Anguillulosis: circumstances of infestation and evolution towards the malignant form.

Introduction: Anguillulosis is a ubiquitous digestive parasitosis. Rare in Tunisia, it is due to a round worm, strongyloid stercoralis, whose natural lodging is the duodeno-jejunal mucosa. Its malignant form is rare but it represents a potentially life-threatening disease.

Neuroblastoma-like schwannoma with giant rosette: A potential diagnostic pitfall for hyalinizing spindle cell tumor.

Neuroblastoma-like schwannoma (NLS) is a rare variant of a common tumor. The aim of this study is to discuss, through a literature review, the differential diagnoses of NLS while emphasizing the importance of ancillary studies. So far, 24 cases have been reported.

Intranodal Palisaded Myofibroblastoma in a Submandibular Lymph Node.

Intranodal palisaded myofibroblastoma (IPM), also known as "intranodal hemorrhagic spindle cell tumor with amianthoid fibers," is a rare benign mesenchymal tumor originating from smooth muscle cells and myofibroblasts, often with the presence of amianthoid fibers. Usually IPM affects inguinal lymph nodes, but three cases have been described in the submandibular and cervical lymph nodes. We report a new case of a 44-year-old women with submandibular mass.

[An unusual lesion of the nasopharynx: oncocytic metaplasia].

Oncocytic metaplasia of the nasopharynx is an exceptional lesion which exact etiopathogenesis, although largely discussed, still remains controversial. The purpose of this paper is to present the epidemiological characteristics and clinical signs of this lesion and to study its pathogenesis and its therapeutic modalities. We report two cases that occurred respectively in a 53- and 60-year-old woman.

[Tumors of salivary glands: anatomical study and clinical epidemiology of a series of 180 cases].

Background: The salivary gland tumors are rare (less than 3% of all tumors) and poorly known. In fact, they are numerous and histologically difficult to diagnose.

Aim: This work aims to point at the different histological types of salivary gland tumors, to draw out the principal epidemiological, clinical, radiological and histological characteristics, and to compare our cases to those of the literature.

[Naso-sinusienne sarcoidosis].

Background: Sarcoidosis is an ubiquity disease, which can infiltrate all tissues. The cutaneous and ophthalmologic thoracic localizations are most frequent. The nasosinusienne localisation is rare.

[Sneddon-Wilkinson's subcorneal dermatosis: an atypical case pustular].

Background: Sneddon-Wilkinson disease (SW) is chronic and benign disease belonging to the heterogeneous spectrum of neutrophilic diseases. It is characterised by flask, superficial, aseptic pustules, mainly involving the trunk, axilla and inguinal folds, favourably responsive to sulfones.

Aim: We report an original case with an atypical clinical presentation and course.

[Plexiform fibrohistiocytic tumor: a low grade malignancy lesion].

The plexiform fibrohistiocytic tumor is rare. It affects mainly children and adolescent. This tumor occurs at the dermo-subcutaneous region of the upper extremities.

[Prospective study of 420 biopsies realised in patients with duodenal ulcer with positive Helicobacter pylori].

It's a prospective study leaded between September 1997 and july 1999 (23 months ) in 75 patients with duodenal ulcer and positif for Helicobacter pylori. All patients had a first endoscopy with antral, fundic and duodenal biopsies, followed one month later by a second control fibroscopy with biopsies of the same sites. A total of 420 biopsies was realised.

[Filiation hamartoma polyposis dysplasia and small bowel adenocarcinoma].

Peutz-Jeghers syndrome is a hereditary affection with dominant autosomal transmission. The risk of cancerisation is largely higher than that in the general population. Dysplasia is rare.

[Gastrointestinal stromal tumors. A study of 5 cases].

GI stromal tumors are mesenchymatal tumors arising primarily from the digestive tract or from the omentum. Despite their rarity (less than 1% of digestive tumors). These tumors have become of current interest since the discovery of a treatment for metastatic and locally advanced tumors, the imatinib (Glivec).

[Angiomatoid fibrous histiocytoma: rare tumor of intermediate malignancy].

Angiomatoid fibrous histiocytoma is a rare tumour affecting young adults. Unlike conventional malignant fibrous histiocytoma, its extension is only local thus giving a good prognosis. We report the cases of a 9 year-old girl and a 16 year-old boy presenting respectively, with an axillary tumour 5 cm of diameter and a paravertebral subcutaneous tumour 1.

[Multicentric extrahepatic bile ducts carcinoma. Clinical presentation, pathologic features and management].

Extrahepatic bile ducts carcinoma (EHBC) arises usually in the upper third of the biliary tract. They are rarely multicentric associated or not to a gallbladder carcinoma. We report the case of a 53 years man operated for a head pancreas.

[Gastric and colonic sarcoidosis. A case report].

Sarcoidosis is a disseminated disease defined by the presence of non-caseous granulomas. Digestive localizations are rare and the stomach is the mostly affected. The diagnosis is frequently difficult.

[The effect of cryopreservation on the structural and functional properties of human vascular allografts].

Objectives: To assess the effet of cryopreservation on the structural and functional properties of venous and arterial human allografts.

Materials And Methods: Segments of arteries and veins harvested from multiorgan donors were divided into 3 groups: fresh-control tested for 24 hours after harvesting, frozen directly at -80 degrees C and frozen gradually (progressive freezing technique) and preserved in liquid nitrogen at -196 degrees C degree. The 2 cryopreserved groups of segments were allowed in two different cryoprotectant solutions (M1 and M2) containing both dimethyl sulphoxide (10%), RPMI 1640 for the first and M 199 for the second.