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F Eftekhari

Publications and source records attributed to F Eftekhari.

At least 19 recordsLinked to original sources
PubMed2001

Case report: Calcifying fibrous pseudotumour of the adrenal gland.

Calcifying fibrous pseudotumour is a distinct pathological entity usually occurring in the soft tissue of the extremities, trunk, axilla, pleura, mediastinum and peritoneum. This report describes the hitherto unreported occurrence of this tumour of the adrenal gland in a 10-year-old girl whose imaging findings closely resembled a neuroblastoma. This entity is a potential pitfall in diagnosing adrenal neuroblastoma.

Adrenal Gland Neoplasms↗
PubMed2000

Childhood cancers: hepatoblastoma.

Hepatoblastoma is the most common primary liver tumor in children, accounting for just over 1% of pediatric cancers. The etiology is unknown, but it has been associated with Beckwith-Weidemann syndrome, familial adenomatosis polypi, and low birth weight. The primary treatment is surgical resection, however, chemotherapy plays an important role by increasing the number of tumors that are resectable. The prognosis for patients with resectable tumors is fairly good, however, the outcome for those with nonresectable or recurrent disease is poor.

Child↗
PubMed1999

Hepatocellular carcinoma and intrahepatic peripheral cholangiocarcinoma: enhancement patterns with quadruple phase helical CT--a comparative study.

PURPOSE: To define the hemodynamic features of hepatocellular carcinoma (HCC) and intrahepatic cholangiocarcinoma by using quadruple phase helical computed tomography (CT) and determine the value of this information in characterizing tumors. MATERIALS AND METHODS: Helical CT of the liver was performed in 45 patients with newly diagnosed HCC or peripheral cholangiocarcinoma. Scans were obtained before and 25 seconds, 70 seconds, and 2-6 minutes after the start of the contrast material injection. The intensity and spatial distribution of contrast material uptake were evaluated during all phases. Time-attenuation curves were established for each lesion. Relative attenuation and lesion conspicuity were assessed. A diagnostic confidence level was assigned to each lesion. RESULTS: In the majority of HCC lesions, a single, early peak of enhancement followed by a continuous decrease in tumor attenuation over time was seen. The greatest tumor conspicuity occurred during the delayed phase. In cholangiocarcinoma, tumor attenuation increased during the delayed phase. In the majority of lesions, the greatest tumor conspicuity was seen during the portal venous phase. In both tumor types, the diagnostic confidence level improved when the delayed phase was used. CONCLUSION: The variation over time in the intensity of contrast enhancement in HCC and cholangiocarcinoma differs sufficiently to make this a useful diagnostic criterion. The delayed phase is particularly important because it amplifies this difference.

Adult↗
PubMed1998

Thymic sarcoma in childhood.

Sarcoma of the thymus is exceedingly rare, especially in children. We report a case of thymic sarcoma in a child, including the imaging findings which have not been previously described.

Child↗
PubMed1996

Osteosarcoma metastatic to the pancreas in young patients.

Two rare cases of pancreatic metastases from osteosarcoma are reported. Metastatic spread occurred after treatment with chemotherapy. This unusual phenomenon represents an alternation in the natural history of osteosarcoma with increased long-term survival of patients who are successfully treated with chemotherapy.

Adolescent↗
PubMed1996

Merkel cell carcinoma of the skin: imaging and clinical features in 93 cases.

Clinical, pathological and imaging data for 93 patients with Merkel cell carcinoma were reviewed. Median survival duration from the date of diagnosis was estimated using the Kaplan-Meier product-limit method. Survival durations of patients with no metastastic disease, with regional lymph node metastasis only and with distant metastases were compared using the Cox-Mantel log-rank test. The median age for patients with Merkel cell carcinoma was 70 years (range 35-91 years). The tumour occurred in 71 men and 22 women. The most common primary site was the head and neck region (64 patients), followed by the extremities (21 patients) and the trunk (10 patients). Median survival duration for the whole group was 33 months (range 2-140 months). Imaging studies of the primary sites were available for 10 patients and of metastatic sites for seven patients. Sonograms of the primary skin lesions showed single or multicentric hypoechoic nodules arising from the dermis and growing into the subcutaneous tissues. CT scans showed single or multiple minimally enhancing soft tissue nodules, in two instances associated with lytic bone erosion. The metastatic lesions were moderately hypoechoic on sonography and target-shaped with or without ring-enhancement on CT. Imaging studies have a limited role in diagnosis of the clinically evident primary skin lesions, but may be helpful in the assessment of the depth of the invasion and are crucial in the evaluation of regional and distant metastatic disease. If regional adenopathy is found then CT of the chest, abdomen and pelvis may be in order.

Adult↗
PubMed1996

Imaging of superficial soft-tissue infections: sonographic findings in cases of cellulitis and abscess.

The variation in the sonographic appearances of superficial soft-tissue infections probably reflects a continuous process that leads from soft-tissue edema, seen in cellulitis, to a fully developed abscess and that depends on the type of infection or the immune status of the host. We describe the sonographic findings seen in this process and the variable appearance of abscesses, with emphasis on scanning techniques that facilitate the diagnosis of liquefaction.

Abscess↗
PubMed1993

Mesenchymal hamartoma of the chest wall in infants and children: a clinicopathological study of five patients.

Mesenchymal hamartoma of chest-wall is a rare benign lesion that has varied histological characteristics and usually occurs during early infancy. We report the histological characteristics of mesenchymal hamartoma found in five patients aged respectively 25 days, 5 months, 8 months, and 4 and 8 years at presentation. Two patients presented with respiratory distress, two with an asymptomatic chest-wall mass, and one with a deformity of the left chest wall. Surgical resection was performed on four patients and a biopsy only in one patient. Overall, the tumors were well delineated, lobulated, tan to reddish in color, and on section showed blood-filled cystic spaces with interspersed small islands of cartilage and fibrous tissue. Histological analyses demonstrated mixtures of bone trabeculae with spindle-cell stroma, chondroblast-like proliferation, mature and immature hyaline cartilage, and aneurysmal bone cyst formation. All patients are alive and well without evidence of disease. Despite the alarming clinical and histologic presentation, mesenchymal hamartoma of the chest wall is a non-neoplastic benign lesion.

Child↗
PubMed1993

Cystic retroperitoneal lymphangioma: CT, ultrasound and MR findings.

A case of cystic retroperitoneal lymphangioma complicated by hemorrhage is reported in a 7-year-old boy who presented with an abdominal mass. The mass which was partially obstructing the ureter was successfully resected. The imaging findings with emphasis on MR features are described.

Child↗
PubMed1993

Sonography of the scrotum after orchiectomy: normal and abnormal findings.

Sonography is the primary imaging technique for evaluating the scrotal contents. In this pictorial essay, we illustrate a range of normal and abnormal sonographic findings in patients after orchiectomy, including the appearances of the normal postorchiectomy space, acute and subacute hematomas, recurrent neoplasm, second primary tumor in the remaining testis, and testicular prostheses.

Adult↗
PubMed1992

Sonographic findings in Richter's hernia.

Richter's hernia can present as a diagnostic challenge because of its usually small size and eccentric bowel wall involvement with limited luminal compromise. This article describes a case of Richter's hernia in the femoral canal and illustrates its sonographic features.

Aged↗
PubMed1990

Malignant rhabdoid tumor of the kidney: imaging features in two cases.

Two new cases of malignant rhabdoid tumor of the kidney (RTK) in childhood are reported. Both presented with large abdominal masses and developed hypertension and one became hypercalcemic during the course of the disease. In each case disseminated disease and death occurred within three months of diagnosis. The findings on imaging consisted of large renal masses with a central site of origin, distant metastases at the time of presentation, and a subcapsular fluid collection in one of the two patients. The clinical and imaging features of RTK may suggest this diagnosis when faced with a primary renal neoplasm in childhood.

Biopsy, Needle↗
PubMed1989

Inflammatory metachronous hyperostosis of the clavicle and femur in children. Report of two cases, one with long-term follow-up.

Two preteenage girls developed painful swelling of the left clavicle. This was followed by painful swelling of the femur, 7 months later in one girl and 8 years later in the other. Radiographic studies showed a predominantly sclerotic process in one patient and destruction associated with cortical thickening in the other. The patients received analgesic medications only, followed by gradual healing with cortical and medullary sclerosis. Long-term follow-up suggests that the condition is self-limited and that, with or without treatment, the bones eventually return to normal. Although the etiology of the lesions remains unknown, the radiographic features suggest an inflammatory reaction.

Biopsy↗
PubMed1989

Osteosarcoma metastatic to the kidney.

Two clinically silent renal metastatic lesions from primary osteogenic sarcoma were first detected on radionuclide bone scan. A needle biopsy performed under the guidance of abdominal ultrasonography confirmed the diagnosis. Prior to nephrectomy, further definition of the metastatic lesion was attained using enhanced computed tomography. A review of the English literature revealed only six previous cases of metastatic osteosarcoma detected in the kidney prior to autopsy.

Adolescent↗
PubMed1989

The many faces of neuroblastoma.

Neuroblastoma is a common tumor in childhood. It arises in the adrenal gland or in various extraadrenal primary sites of the sympathetic chain. Clinically, it may present as an abdominal mass or as disseminated metastatic disease. We studied 52 patients with neuroblastoma, and the typical and unusual radiographic features of the disease are presented.

Adrenal Gland Neoplasms↗
PubMed1989

Thyroid gland: US in patients with Hodgkin disease treated with radiation therapy in childhood.

The authors retrospectively assessed with sonography the prevalence of thyroid gland abnormalities in 30 patients who underwent radiation therapy for Hodgkin disease between 1962 and 1984. Doses ranged from 3,000 to 4,500 rad (3,000-4,500 cGy). Abnormalities were found in the sonograms of 24 patients and included unilateral (n = 6) or bilateral (n = 2) atrophy; multiple hypoechoic lesions smaller than 0.75 cm (n = 18); and dominant cystic (n = 2), solid (n = 3), or complex lesions (n = 4) larger than 0.75 cm. The risk of development of an abnormality increased as the time from irradiation increased and was comparable between patients who did and did not receive chemotherapy as part of the treatment regimen. Although the pathologic correlates of the various abnormalities seen on sonograms may differ, the findings indicate a need for long-term follow-up of patients who underwent cervical irradiation for Hodgkin disease.

Adolescent↗