42. Haemangiosarcoma is a malignant tumour with a pronounced infiltrative character. Mention histological elements that facilitate the diagnosis of this type of tumoura) abundance of collagen fibers and fibrocytes arranged in stripsb) digitiform or branched epithelial projections to the vascular lumenc) carcinomatous pattern and presence of blood cellsd) vascular pattern and the presence of red cells in the lumens of the spaces delimited by malignant endothelium cellse) numerous mitosis and the constant presence of tumour cells with striations in the cytoplasm

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