Sonographic evaluation of vascular injuries.

OBJECTIVE: The purpose of this presentation is to highlight the color Doppler duplex sonographic features of procedure-related and blunt or penetrating trauma-related vascular injuries. METHODS: Different kinds of vascular complications such as pseudoaneurysms, arteriovenous fistulas, dissection, and thrombosis are discussed. Cases of vascular injuries in the extremities, neck, and abdomen are presented to illustrate the spectrum of sonographic appearances. RESULTS: Color Doppler duplex sonography is valuable in the diagnosis and monitoring of most vessel injuries and in the treatment of pseudoaneurysms. It is useful for flow analysis and for follow-up after treatment. However, because of limitations inherent to sonography, such as bones, air, casts, skin burns, and relatively slow performance of the test, magnetic resonance imaging, computed tomography, and angiography are necessary for further evaluation in selected cases. CONCLUSIONS: Color Doppler duplex sonography is a widely available, noninvasive, and accurate technique for evaluating vascular injuries and should be the first-line imaging modality in most patients.     

Sonographic spectrum of hemorrhagic ovarian cysts.

OBJECTIVE: To present the spectrum of sonographic findings associated with hemorrhagic ovarian cysts. METHODS: Experience with making specific and correct diagnosis of hemorrhagic cysts with the use of sonography was reviewed, and the spectrum of sonographic findings was identified. RESULTS: Endovaginal sonography facilitated excellent visualization of internal architectural details of an adnexal mass, which enabled specific diagnosis of hemorrhagic cysts instead of other adnexal masses. CONCLUSIONS: A hemorrhagic cyst is a common and important entity to recognize and diagnose correctly, and because it can be confused with more ominous conditions, it is important to recognize its specific diagnostic patterns.     

Sonographic detection of free pelvic peritoneal fluid.

Transvaginal ultrasonography was performed on 113 women prior to laparoscopic sterilization. The amount and character of the peritoneal fluid present in the pelvis was assessed at the end of the operative procedure. Sonographically, free pelvic peritoneal fluid was seen in 42.5% of the patients. Laparoscopically, the average amount of fluid present was 11.2 ml with an average of 16.5 ml present in patients with FPPF and 7.2 ml present in patients without FPPF (P < 0.0001). Sonographic measurement of fluid volume was found to significantly underestimate the amount of fluid present at laparoscopy (P < 0.0001). Endometriosis and pelvic adhesions significantly changed the sonographic findings.     

Sonographic features of female pelvic tuberculous peritonitis.

OBJECTIVE: The purpose of this study was to evaluate the sonographic features of tuberculous peritonitis in an attempt to facilitate the recognition of this disorder preoperatively. METHODS: The sonographic findings of 16 patients who had tuberculous peritonitis were reviewed. RESULTS: The sonographic findings showed that 14 of the 16 patients had ascites; 10 of these had fine, complete and incomplete mobile septations. Of these 10 patients, 4 had ascites with a latticelike appearance, and 2 had ascites with a parallel violin string appearance, which to our knowledge has not been described previously; 3 had particulate ascites. Peritoneal and omental thickening or nodules were identified in 9 patients. Two patients showed bilateral complex adnexal masses with multiloculated fluid with a thick wall-like tubo-ovarian abscess. CONCLUSIONS: Tuberculous peritonitis seems to have characteristic sonographic features, especially the findings of peritoneal and omental thickening and ascites with fine, mobile septations. These sonographic findings may provide valuable information to help with further investigations and may prevent unnecessary laparotomies.     

Sonographic features of head and neck hemangiomas and vascular malformations: review of 23 patients

The sonographic features of 23 head and neck hemangiomas and vascular malformations are presented. A focal mass lesion was seen in all patients. The predominant sonographic features were a well-defined hypoechoic mass lesion with heterogeneous echotexture and the presence of cystic and sinusoidal spaces within, as well as the occasional presence of phleboliths. Color Doppler imaging demonstrated flow in 12 of 13 lesions. When performing sonography on soft tissue masses in the head and neck, the presence of color Doppler signal in a well-defined hypoechoic mass with heterogeneous echotexture should raise the possibility of an hemangioma.     

Sonographic diagnosis of pelvic adhesions in patients after ovum pickup.

OBJECTIVE: To evaluate the use of transvaginal sonography for the detection of pelvic adhesions by using clear free fluid in the pouch of Douglas found after ovum pickup. METHODS: A prospective clinical study was performed in an infertility unit of an academic research facility. Sonography was performed in 50 women with infertility 3 days after ovum pickup, and the visceral peritoneum of the uterus, the ovaries, and the fallopian tubes was scanned for possible pelvic adhesions. RESULTS: The serosal surfaces of the uterus, ovaries, and fallopian tubes were successfully observed for the presence of adhesions in 86%, 68%, and 20% of the patients, respectively. Improved visualization was associated with an increased amount of pelvic fluid for the uterus (P = .01) but not for the ovaries and fallopian tubes. The amount of fluid in the pelvis correlated with an increased number of retrieved oocytes (P = .07) and a decreased need for manual manipulation to achieve proper imaging of the uterus (P = .001). CONCLUSION: Transvaginal sonography performed in the presence of fluid in the pelvis may show adhesions mainly attached to the uterus and ovaries. Assessment of possible mechanical factors is important in planning treatment of patients with infertility.     

Sonographic spectrum of hydatid disease

Hydatid disease, caused by Echinococcus granulosus, is a parasitic disease that is endemic in many parts of the world. Hydatid cyst demonstrates a variety of imaging features, varying according to growth stage, associated complications, and affected tissue. The radiologic findings range from purely cystic lesions to a completely solid appearance. Ultrasound is the most important imaging modality for liver hydatid disease and clearly demonstrates the floating membranes, daughter cysts, and hydatid sand characteristically seen in purely cystic lesions. The radiologist's familiarity with the imaging findings of the disease is very important for earlier diagnosis and an appropriate treatment. There are several classification schemes for liver hydatid cysts based on their ultrasound appearances; the initial classification by Gharbi et al and the World Health Organization classification are the most commonly preferred. Computed tomography and magnetic resonance imaging play a key role in recognizing the complications such as rupture and infection of cysts associated with hydatid disease. Today, percutaneous treatment of liver hydatid cysts, a safe, easily applicable, and well-tolerated method, has become the most effective and reliable treatment procedure in most cases if the hydatid cyst is viable. In patients treated with the percutaneous treatment technique, a decrease in the dimensions of the cyst, solidification of the cyst contents, and irregularity in the walls of cysts are signs suggestive of cure. The radiologist should also be familiar with the postoperative follow-up ultrasound findings of hydatid cyst to prevent misinterpretation of the hypoechoic, anechoic, or hyperechoic appearance of posttreatment hydatid disease appearance as recurrence.     

Sonographic recognition of major malformations and aberrant fetal growth in trisomic fetuses.

Structural malformations and growth retardation are commonly observed in chromosomally abnormal newborns. This study assesses the sensitivity of ultrasound for detecting aberrant fetal growth patterns and chromosome-related major malformations. The study population consisted of 74 trisomic fetuses (trisomy 13, 9; trisomy 18, 22; trisomy 21, 43). Overall, 63% (38 of 60) of trisomic fetuses had at least one major malformation on postnatal examination. One or more major anomalies were identified by prenatal sonography in 68% (26 of 38) of these malformed fetuses and 43% (26 of 60) of the entire trisomic population. Midtrimester onset growth retardation was evident in 43% of fetuses with trisomy 13 and 59% of fetuses with trisomy 18. These findings suggest that a systematic fetal anatomic survey can be a powerful screening tool for the prenatal detection of chromosome abnormalities.     

Intracranial vascular malformations

Intracranial vascular malformations are nonneoplastic developmental anomalies that present a variety of clinical patterns, ranging from asymptomatic to fatal intracranial hemorrhage. A practicing radiologist can expect to encounter these abnormalities, which include capillary telangiectasias, venous angiomas (also called developmental venous anomalies), cavernous angiomas, and arteriovenous malformations. The imaging findings that characterize these lesions are reviewed in this article, along with their pathological and clinical features.     

Sonographic spectrum of fetal cardiac hypoplasia

Four cases of hypoplastic left ventricle and three cases of hypoplastic right ventricle detected sonographically prenatally are presented. A four-chamber view of the heart was abnormal in all seven cases. The sonographic appearance of the hypoplastic ventricle was variable, being smaller than normal in six of seven cases and not being identified at all in one case. Other ultrasound findings included an atrial septal defect (n = 7); increased size of the contralateral ventricle (n = 6); nonvisualization or poor visualization of the outflow tract of the affected ventricle (n = 6), and intact ventricular septum (n = 5). In one of four cases of hypoplastic left ventricle the pregnancy was terminated; the other three infants died within 5 days after birth. One of the three fetuses with hypoplastic right ventricle was aborted. Of the remaining two infants included one had tricuspid atresia with a ventricular septal defect and one had pulmonary atresia with an intact ventricular septum. Both infants are alive, have had palliative surgery, and will be considered for a more definitive surgical repair. An abnormal four-chamber view of the heart should alert those performing routine obstetrical ultrasound to a possible hypoplastic ventricle, so that the pregnant woman can be referred to a center capable of performing more sophisticated fetal echocardiography.     

Sonographic features of ovarian cystadenofibromas: spectrum of findings.

OBJECTIVE: To describe the sonographic characteristics of ovarian cystadenofibromas. METHODS: We conducted a retrospective study of 23 ovarian tumors histopathologically confirmed as ovarian cystadenofibromas that were preoperatively evaluated by transvaginal color Doppler sonography. RESULTS: In all cases the mass was predominantly cystic. Septations appeared in 30.4% of the tumors. Papillary projections or solid nodules appeared in 56.5% of the cases. The most frequent appearance was a unilocular complex cystic mass. In 47.8% of the tumors, vascularization was detected, having a typical pattern of peripheral vascularization with scattered vessels of high blood flow impedance. CONCLUSIONS: We have described the sonographic spectrum of findings of ovarian cystadenofibromas. The most frequent appearance was a unilocular cystic mass with gross papillary projections or solid nodules. In almost half of the tumors, vascularization could be detected.     

Sonographic contrast agents in vascular imaging

The use of ultrasound contrast agents for peripheral vascular imaging has not been adapted widely worldwide and remains experimental in the United States. Nevertheless, there is considerable interest in contrast agents, because they potentially might offer substantial benefits for peripheral vascular imaging. This article reviews the status of ultrasound contrast agents. It includes a thorough discussion of the types of agents that are available or are under development and an assessment of the desirable properties of an ideal contrast agent. The interaction of these agents with ultrasound is considered next, including consideration of the advantages of harmonic imaging with contrast. Finally, the potential clinical benefits of contrast, as revealed by the authors experience and published data, are reviewed for a variety of cerebral, peripheral, and abdominal vascular applications. These include the carotid arteries, transcranial Doppler, extremity arteries and veins, the renal arteries, and hepatic vessels.     

Embolization of vascular malformations

Often vascular malformations (VMs) can only be treated by multiple modalities. Alongside surgical interventions and laser therapy, embolization and sclerotherapy of such lesions have become mainstays of clinical management and sometimes represent the sole option for treating acute and life-threatening hemorrhages. In a total of 315 sessions, we embolized 133 patients with VMs of non-cerebral origin. Primary focus was placed on arteriovenous malformations (AVM). The outcome was classified as successful only when we were able to embolize the shunt level. For this purpose, liquid embolizing and sclerosing agents were applied alone or in combination with particle suspensions. Recurrence rates, especially for maxillofacial malformations, were dependent on disease spread, pretreatment status and patient age, and proved high overall. In practical terms, it was not possible to completely or permanently eliminate AVMs which had been long-standing or had received pretreatment by unsuitable methods. Embolization represents an indispensable part of every overall therapeutic concept for VM management. Acute hemorrhages are manageable in nearly all cases; in selected disease processes, a cure can be accomplished by embolization alone.     

Sonographic spectrum of scrotal abnormalities in infertile men

PURPOSE: To use sonography to detect scrotal abnormalities in infertile men. MATERIAL AND METHODS: Two hundred thirty-four infertile men, including 176 oligospermic (sperm count < 10 x 10(6)/ml), 58 azoospermic, and 150 normospermic men (control group) were evaluated prospectively for the presence of intra- and extratesticular abnormalities using high-frequency transducers and color Doppler imaging. Medical and surgical history, testicular volume, semen parameters, and hormonal levels were recorded. RESULTS: A statistically significant increase in the prevalence of abnormal scrotal findings detected with sonography was observed in the study group compared with controls. These included varicocele in 35.5% versus 16% (p < 0.01), hydrocele in 16.7% versus 8.7% (p < 0.05), testicular microlithiasis in 9.8% versus 2% (p < 0.01), epididymal enlargement in 9% versus 2.6% (p < 0.05), and epididymal cyst in 7.7% versus 2% (p < 0.05). Testicular tumor was not seen in either group. A statistically significant decrease in testicular volume, sperm concentration, normal morphology, and forward motility of the sperm was noted in the study group compared with controls (p < 0.01). CONCLUSION: The various intra- and extratesticular abnormalities were demonstrated in infertile men. Sonography should be used routinely in the work-up of male infertility.