Diagnosi di sarcoma sinoviale del ginocchio fortuitamente favorita da evento traumatico. Il contributo dell’ecografia in urgenza al sospetto clinico e la diagnosi differenziale con l’ematoma in fase di cicatrizzazione


COD: 02_2009_151-158 Categorie: ,

Antonella Russo, Antonio Zaottini

Ann. Ital. Chir., 2009; 80: 151-157

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Synovial sarcoma accounts for 8-10% of all of the soft tissue sarcomas; it’s characterized by high risk of local relapse,
even after surgical complete excision, deceiving onset ed slowly growth. Generally arising in the contest of joint or from
immediately surrounding anatomical sites, first of all affecting inferior limbs (2/3), a sarcoma of the knee, elective anatomical
site, is described, accidentally diagnosed after traumatic event. Exhibiting a very poor 5 year survey, (55%), related
to dimension, distal or proximal arising, necrosis rate and grading, it’s the most frequently soft tissue malignancy misdiagnosed
with benign neoplasms, such as Baker cyst or villonodular pigmented synovitis, considering its deceiving macroscopic
and chronological features; the differential diagnosis seems to be very hard, relying on histhological biopsy. Though
the normal conventional x-ray finding, clinical examination and anamnesis have suggested in our patient the ultrasonographic
investigation in urgency, which revealed the suspected nature of the lesion, which must be distinguished by
hematoma, much more frequent thraumatic pathology, inducing severe prognosis in false negative cases.