Biomedical subjects
Publications and source records attributed to A Belloir.
Results of CT scan and ultrasound exploration were discordant in a patient with the pseudotumoral form of hepatic tuberculosis. Although rare, this localization should not be unrecognized because of the curable nature of the affection. Tissular characterization of lesion was not possible by medical imaging alone and liver puncture-biopsy examination was necessary.
A case is reported of calcifying metastases of colon origin localized to psoas muscle. Emphasis is placed on the effectiveness of CT scan and MR imaging and the rarity of this localization. The presence of intra-lesional calcifications as described in hepatic metastases raises the question of the etiopathogenic mechanism and the predictive value of the detection of a calcified mass during the course of colon adenocarcinoma.
A case is reported of pseudotumoral retroperitoneal tuberculosis with invasion of left supraclavicular glands. Relative diagnostic efficacy of ultrasound and CT scan imaging is discussed as well as the differential diagnosis of this exceptional lesion. Exploratory procedures suggested with this type of picture are ultrasonography. CT scanning and possibly guided needle puncture biopsy to avoid surgical exploration. The value of the scanner for follow up review of results of antituberculosis treatment is emphasized.
The authors report the detection of a cystadenocarcinoma of the caudal pancreas developed by muscular metastasis. They insist on the rarity of that type of localization to distinguish from the lesions of steatonecrosis. In the check-up of the developing metastasis, this observation bears out the interest of the C.T. of first meaning which allows an approach of lesional characterization owing to the analogies of structure existing between the causal pancreatic lesion and its muscular and hepatic metastasis.
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280 patients presenting osteophilic tumors were evaluated by conventional tomography of the cervical spine. Metastasis were found in 120 cases among which 70% had no symptoms. Axis was first concerned and sometimes lesions could not be detected on plain radiographs. Authors insist on the need of a systematic cervical spine tomographic study in patients with osteophilic tumors.
A sonographic diagnosis was obtained in 33 hematomas encountered in conditions of emergency. Most hematomas were related to anticoagulant therapy. Most hematomas were located within the psoas muscle sheath, hematomas of the abdominal wall and Retzius'cavum. Follow-up examination of non operated hematomas show a progressive decrease of echogenicity.
The correlation of sonography with CT was studied in a series of 19 hepatic angiomas. CT is more specific, since it can demonstrate the vascular nature of the lesion. But it is less sensitive: in three cases it remained negative even after bolus injection of contrast medium. A follow-up strategy, and a decision policy regarding the different examination procedures is discussed.
Accessory spleens can contribute to diagnostic difficulties when evaluating a left upper quadrant mass. Sonography often displays a parenchymal bridge between the accessory element and the organ itself. When such a pattern is absent, contrast enhanced CT is instrumental to permit one a correct diagnosis since it confirms isodensity.
The peritoneal and visceral limits of the lesser omental sac have been studied by ultrasound in ten patients with gross ascites. Ascitic fluid provides necessary contrast and ultrasound examination gives valuable anatomic information. A few pathologic examples are also studied.
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Seven cases of calcification in the roof of the nasopharynx are reported. These calcifications situated in the midline opposite the pharyngeal bursa, were associated in four patients with a neural or osseous defect of the craniocervical junction. The authors estimate the frequency of this asymptomatic calcification to be about 0.1%. This finding is thought to be a calcified remnant of the notochord.
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Efficacious management of migratory collections of pancreatic origin requires precise topographic diagnosis. Such collections can be multiple, atypical and ubiquitous, extending from the mediastinum down to the pelvis, within peritoneal recesses and retroperitoneal spaces, and even within viscera such as the liver, spleen or kidney. Sonography and CT are complementary in the diagnosis and management of such collections.
A total of 24 patients with liver metastases of the calcifying type were detected during CT scan imaging for cancer of different primary origin (colorectal, ovarian, mammary, gastric, prostatic, melanoma). These calcifying metastases represented 27% of the 89 liver metastases cases detected, and the incidence of a colorectal origin for these calcifying lesions (20% of cases) appears to be highly significant, their number being relatively larger than reported in previous studies. Identification of liver calcifications of possible diagnostic importance requires a two-stage CT scan investigation, before and after bolus. Paraclinical examinations should be directed selectively towards the digestive tract when the primary tumor is unknown.