Pathological diagnosis and immunohistochemical analysis of minute pulmonary meningothelial-like nodules: A case report

Figure 1 Computed tomography examination before surgery. A: A ground-glass nodule with rough edges (about 2.5 mm × 9 mm in size) in the apicoposterior segment of left upper lobe; B: A ground-glass nodule with clear edges (about 6 mm × 4 mm in size) in the lateral basal segment of left lower lobe; C: Ground-glass density shadows were seen in the apex of right lungs, with blurred edges, and the range was approximately 9 mm × 6 mm.

Figure 2 High-resolution computed tomography 21 mo after surgery. A: A pure ground-glass nodule in the apical segment of the right upper lobe (about 13.2 mm × 5.6 mm in size); B: A mixed ground glass in the superior segment of the right lower lobe Nodules (about 4.3 mm × 2.9 mm in size); C: A pure ground-glass nodule in the lateral basal segment of the left lower lobe (about 7.2 mm × 5.3 mm in size).

Figure 3 Histomorphological manifestation of right lower lobe nodule was the small foci in the alveolar septum were distributed in mild form of the aggregation of short spindle cells. A: Original magnification 200×; B: Original magnification 400×.

Figure 4 The Immunohistochemistry showed that the lesion was positive for epithelial membrane antigen and somatostatin receptor 2a. A: The lesion was positive for epithelial membrane antigen, original magnification 200×; B: The lesion was positive for epithelial membrane antigen, original magnification 400×; C: The lesion was positive for somatostatin receptor 2a, original magnification 200×; D: The lesion was positive for somatostatin receptor 2a, original magnification 400×.