Radiographic findings consist of a reticular or reticulonodular pattern and, eventually, honeycombing, involving mainly the lower lung zones.
[ncbi.nlm.nih.gov]
Pulmonary reticulonodular patterns of infiltration and calcified nodules may be observed in chest radiographs of NPD patients with or without pulmonary symptoms.
[symptoma.com]
[…] inexorable, due to the accumulation of Niemann–Pick cells in the alveolar septa, bronchial walls, and pleura, potentially leading to a progressively worsening restrictive pattern
[link.springer.com]