Nuttapol RittayamaiNisa MuangmanRuchira Ruangchira-uraiMahidol University2018-11-092018-11-092014-01-01Respirology Case Reports. Vol.2, No.1 (2014), 4-6205133802-s2.0-85002397012https://repository.li.mahidol.ac.th/handle/20.500.14594/34454© 2013 The Authors. Pulmonary alveolar microlithiasis is a rare pulmonary disorder that is caused by abnormal sodium-dependent phosphate co-transporter from the mutation of SLC34A2 gene, leading to accumulation of microliths in the alveoli.We report the extensive pulmonary alveolar microlithiasis in an elderly woman who presented with progressive dyspnea for 2 months. Chest radiograph revealed diffuse pulmonary calcification. Tissue histopathology from open lung biopsy demonstrated widespread intra-alveolar laminated calcium deposits compatible with pulmonary alveolar microlithiasis.Mahidol UniversityMedicineArticleSCOPUS10.1002/rcr2.30