OBJECTIVE: To describe the radiographic appearance of acute @entity548 in @entity2694 and how spiral computed tomography (CT) can aid in the diagnosis of these lesions in @entity1 with atypical presentations. DESIGN: Case series from the Eye Plastics and Orbital Service of Massachusetts Eye and Ear Infirmary. @entity1 /INTERVENTION/MAIN OUTCOME MEASURES: Three @entity1 who initially presented with signs and symptoms of @entity548 are presented. Their initial clinical and radiologic imaging, follow-up examination, and results of the spiral CT are summarized. RESULTS: The initial CT in each case showed a well-localized homogeneous mass in the posterior/inferior orbit. In the two cases without antecedent @entity130 , it was difficult to distinguish these localized @entity548 from possible intraorbital @entity5 . On resolution of the @entity548 , these three @entity1 had different presentations. The first @entity1 had @entity5768 that was documented by increase in exophthalmometry measurement before and after Valsalva maneuver (symptomatic and with clinical signs). The second @entity1 had a subjective orbital pressure sensation, but no visible change by examination (symptomatic but without clinical signs). The third @entity1 was not symptomatic and had no significant clinical findings (asymptomatic and without clinical signs). Spiral CT showed the presence of an enlarging inferior orbital mass during Valsalva maneuver, which was not apparent pre-Valsalva in all these @entity1 . CONCLUSIONS: Localized @entity548 easily may be mistaken for solid intraorbital masses: therefore, accurate determination can avoid unnecessary surgical intervention. @entity1 with @entity2694 may or may not have symptoms and clinical signs of @entity5768 . After the resolution of the initial @entity548 , spiral CT during Valsalva maneuver using a single breath hold technique is useful in showing the presence of this @entity1211 when suspicious of this entity, even in @entity1 who are asymptomatic.

Orbital XXXX demonstrated by spiral computed tomography.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients', 'patient', 'PARTICIPANTS'] @entity548 :: ('MESH:D006470', 'Disease') :: ['orbital hemorrhage', 'hemorrhage', 'hemorrhages'] @entity5 :: ('MESH:D009369', 'Disease') :: ['neoplasm'] @entity5768 :: ('MESH:D005094', 'Disease') :: ['intermittent proptosis'] @entity2694 :: ('MESH:D009916', 'Disease') :: ['orbital venous malformation', 'orbital venous malformations'] @entity1211 :: ('MESH:D054556', 'Disease') :: ['venous anomaly'] @entity130 :: ('MESH:D014947', 'Disease') :: ['trauma']
@entity1211 :: (MESH:D054556,Disease) :: ['venous anomalies']
