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The carcinoma of the jejunum represents 3-6.5% of gastric intestinal tumors and 33-50% of small intestine carcinomas. The observation of a case of jejunum carcinoma has offered the authors the idea for a critical revision on the subject. After an examination on the diagnostic, anatomopathological, clinical and therapeutic problems, the authors underline the importance of the precocious diagnosis of neoplasia; in fact the jejunum carcinoma is characterized by a hidden and aspecific symptomatology and by dangerous evolution; besides the site is difficult for an organic study with the common methods of investigation. Therefore, in all patients in whom the suspicion of a jejunum pathology exists, it is indispensable to carry out a precise diagnostic iter which is based on radiological endoscopic and tomographic investigation: in fact the small intestine and the jejunum in particular are intestinal tracts that are explored with difficult and therefore at times only an accurate effecting of the radiological study can permit a precocious diagnosis the only valid supposition for the carrying out of a truly radical surgical therapy and for the acquiring of a batter prognosis.

A case of malignant fibrous histiocytoma occurring in the gingival tissue on the site of the mandibular right canine is reported. The histological, histochemical, immunohistochemical and ultrastructural features are discussed and compared with the recent literature on malignant fibrous histiocytomas.

By hystological and electronmicroscopical study liver of rats treated with tiadenol at a daily dose of 100 and 200 mg for 30 days, we could demonstrate: lack of necrosis and interstitial phlogosis and, especially in those animals treated with greater doses, numerical increase of peroxisomes, hypertrophy of SER and RER and a lesser regularity of glycogen distribution.

We investigated involvement of the peripheral nervous system in 6 patients with amyotrophic chorea-acanthocytosis. Electromyographic and neurographic findings, and pathological changes as demonstrated by examination of biopsy specimens of muscle and sural nerve indicate that most patients had an axonal sensorimotor polyneuropathy with more pronounced involvement of the distal portion of the nerves. Results obtained in one patient raised the question of an anterior horn cell disorder.

A case of sporadic adult-onset centronuclear myopathy is presented. EMG was myopathic and nerve conduction study entirely normal. Single-fiber electromyography showed a normal percentage of potential pairs with abnormal jitter, slightly increased mean jitter value, no blocking and normal fiber density. Somatosensory and motor evoked potentials were within the normal limits. While it is still a subject of debate whether centronuclear myopathy is neuropathic or myopathic in origin, our findings are against peripheral nerve and CNS involvement.