Unusual appearance of a cisternal hydatid cyst

We herein describe a case of an isolated multilocular hydatid cyst occurring in the basilar cisterns, with nondependent levels of different signal intensities shown on MR images. Three portions were visualized on T1-weighted images: the hyperintense inferior aspect, the isointense central part, and the superior aspect of lower signal intensity. The inferior portion was hypointense on T2-weighted images. This unusual appearance was caused by layering of hydatid sand and may represent a characteristic feature of hydatid disease.     

Ultrasound diagnosis of liver hydatid disease

A clinical study of 42 patients with hydatid disease was carried out using a real-time gray scale B-scanner. All cases were confirmed surgically. The ultrasound characteristics of the hydatid cysts were classified into three groups: Type I, simple hydatid cyst (19 of the 42 cases), type II, hydatid cyst with a disrupted wall and septa (14 cases), and type III, hydatid cyst with a heterogeneous echo pattern (9 cases). It was concluded that ultrasound classification of the cysts increases diagnostic accuracy. However, if a hydatid cyst becomes secondarily infected these typical changes are lost and the ultrasound diagnosis may then become more difficult. Periodic examinations should be performed with ultrasound after surgery.     

Ultrasound demonstration of an infected urachal cyst

A 5-year-old child presented with a recurrent infraumbilical abdominal mass. Clinical and sonographic diagnosis was consistent with an infected urachal cyst. The clinical features and sonographic differential diagnosis are discussed.     

Ultrasound demonstration of an infected urachal cyst

A 5-year-old child presented with a recurrent infraumbilical abdominal mass. Clinical and sonographic diagnosis was consistent with an infected urachal cyst. The clinical features and sonographic differential diagnosis are discussed.     

Pulmonary arterial embolism secondary to hydatid cyst of the liver.

Complications may develop after spontaneous or traumatic rupture of hydatid cysts. A rare complication is pulmonary embolism after rupture of such a cyst into the venous system. The authors present the pulmonary radiologic findings for a patient whose pulmonary complaints gradually increased after surgical removal of a hepatic hydatid cyst.     

A rare phenotype of breast hydatid cyst causing misdiagnosis and unnecessary intervention: a case report

Hydatid cyst (cystic echinococcosis) is a chronic parasitic infection by the larval stage of the cestode that is called Echinococcus granulosus (E. granulosus) resulting in the development of cystic lesions in animals and humans. In this report, we describe a rare phenotype of hydatid cyst in the breast of a 23-year-old female presented with breast mass in the left upper outer quadrant for 3 months with palpable left axillary lymph nodes. Both US and mammography provided a picture of complex suspicious cystosolid lesion with amorphous micro-calcification (BIRAD-4A). Surgical consultation was performed and Tru-Cut biopsy was recommended. Histopathology results revealed multiple viable protoscolices of E. granulosus and suggested the final diagnosis of breast hydatid cyst. The patient returned with ruptured and infected hydatid cyst of the breast and started treatment with Albendazole 400 mg twice daily in addition to antibiotics. Following-up after two months of Albendazole treatment showed a dramatic shrinkage in the size of the cystic lesion. In conclusion, hydatid cyst should be considered as a differential diagnosis of any cystic or cystosolid lesion in the breast and any organ in the body from head to toe apart from the hair and nails. Radiologists should be aware to the benign lesions that may mimic breast cancer to avoid misdiagnosis and unnecessary invasive procedures and consequent complications.     

The radiological appearances of the liver after surgical removal of hydatid cyst

Simple excision of a hydatid cyst from the liver leaves a residual cavity. Depending upon the surgical management of the cavity this can appear cystic, hypoechoic or echogenic on subsequent ultrasound examination. Negative attenuation values on computed tomography are typical of omentoplasty. These appearances can mimic pathological lesions in the liver. Knowledge of the site and nature of previous surgery can prevent diagnostic confusion.     

Late ultrasonographic findings in cases operated for hydatid cyst of the liver

PURPOSE: The aim of this study was to evaluate and present the images due to surgical intervention and to recurrences in patients who had been operated for hydatid cyst of the liver at least 12 months prior to the imaging process. MATERIAL AND METHODS: A total of 77 patients (46 females, 31 males) with a mean age of 38 years (10-60 years) who had undergone surgical intervention for hydatid cyst of the liver were included in this study. The type and the number of operations were determined by reviewing previous medical records of the patients. Recurrence findings and postoperative images were examined by ultrasonography in all patients. RESULTS: Of the 77 patients, 68 had undergone surgical operation for hydatid cyst of the liver for once, six cases for twice, one patient for three and another patient for four times. Ultrasonographic examination was considered normal in 9 (11.6%) patients. The most frequent finding in the remaining patients was hypoechoic (n=6) and anechoic (n=14) images with a hyperechoic periphery within the operation area. While a coarse heterogenous area was visualized in 12 cases (15.5%), a sole hypoechoic image was present in 10 patients. Recurrence was detected in 9 (11.6%) patients of whom 7 were asymptomatic. While daughter cysts were detected in two recurrent cases; the remaining were unilocular cysts. An omentum image extending to the operation area was detected in 11 patients. Calcification was present in 14 patients, whereas four cases had less common findings of anechoic tubular structures adjacent to the operation area. CONCLUSION: While the liver may seem normal by ultrasonography in the late postoperative period in patients, who had been operated for hydatid cyst of the liver, various images may also be present. These images may be misinterpreted as recurrence or other pathologies. Thus, the radiologist should be familiar with the postoperative ultrasonographic findings of hydatid cyst and should not misinterpret the image of anechoic fluid as recurrence. When in doubt, ultrasonographic follow-up is essential. An early postoperative ultrasonographic examination may be the key point in precluding a misdiagnosis.     

Isolated retroperitoneal hydatid cyst. CT study. Apropos of a case

A 30 year old patient with isolated retroperitoneal hydatid cyst was the first case of this type to be studied by CT scanning. Isolated retroperitoneal hydatid cyst is defined as any zone of hydatidosis occurring in the fatty tissue of the spaces lying behind posterior parietal peritoneum, without any parasitic foci in other organs. Differential diagnosis from other primary retroperitoneal cysts has been improved by the availability of modern imaging procedures: ultrasonography and CT scan.     

Renal hydatid cyst. Contribution of radiology apropos of a case

Hydatid disease, an infestation of gastrointestinal origin, is essentially localized in the two principal filters of the body, the liver and the lung (80% of localizations); 20% correspond to a random distribution (brain, bones, kidneys, etc.). The observation of a new case of rare renal infestation (1 to 5% of all hydatid cysts) constitutes an occasion to review the role of various radiological investigations in this disease. Computed tomography has a role in the diagnosis which is complementary to that of plan abdominal x-rays and ultrasonography. Intravenous pyelography may be performed subsequently. It has an essential role in the systematic investigation of other localizations.     

Embryonal rhabdomyosarcoma within a choledochal cyst.

The authors describe a 6-year-old girl in whom they found an embryonal rhabdomyosarcoma in a choledochal cyst; they found no previous reports of such an association. The patient presented with recurrent jaundice and loss of weight and appetite. A large abdominal mass was palpable. Ultrasonography and computed tomography revealed a large subhepatic mass, which contained multiple septations and mural masses delineating cystic areas. The common hepatic duct opened directly into the mass, and the intrahepatic radicles were dilated. Intraoperative cholangiography revealed that the cysts in the mass were continuous with the hepatic and intrahepatic radicles. The mass was completely excised, and a Roux-en-Y hepaticojejunostomy was performed. Postoperative adjunct chemotherapy and radiotherapy were instituted.