The best-known example is a tumour for which the most relevant question is the assessment of the malignant nature of the lesion and the type of malignancy.
Complex features (e.g. bubble-like lucencies) are highly indicative of a malignant nature.
Spiculation, pleural retraction and notch sign are highly suggestive of a malignant nature.
Features that suggest a malignant nature include a persistent subsolid morphology, spiculation, lobulation, and pleural retraction.
Temporal change in the tumor size suggested the malignant nature of the tumor, although it was considered a benign schwannoma by these radiologic findings.
Despite their malignant nature, they may show fairly well-defined or lobulated margins and can be confused with the intermediate-grade lesions radiologically.
Diffusion restriction on the b1000 image (c) with a low apparent diffusion coefficient (ADC) value (d) is also evident, consistent with its malignant nature.
The tumour is fairly well defined despite its malignant nature because of a pseudocapsule, but may exert a mass effect or encase neurovascular bundles.
In our case, we thought that sonopsy is necessary to diagnose a retroperitoneal tumor because temporal change in the tumor size suggested the malignant nature of the tumor.
Regardless of the benign or malignant nature of a cardiac mass, an excision of the lesion is important to avoid the potential risk of embolization [3,5,8-10,18] and to determine the accurate diagnosis and therapy [18,19].
Histopathologic examination proved the malignant nature, showing an adenocarcinoma Open image in new window Fig. 21 Chest CT in 62-year-old man with pancytopenia was performed to rule out infection.
