Conglomerate nodules in X-ray are seen in
Sarcoidosis
Hypersensitive Pneumonitis
Silicosis
Lobar pneumonia
In silicosis long term less intense exposure, small rounded opacities in the upper lobes may appear in chest radiograph after 15-20years exposure. The nodular fibrosis may be progressive and coalesce and form nonsegmental conglomerate masses which are irregular and >1cm in diameter and can lead to progressive massive fibrosis.Reference: Harrison&;s Principles of Internal Medicine; 19th edition; Chapter 311; Occupational and Environmental Lung Disease
Respiratory system