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Fig. 3 | Diagnostic Pathology

Fig. 3

From: Chondromesenchymal hamartomas in a 24-year-old male mimicking a posterior mediastinal tumor and a 5-month-old boy with postoperative disseminated intravascular coagulation: two case reports

Fig. 3

Pathological characteristics of the chondromesenchymal hamartoma (HE staining) in case 1. a, b Hyaline cartilage with endochondral calcification. c, d Hyaline cartilage with endochondral ossification and calcification surrounds the ABC-like area. In the lower left region, the fibrous wall is composed of connective tissue stroma with scattered osteoid trabeculae and osteoclast-like giant cells. e, f A number of mesenchymal spindle-shaped cells interwoven with multilobulated hyaline cartilage. g, h Typical secondary ABC structures appearing as cystic spaces containing red blood cells. The fibrous walls are composed of connective tissue stroma with scattered osteoid trabeculae and osteoclast-like giant cells. Ossification frequently appears within the fibrous walls and among the cartilage background. i, j Disorganized mixture of mesenchymal spindle cells, multinucleated osteoclastic giant cells, endochondral ossification, and hemorrhagic spaces with fibrous cystic walls. Left panel, × 10; right panel, × 20. HE, hematoxylin and eosin; ABC, aneurysmal bone cyst

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Diagnostic Pathology

ISSN: 1746-1596

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