Langerhans cell histiocytosis involving only the thymus in an adult: A case report

Figure 1 Imaging and macroscopic examination of the anterior mediastinum occupancy. A and B: Plain computed tomography (CT) of pulmonary window (A) and mediastinal window (B) showed anterior mediastinal mass; C and D: The enhanced CT of pulmonary window (C) and mediastinal window (D) showed no significant enhancement of the anterior mediastinal mass.

Figure 2 Histopathological analysis and immunohistochemical examination of the resected specimen. A: Hematoxylin and eosin staining (200 ×); B-G: Immunohistochemical staining for (B) S100 (200 ×), (C) CD1a (200 ×), (D) CD163 (200 ×), (E) cyclin D1 (200 ×), (F) CD21 (200 ×) and (G) Ki-67 (200 ×).

Figure 3 18F-fluorodeoxyglucose positron emission tomography showed positive uptake of the mass, suggesting no systemic metastasis.

Figure 4 Computed tomography of the chest at 3 mo after surgery. A: Plain Computed tomography (CT) of pulmonary window showed good postoperative healing; B: Plain CT of mediastinal window.