PubMed Health⌕ Search

Biomedical subjects

R Atallah

Publications and source records attributed to R Atallah.

12 recordsLinked to original sources
PubMed2000

Hard metal exposures. Part 2: Prospective exposure assessment.

Hard metal exposures may precipitate lung disease in exposed workers. This article reports on a project investigating the relationship between local exhaust hood air flow levels and workplace hard metal exposures. Airborne cobalt, chromium, and cadmium exposure concentrations, and ventilation system function were monitored for three consecutive days prior to installation of three new ventilation systems, and then were followed monthly for one year. Work activities included wet and dry grinding of saw blades, brazing, welding, and setup. Work task exposures were highly variable over the period of the study. Ventilation air flows failed to meet design goals due to low total air volume and poor distribution; however, worker exposures to metals were controlled in most cases. Hood design, worker acceptance, and use of the hoods were as important in controlling exposures as were exhaust hood air flow levels.

Air Pollution, Indoor↗
PubMed2000

[Pseudoaneurysm of the uterine artery: apropos of 1 case].

Pseudoaneurism of the uterine artery is uncommon and is usually associated with pregnancy or surgical trauma. Diagnosis is based on both Doppler sonography and arteriography. We report a case of pseudoaneurysm of the uterine artery associated with a leiomyoma without prior surgery or pregnancy. Treatment, which consisted on laparotomy, allowed avoiding rupture and confirmed diagnosis.

Adult↗
PubMed1998

[Testicular microlithiasis].

Testicular microlithiasis is an uncommon condition in which calcified concretions fill the lamina of seminiferous tubules. It has a specific appearance on sonography with diffuse intra testicular echogenic foci without acoustic shadows. Testicular microlithiasis can be associated with various entities and frequently with primary testicular neoplasm. The authors report a new case of testicular microlithiasis diagnosed by sonography in a 14-year-old boy with epididymo-orchitis. Based on a review and discussion of the literature, the authors emphasize the importance of regular and protracted ultrasound follow-up and monitoring of serum tumour markers to allow early detection of primary testicular neoplasm.

Adolescent↗
PubMed1997

[Attempted classification of scrotal contusions].

We present a review of the literature and results of a survey involving 50 closed scrotal traumas. Based on this analysis, we propose an anatomoclinical classification of scrotal contusions based on what we consider to be the most appropriate therapeutic management.

Adolescent↗
PubMed1994

[Treatment of kidney and retroperitoneal abscesses using percutaneous drainage. Apropos of 17 cases].

For a long time, the treatment of retroperitoneal abscesses was exclusively surgical. Ultrasonography and computed tomography provide new therapeutic approaches to these lesions. The authors report a series of 17 renal and retroperitoneal abscesses treated by primary percutaneous drainage. This treatment generally ensures a favourable course, avoiding the need for surgery, which is still indicated in patients with associated uropathy or after failure of percutaneous drainage.

Abscess↗
PubMed1994

[Ultrasonographic aspects of kidney pelvis tumors associated with infectious hydronephrosis of lithiasic origin].

The ultrasonographic findings of 4 patients with surgically confirmed urothelial tumors associated with calculic pyonephrosis are presented. All the involved were markedly enlarged and hydronephrotic with obstructive calculi, stigmata of pyonephrosis and, an echoic pelvic mass, extending in calyceas in 2 cases. The sonographic appearance correlated well with the gross pathological findings. The histological types were 2 squamous cell carcinomas, 1 adeno-squamous cell carcinoma and 1 transitional carcinoma. The chronic calculic irritation was proved to induce squamous and glandular metaplasia. The subsequent squamous carcinoma and adenocarcinoma were documented in the literature. The preoperative diagnosis of the associated tumor was rarely done. The sonographic features reported are highly suggestive of urothelial tumor and may lead to an accurate preoperative diagnosis.

Adenocarcinoma↗
PubMed1993

[The "blue rubber bleb nevus" (Bean's syndrome): uncommon cause of gastrointestinal bleeding].

A ten year old boy had six cutaneous angiomas and recurrent rectal bleeding responsible for iron deficiency anemia. Histological examination established the diagnosis of blue rubber bleb naevus syndrome. Endoscopy, arteriography, computed tomography, and angioscintigraphy disclosed additional angiomas in the stomach and rectum and along the blood vessels in the lower limbs. The value of angioscintigraphy for identifying angiomas escaping detection by other means was illustrated in this case. Embolization of the inferior mesenteric artery was successful in preventing further rectal bleeding. Treatment of this disorder remains controversial.

Angiography↗
PubMed1992

Cobalt exposure in a carbide tip grinding process.

Reports relating hard metal disease or nonspecific respiratory symptoms to tungsten or cobalt exposure have been published in the past 20 yr. This report discusses a work site investigation of a small company, employing approximately 50 workers, producing carbide tip saw blades for the woodworking industry. Cobalt exposure was characterized by ambient air monitoring (area and personnel), particle size determination, and biological monitoring. Area sampling for cadmium, cobalt, and tungsten indicated low ambient air levels in all manufacturing areas except the grinding department, which had cobalt air levels approaching the threshold limit value of 0.05 mg/m3. Area airborne cobalt exposure levels measured over six shifts in the grinding department ranged from 0.017 to 0.12 mg/m3 for the total collection method and 0.002 to 0.028 mg/m3 for the method collecting respirable particles. Cobalt content in the total and respirable fractions was similar. Urine monitoring indicated production workers have elevated cobalt levels, and the grinders' levels were higher than other production workers. The grinding coolant was found to have elevated cobalt concentrations. A survey of coolants from nine carbide grinding shops indicated the elevated cobalt concentrations may be common.

Air Pollutants, Occupational↗
PubMed1989

[Thrombophlebitis of the ovarian vein. Apropos of 2 cases].

Thrombophlebitis of the ovarian vein is a rare post-partum complication. Its diagnosis is said to be difficult, but was greatly facilitated by the progress made in imaging. The authors report about two cases identified with computed tomography. Evolution was favorable in both cases with an anticoagulant and antibiotic treatment.

Abdominal Pain↗
PubMed1989

[Contribution of imaging in complications of colo-anal anastomoses. Apropos of 61 cases].

The authors studied the complications occurring in 61 cases of colo-anal anastomosis carried out for cancer in 55 cases. Fistula formation occurred in 14 cases i.e. approximately 23%. This was symptomatic in 11 cases i.e. 18%. Their clinical course was favourable. One case of necrosis of the reservoir was seen. The recurrence rate for neoplasms was 14.3% and was no higher than after abdomino-perineal resection. The procedure is justified in terms of tumour recurrence.

Adult↗
PubMedDate not supplied

[Chemoembolization of malignant liver tumors].

The main aspects of hepatic chemoembolization are first described: principles, drugs and their vectors, various techniques and contra-indications. In the literature as in our own experience, most encouraging results are reported in metastases from endocrine tumors and hepatocellular carcinoma. Favourable results in the latter disease have been particularly emphasized by Japanese authors whose data are reported, as well as results in a personal series and in three controlled studies. Chemoembolization is now able to induce partial or complete responses. Nevertheless, unambiguous selection of responding patients cannot be stated yet, especially for hepatocellular carcinoma where an underlying chronic liver disease probably plays an important role in prognosis. Consequently, chemoembolization of malignant hepatic tumors must still be considered as a technique under evaluation.

Carcinoma, Hepatocellular↗