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Pseudotumoral lesions

par Salgado, Rodrigo;Alexiou, Jean ;Engelholm, Jean Luc
Référence Imaging of Soft Tissue Tumors, Springer Berlin Heidelberg, page (415-446)
Publication Publié, 2006

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Résumé :

Tumor-like soft tissue lesions are a common clinical problem. Their etiology is very broad ranging from pure anatomic variants over post-traumatic events, to metabolic conditions and many other origins.A common feature of many of these lesions is the fact that they are mostly reactive in nature. Several of these conditions are self-limiting, or do not require significant intervention. Although it is possible to estimate the incidence of true soft tissue tumors, it is more difficult to estimate the incidence of pseudotumors, and this for several reasons. First, many patients often do not seek medical advice for benign lesions (e.g. hematoma) or for normal anatomic variants (e.g. accessory soleus muscle).Moreover, many radiologists are not familiar with the spectrum of non-tumoral masses, as such adding to the confusion between these pseudotumoral processes and a truetumoral process.As a consequence, in a significant number of instances these pseudotumoral masses require a biopsy for a definite diagnosis. In this chapter, we will discuss infectious and inflammatory pseudotumoral lesions, hemorrhage (hematomas) and gout, as well as normal variants and vascular lesions which may simulate tumoral disease. Other pseudotumoral pathology such as nodular fasciitis and elastofibroma, ganglion and synovial cysts, pigmented villonodular synovitis and arteriovenous malformations will be discussed in specific chapters.