PubMed Health⌕ Search

Biomedical subjects

C Hoeffel

Publications and source records attributed to C Hoeffel.

At least 37 records · Page 2Linked to original sources
PubMed1998

[Value of high-frequency (20 MHz)in the diagnosis of cutaneous tumors].

The purpose of the present study is to asses the value of high frequency ultrasonography (20 MHz), a new noninvasive imaging technique, in cutaneous tumors. Cutaneous tumors are clinically varied and their diagnosis is still based on histopathological analysis. 140 cutaneous tumors have been examined with US and imaging findings have been compared to the results of clinical and histological examinations. This study shows that high frequency ultrasonography, even though it cannot replace pathological analysis, may help the dermatologist in the positive diagnosis of some cutaneous tumors and in accessing the location and the in depth-extension of the lesions in the different layers of the skin.

Adolescent↗
PubMed1998

[Imaging of adrenal incidentalomas].

Imaging plays an important role in evaluating fortuitously discovered adrenal masses. These unanticipated masses (incidentalomas) are usually discovered at CT examinations. Although most incidentally discovered adrenal tumors are non-hyperfunctioning adenomas, they must be distinguished from primary or secondary malignant lesions. Recent studies have established that both unenhanced CT scans and chemical shift MR imaging can accurately differentiate benign adenomas from nonadenomatous masses by features that reflect the large amount of lipid found in most adenomas and absent in most nonadenomas. We review here the current imaging issues concerning adrenal incidentalomas including diagnostic approaches and management.

Adenoma↗
PubMed1997

MRI and MRA for diagnosis and follow-up of cerebral venous thrombosis (CVT).

OBJECTIVE: To assess the sensitivity of magnetic resonance imaging (MRI) and magnetic resonance angiography (MRA) in the diagnosis and the follow-up of cerebral venous thrombosis (CVT). To describe MRI and MRA features in CVT. MATERIAL AND METHODS: The clinical and neuroradiological studies of 20 patients with proven CVT were reviewed. All patients underwent computed tomography (CT), MRI (with MRA for 15 patients) and digital substraction angiography (DSA). Eleven patients had follow-up after treatment with MRI (nine with MRA). RESULTS: MRI and MRA together provided the diagnosis of CVT in all cases. The sensitivity of MRI alone was 90%. MRA showed abnormalities in all cases of CVT. Progressive sinus recanalization was demonstrated by follow-up with MRI and MRA at least 15 days after diagnosis and treatment. CONCLUSION: In most of cases, the combination of MRI and MRA is sufficient to allow diagnosis of CVT and obviates the need for invasive angiography. MR studies are also useful for the follow-up of CVT.

Adolescent↗
PubMed1997

Technetium-99m sestamibi scintigraphy, magnetic resonance imaging and venous blood sampling in persistent and recurrent hyperparathyroidism.

Surgical treatment for primary hyperparathyroidism (HPT) is effective in 90% of cases. Recurrent or persistent HPT occurs in 10% of cases. Parathyroid imaging is indicated to confirm and locate an abnormal gland before reoperation. The aim of this study was to evaluate whether the combination of 99Tcm sestamibi scintigraphy, MRI and venous blood sampling (VBS) improved the overall sensitivity for abnormal parathyroid gland detection. 18 patients with recurrent or persistent HPT underwent sestamibi scintigraphy (n = 18), MRI (T1 weighted and STIR sequences) (n = 18) and venous blood sampling (n = 12) at different sites (internal jugular veins, innominate veins, and superior vena cava). All patients underwent surgical exploration. MRI yielded positive results in 15 cases (sensitivity 88%), sestamibi scintigraphy in 14 cases (83%) and VBS in 10 cases out of 12 (83%). Combined results of MRI, sestamibi and VBS yielded positive results in 16 cases (94%). The combination of MRI, sestamibi scintigraphy and VBS improved accuracy in detecting abnormal parathyroid glands before reoperation.

Adenoma↗
PubMed1997

Malignant change in an intradiploic epidermoid cyst.

We describe a unique case of an intra-diploic epidermoid cyst of the parietal and occipital right bone in a 43 year-old man. The tumor remained quiescent for 12 years and then spontaneously showed malignant changes with intra-cerebral involvement. Fatal outcome occurred one year after surgery, radiation therapy and chemotherapy because of a recurrence. Malignant transformation of the epithelium in epidermoid cyst is very rare. Our case is the first one where this transformation occurred spontaneously without previous surgery.

Adult↗