milder EPG5‐related disorders at earlier ages and without parkinsonism at time of biopsy (p.Gln336Arg and p.Arg1621Gln). Here, PINK1 is linked to Parkinson disease.