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Biomedical subjects

J M Bigot

Publications and source records attributed to J M Bigot.

At least 19 recordsLinked to original sources
PubMed1979

[Arteriography in polyarteritis nodosa. Diagnostic findings and value of repeated examinations (author's transl)].

The results of 18 abdominal arteriographies (general aortography, selective renal, superior mesenteric, and coeliac arteries) in 11 patients with polyarteritis nodosa (P.A.S.), are reported and analyzed. In all tissues, the frequency of the lesions was 66% for micro-anéurisms, 100% for stenoses, and 83% for thromboses. These are seen mainly in the kidney, but isolated lesions may occur in the liver and gastro-intestinal tract. As they vary with time and the area affected, selective contrast studies of the main stems of the abdominal aorta and, in some cases, repeated arteriographic examinations, are necessary.

Adolescent↗
PubMed1979

[Unilateral dysplasia of the circle of Willis with multiple distal stenoses (author's transl)].

Neurological and clinical examinations were found to be normal in a woman aged 40 years who had had a single generalized epileptic seizure. Rediological examinations demonstrated a spiral-shaped calcification above and laterally to the left sella turcica. This corresponded to changes in the C 1 segment of the left carotid sinus, which was partly stenosed distally, with left unilateral abnormalities of the circle of Willis and multiple distal stenoses of the left sylvian and vertebro-basilar arteries. Scanning demonstrated that these had been present for a long time, but it is not possible to establish the diagnosis on an etiological basis as no similar radiological findings have been published.

Adult↗
PubMed1979

[Duplication of the digestive tract in adults. 5 cases (author's transl)].

Five cases of duplication of the digestive tract are reported: oesophagus, stomach, duodenum, and colon. These patients were adults, in whom it is rare (5% of cases) to find such duplications. Two types of image are seen on barium meal examination: opacification of a lumen which may be abnormally blind and which can be easily diagnosed if it is short, but is sometimes more difficult to individualize if the duplication is long (colon); or an extrinsic type of compression which is a part of the wall and much more difficult to diagnose. Knowledge of these different types of radiological images in adults should avoid precipitous investigations and orientate possible surgical interventions.

Adolescent↗
PubMed1979

[The collateral circulations of the spermatic veins (author's transl)].

The frequency and appearance of anastomoses between the spermatic veins and the inferior vena cava and portal vein, are analyzed in a series of 171 patients examined by retrograde spermatic phlebography. Spermatocaval anastomoses are divided into those that occur above the scrotum: direct (spermatocaval and iliospermatic) and indirect (perivertebral and ureteric); and those seen at the level of the scrotum (with the scrotal veins, veins of the vas deferens, and those from the contralateral scrotal area). Spermatoportal anastomoses are frequent but difficult to confirm because of the existence of proximal valves. Three cases are also reported which give examples where the spermatic vein played an important part in the collateral circulation (inferior vena cava thrombosis, left renal vein thrombosis, portal hypertension).

Collateral Circulation↗
PubMed1978

[Angiographic abnormalities after punch-biopsy of the liver (author's transl)].

The authors report on 10 cases of complications during punch-biopsy of the liver, an arterio-portal fistula being the one most frequently encountered (8 out of 10 cases). The clinical condition improved in 9 cases out of 10. The authors stress the frequency of arterioportal fistula after punch-biopsy of the liver (60% it arteriography is carried out during the first week). They recall the benign character of these fistulae and their tendency towards spontaneous healing.

Adult↗
PubMed1978

[Abnormal partial pulmonary venous return of the left lung in an adult (author's transl)].

The authors report a case of left-sided abnormal partial pulmonary venous return. This abnormality was discovered following weight loss with a strongly positive tuberculin skin test. A plain chest X-ray showed an externally convex opacity filling the aortico-pulmonary space, suggestive of a lymphadenopathy in that area. Pulmonary angiography and selective opacification of the different afferent branches of this abnormal vein defined the territory of drainage of this A.P.V.R.

Adult↗
PubMed1977

[Arteriographic appearances seen in the course of development of the lesions of polyarteritis nodosa (author's transl)].

Three cases of polyarteritis nodosa (P.A.N.) studied by abdominal arteriography with a follow-up examination between the 6th and 9th month are reported. In the first case, the initial arteriogram showed only the appearances of endarteritis. The second arteriogram, 9 months later, following a worsening of general condition, revealed diffuse aneurysms in the abdomen. In the second patient, who had multiple aneurysms at the time of the initial examination, arteriography agter 6 months following a new episode of the disease with an acute abdominal syndrome and collapse revealed, alongside the multiplication of the aneurysms with rupture of one of them, the disappearance of some ectasias with the obliteration of certain arteries. In the third patient, the follow-up arteriogram after treatment showed disappearance of the renal arteriograms which the first study had revealed 7 months before. These three cases give an idea of the different radiological appearances of P.A.N. The appearance of endarteritis with no specific characteristics indicates and inflammatory localisation of the disease. This is an initial stage leading to ectasia. Aneurysms may progress to rupture or may multiply. Endarteritis and ectasia may also progress towards scarring and disappear. A method of early diagnosis, arteriography makes it possible to institute treatment before the lesions reach a stage at which they must inevitably develop either into aneurysms or lead to obstruction with distal ischaemia.

Adolescent↗
PubMed1975

[Pathological, clinical and radiological study of colonic lympho-reticulosarcoma. Report of 8 cases (author's transl)].

The authors report 8 cases of lympho-reticulosarcoma of the colon and emphasize the rareness of this tumour (10 percent of cases) compared with other localisations in the stomach and small intestine. Whether primary or secondary, lymphosarcoma of the colon has various radiological appearances, depending on the mode of development of the sarcoma in the wall of the colon. Mainly sub-mucosal, it may remain localised or extend to the whole of the colon, predominating in the ileo-coecal and recto-sigmoid regions. Localised tumour forms present either in the form of large polycyclic lacunae, sometimes invaginated or as vast ulcerations with irregular nodular margin, or as due to parietal infiltration and exoluminal development of the tumour mass and neighbouring adenopathy. It is sometimes confused with carcinoma of the colon, e.g. vegetating carcinoma, colloid carcinoma, or peritoneal metastases, or with a regional abscess, e.g. appendix abscess or diverticulosis. The correct diagnosis is made on operation. The extensive colonic forms rarely take on the appearance of lymphoid pseudopolyposis, more often that of a very unusual nodular form formed of hazy lenticular lacunae. It may be confused with nodular colitis, it differs from this, however, by the absence of ulceration, changes in caliber and the persistance of normal haustration, a reticulated appearance of the mucosal outline during evacuation of the barium. In all cases, the discovery of a colonic lympho-reticulosarcoma implies complete digestive radiological investigation in order to seek gastric, duodenal or intestinal localisations, together with a search for other extra-digestive localisations. In fact, the great diffusion of the lesions modifies the prognosis and the therapeutic attitude. These lymphosarcomas and reticulosarcomas of the colon have a similar pathological and radiological appearance but differ by their sensitivity to treatment with cobalt, as reticulosarcomas are more resistant.

Adult↗