Affected infants may also fail to gain weight and grow at the expected rate (failure to thrive) and have breathing problems.
[ghr.nlm.nih.gov]
Dingyu Tan, Jun Xu, Yi Yang, Ming Gu and Xuezhong Yu, Postoperative acute respiratory failure caused by adult‐onset Pompe disease, The Clinical Respiratory Journal, 12, 1,
[dx.doi.org]
It is characterized by a failure to thrive, cardiorespiratory difficulties and weakness with hypotonia, and leads to death within the first two years of life.
[repub.eur.nl]