[Irregular hepatic steatosis. Clinical and imaging study of 6 cases]. / Stéatose hépatique irrégulière. Etude clinique et iconographique de 6 cas.

Irregular fatty infiltration of the liver is an entity that may be confused with liver metastasis. Since ultrasonography and computed tomography of the liver are frequently performed, it seems to be a relatively commonly encountered lesion. The features of this syndrome are described herein in six patients in whom a liver biopsy confirmed diagnosis. Clinical and biological findings were non-specific. In 3 cases ultrasound examination of the liver showed increased echogenic areas. In 3 cases of large lesions, the remaining normal liver was seen as areas of decreased echogenicity and the fatty infiltration was considered falsely normal. The scanographic features of this entity were much more typical than those seen on ultrasonography. With CT, irregular fatty liver usually has a distinctive appearance characterized by a non-spherical shape, absence of mass effect and a density close to water (3 cases). When the fatty lesions are focal (3 cases) and less characteristic on CT, liver biopsy should be performed to confirm the diagnosis. Repeated CT examinations can demonstrate partial or total resolution of the lesions when conditions known to be associated with fatty liver have been treated.

[Portal pneumatosis in adults. Apropos of a case and review of the literature]. / Pneumatose portale de l'adulte. A propos d'un cas et revue de la littérature.

One case of hepatic portal venous gas is reported and here in the results of ultrasound and CT Scan imaging and the relevant literature are reviewed. These examinations are of great interest in the diagnostic and in the etiology of this disease.

[1,5 Tesla MRI in focal nodular hyperplasia. Review of the literature apropos of 7 cases]. / L'IRM 1,5 Tesla dans l'hyperplasie nodulaire focale. Revue de la littérature à propos de 7 cas.

Six patients with 7 focal nodular hyperplasia lesions were investigated with 1.5 Tesla magnetic resonance imagery (MRI). Surgical specimens were obtained in all cases and histological examination confirmed the diagnosis of focal nodular hyperplasia. In all cases, the tumour was isointense on the T1 weighted sequences. On the T2 weighted sequences in six cases, the tumour gave a hypersignal compared with the surrounding healthy liver tissue. Central scar tissue was found in all the lesions. On the T2 weighted images, the center gave a hypersignal 4 times and a hyposignal 3 times. Gadolinium injection on the echo gradient sequences (GRASS) showed product uptake suggestive of vessels within the central scar in one case. The report in the literature confirm the variability of focal nodular hyperplasia depending on the magnetic field used. In 1.5 Tesla MRI an isointense signal on at least one sequence would appear to be sufficient for the diagnosis of focal nodular dysplasia if the tumour is homogeneous and if the central scar is hyperintense in T2 sequences.

[Lymphoma of nasal and sinus cavities]. / Lymphomes des cavités aériques de la face.

Seven cases of non-Hodgkin lymphoma of the nasal cavities and paranasal sinuses are reported. All but one were primary lesions. Five of the 7 cases involved only the facial structures. Sites of involvement were the maxillary sinus (4 cases), the nasal fossae (2 cases), and one case in which lesions of both the ethmoid and sphenoid sinuses were associated with intracranial extension. CT studies showed sinus opacification and invasion of adjacent structures, but bone destruction was inconstant. Follow-up studies during treatment revealed rapid tumor regression with non specific images of mucosal hypertrophy.

[Lymphoid hyperplasia of the small intestine associated with primary hypogammaglobulinaemia in the adult. One case (author's transl)]. / Hyperplasie lymphoïde du grêle associée à une hypogammaglobulinémie primitive de l'adulte.

The authors present a clear radiological syndrome of lymphoid hyperplasia of the small intestine associated with hypogammaglobulinaemia in the adult, this association having first been described in 1966. This hyperplasia does not alter the course of the disease and, although not invariably present, should be familiar to radiologists as being indicative of, amongst other diagnoses, of primary hypogammaglobulinaemia of the adult.

[Lymphographic pictures in angio-immunoblastic lymphadenopathy (author's transl)]. / Aspects lymphographiques de la lymphadénopathie angio-immunoblastique.

Angio-immunoblastic lymphadenopathy, which has been recently individualized, is seen clinically as a stade III or IV haematosarcoma. Its etiopathogeny is mysterious and histological diagnosis is often difficult. Lymphography can assist diagnosis for, in an appreciable number of cases, the pictures which appear in association make it possible to distinguish between haematosarcomas occurring in Hodgkin's disease and others.

[Double contrast radiological study of the small intestine with duodeno-jejunal intubation. The technique used at the Nice University Hospital Centr with a report of first results (author's transl)]. / L'étude radiologique en double contraste de l'intestin grêle sous intubation duodéno-jéjunale. Notre technique au C.H.U. de Nice et premiers résultats

The authors have carried out 80 radiological studies by duodeno-jejunal intubation using a tube which they themselves perfected. The technique is simple and easily reveals organic lesions. Barium studies of the small intestine via duodeno-jejunal intubation further makes it possible to assess its tone and peristalsis. The authors feel this technique to be the most suitable for this technique purpose.

[Parasitic calcifications: elements for diagnostic (author's transl)]. / Diagnostic des calcifications parasitaires (à l'exclusion des calcifications fongiques et des protozoaires)

Among the radiologic calcifications, those of parasitic etiology are rather commonly found. They are heterotopic dystrophic calcifications, their late apparition in the evolution of the parasitic disease is not subordinate to any metabolic dysfunction. The authors describe the morphologic and the topographic criteria of different parasitic calcifications except the fungic ones and protozoaire. Moreover they state for each parasite some epidemiological, biological and clinical facts which can be helpful for the diagnosis.

Chest wall invasion by bronchogenic carcinoma: evaluation with MR imaging.

The value of magnetic resonance (MR) imaging and the roles of various pulse sequences and contrast medium enhancement in detection of chest wall invasion were evaluated in 34 patients with primary bronchogenic carcinoma. Results were correlated with clinical data and computed tomographic studies. MR imaging criteria of parietal invasion included signal intensity identical to that of the tumor on T1-weighted images, intraparietal hyperintense signal of the tumor on T2-weighted images, and intraparietal enhancement with T1-weighted imaging and gadoterate meglumine administration. Twenty patients had parietal involvement, and MR imaging was positive in 18 of the 20 (sensitivity, 90%). Two false-positive errors occurred among the 14 patients without parietal involvement (specificity, 86%). T2-weighted sequences had a sensitivity of 65% (11 of 17 cases). Contrast-enhanced and non-contrast-enhanced T1-weighted sequences had the same sensitivity, but contrast medium uptake was revealed in two patients without parietal involvement. Good spatial resolution appears to be the main factor for detection of parietal invasion.

Microcystic adenoma of the pancreas: report on four cases and review of the literature.

Four cases of microcystic adenoma of the pancreas, including ultrasonographic (US) and computed tomographic (CT) data, are described. These tumors generally present as large, well-delimited pancreatic masses whose multicystic nature is readily evidenced on postcontrast CT scans. While the presence of cysts less than 2 cm in diameter and a central, star-like calcification are very specific, the frequency of atypical forms generally justifies exploratory surgery.

Traumatic fistula between the aorta and the left renal vein: case report and review of the literature.

This report of an aorto-left renal vein fistula (ALRVF) of traumatic origin is the sixth such case on record. The fistula was successfully repaired, with preservation of the kidney, by autotransfusion. Review of the English language literature revealed the differences between spontaneous and traumatic ALRVF. Spontaneous fistulas were caused by rupture of an abdominal aortic aneurysm into a retroaortic left renal vein. Hematuria was almost constant (93% of cases). The operative mortality rate was 14%. By contrast, traumatic ALRVFs were the result of a penetrating wound to the abdomen. The left renal vein was in a normal position, anterior to the aorta. Hematuria was less common (16% of cases). The diagnosis was delayed because clinical signs were less acute. There were no reports of postoperative deaths.