TY - JOUR AU - Silva, Cláudia Teles AU - Madureira, Cristina AU - Melo, Cláudia AU - Martins, Cecília AU - Cardoso, Raquel AU - Miguel, Cristina PY - 2019/01/02 Y2 - 2024/03/28 TI - Hypotonia and feeding problems in the newborn: a congenital myotonic dystrophy type 1 clinical case JF - NASCER E CRESCER - BIRTH AND GROWTH MEDICAL JOURNAL JA - REVNEC VL - 27 IS - 4 SE - Case Reports DO - 10.25753/BirthGrowthMJ.v27.i4.12046 UR - https://revistas.rcaap.pt/nascercrescer/article/view/12046 SP - 246-248 AB - <p align="justify"><strong>Introduction:</strong> Congenital myotonic dystrophy type 1 (DM1) is characterized by hypotonia and severe general weakness at birth, often with respiratory distress and even death.<br> <strong>Clinical report:</strong>A newborn male with prenatal diagnosis of ventriculomegaly and polyhydramnios was born at 39 weeks of gestation with no immediate occurrences and a maternal family history of two cases with unspecified neuromuscular conditions. The newborn was admitted in the second day of life due to feeding problems and desaturation episodes, presenting with hypotonia, non-vigorous crying, facial diplegia, and arthrogryposis of the lower limbs. A genetic study for myotonic dystrophy was requested, which revealed cytosine thiamine and guanine (CTG) expansion in the DMPK gene (1100−1400 repeats), confirming diagnosis of congenital DM1.<br> <strong>Discussion and conclusions: </strong>Despite the presence of congenital DM1, this newborn presents with a milder phenotype than expected for the condition. Symptom recognition, combined with family history, allowed an early diagnosis and adequate follow-up.</p> ER -