Figure legends
Figure 1A: Non contrast CT (NCCT) chest (axial view) showing a well-defined hypodense soft tissue density mass (black arrows) in the posterior mediastinum with eccentric specs of calcification, with proliferation of adjacent fat (white star). Note the presence of a large feeder vessel from DTA and left pleural effusion (blue star).
Figure 1B: NCCT chest (coronal reformatted view) shows a well defined, mass located above left hemidiaphragm. Rest of the findings are same.
Figure 1C : CECT chest (axial view) showing avidly enhancing well defined mass (green star) with central non-enhancing areas suggestive of central necrosis (black star). Also note a large feeder vessel from DTA.
Figure 2 : Cut section of the operative specimen shows well-defined tumour surrounded by fatty tissue on other end.
Figure 3A : Photomicrograph shows lymphoid follicles (F) with atrophic germinal centres and central hyalinisation (yellow arrow head). Interfollicular stroma shows vascular and fibroblastic proliferation along with numerous lymphocytes and plasma cells.
Figure 3B : Photomicrograph (Inset image) shows lymphoid follicle having concentric layering of lymphocytes in an onion-skin patternĀ (yellow arrow) encircling an atrophic germinal centre (yellow arrow head). This so called targetoid onion-skin appearance and is highly suggestive of CD.