Pathology: anastomosing haemangioma

Capillary-sized vascular channels with anastomosing sinusoidal pattern

Eosinophilic cytoplasm with occasional hyaline globules

Round-ovoid nuclei with occasional "hobnailing" and mild atypia; inconspicuous mitotic activity

Occasional fibrin thrombi

IHC: CD31

Capillary-sized vascular channels

Eosinophilic cytoplasm with rare hyaline globules

Round-ovoid nuclei with occasional "hobnailing" and mild pleomorphism; inconspicuous mitotic activity

Occasional fibrin thrombi; extramedullary haematopoiesis

Capillary-sized vascular channels

Eosinophilic cytoplasm, with occasional hyaline globules

Round-ovoid nuclei with occasional "hobnailing" and mild pleomorphism; inconspicuous mitotic activity

Fibrin thrombi; extramedullary haematopoiesis