Fig. 4
From: Multisystem ALK-positive histiocytosis: a multi-case study and literature review
Radiological and pathological features of case 4. A The brain MRI showed a large mass (5.1 × 3.6 cm in size) in the third ventricle. B The lesion was diffusely distributed. C The histiocytes were epithelioid with abundant cytoplasm, accompanied by some lymphocytes. D Many foamy cells could be seen. E The histiocytes were positive for CD68. F The histiocytes were positive for ALK1. (Original magnification × 40 [B]; × 200 [C, E, F]; × 400 [D])