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Biomedical subjects

F Nucci

Publications and source records attributed to F Nucci.

At least 19 recordsLinked to original sources

290 surgical procedures for ulnar nerve entrapment at the elbow: physiopathology, clinical experience and results.

Ulnar nerve entrapment at the elbow is an important and relatively frequent pathological condition that may be related to different causes depending on individual or external factors. The cause of the nerve lesion is also idiopathic in about one-quarter to one-third of cases. This variable aetiopathogenetic presentation has often suggested different diagnostic and clinical approaches and, moreover, various surgical procedures. We present our 8-years surgical experience with 290 cases of ulnar nerve entrapment at the elbow analysing the salient clinical features and the results of the surgical treatment in the light of the relevant literature available on this topic.

Adolescent↗

Benign neural sheath tumours of major nerves: characteristics in 119 surgical cases.

Peripheral benign nerve sheath tumours are infrequent tumours and affect major nerve trunks. Some authors have indicated a high and prohibitive incidence of neurological injury in resection of these lesions. The authors describe their findings in a retrospective study comprising 119 patients with spontaneous benign nerve sheath tumours of the peripheral nervous system. Seventy-three patients had a schwannoma, 41 had neurofibroma and 5 had plexiform neurofibroma; 25 of the 119 patients suffered from neurofibromatosis. All schwannomas were excised completely and the outcome of patients was 41.0% improved, 6.8% worsened, 52.0% unchanged. Twenty-eight neurofibromas were excised completely and 13 subtotally; the outcome for patients was 19.5% improved, 19.5% worsened and 61% unchanged. All plexiform neurofibromas were removed subtotally and the outcome for patients was 20% improved and 80% unchanged. The best surgical results at average follow-up of 6 years were observed in the patients with schwannoma, the worst in those with plexiform neurofibroma. Our results demonstrated that it is often possible to remove schwannomas as well as neurofibromas with an acceptable risk of injury to the nerve.

Adult↗

Synovial cysts: clinical and neuroradiological aspects.

Lumbar and intraneural synovial cysts are uncommon lesions, although their incidence has increased since the introduction of MRI. The authors describe the results of a study comprising 23 patients with synovial cyst (5 lumbar, 19 intraneural). Neuroradiological investigations included CT scan and MRI; however, it was not always possible to diagnose the nature of the lesion. In 18 cases the lesion was removed totally including its capsule; in the other 5 cases it was removed subtotally. Seven of the 23 patients presented a total remission of symptoms/signs, 11 improved and 5 remained unchanged. The importance of treating synovial cysts as radically as possible is discussed together with their most significant clinical and neuroradiological aspects.

Adolescent↗

Functional analysis of the preproendothelin-1 gene promoter in pulmonary epithelial cells and monocytes.

At least two human preproendothelin-1 mRNAs are produced by a single gene through the use of different promoters, and the mechanisms controlling the production of these alternative transcripts might be cell-specific. In human lung, endothelin-1 is produced by vascular endothelial cells, bronchial epithelial cells, and pulmonary monocytes/macrophages. Given the important role of endothelin-1 in the pathogenesis of some pulmonary diseases, we carried out a functional analysis of the preproendothelin-1 gene promoter(s) in bronchial epithelial cells and lung monocytes. Two distinct preproendothelin-1 mRNAs were expressed in the two cell populations. Using deletion mutants and enhancer trap transfection experiments, we also identified different regions of the preproendothelin-1 gene necessary for endothelin-1 expression in bronchial epithelial cells and pulmonary monocytes.

Base Sequence↗

Birthday of peripheral nervous system surgery: the contribution of Gabriele Ferrara (1543-1627).

SURGERY OF THE peripheral nerves has only recently achieved brilliant results thanks to technological advances in the development of neurosurgical instrumentation. In past centuries, few surgeons made relevant contributions to this topic and improvement was slow and difficult. Avicenna, Guglielmo da Saliceto, and Guido Lanfranchi reported some attempts to suture nerves directly, but Gabriele Ferrara was the first to give a lucid and succinct description of suturing of the stumps of a transected nerve. He described applying gentle traction on the retracted stumps, suturing using a special needle with an eye, after immersion in a decoction of red wine, rosemary, and roses (alcoholic disinfection?), and, finally, insulating the sutured segment with a mixture of oils. We are celebrating the 400th anniversary of the first edition of his fundamental work (1596-1996), and we truly esteem this surgeon, a pioneer of peripheral nerve surgery wo primarily contributed to its progress.

History, 16th Century↗

Purely epithelioid schwannoma. Two case reports and a review of the literature.

The authors describe 2 cases of purely epithelioid schwannomas, one spinal the other peripheral. At surgery, the spinal schwannoma appeared as an orange-sized, solid, brown mass. Total removal of the tumor was performed. The peripheral schwannoma appeared as a fusiform, brown, movable mass in the sensitive branch of the left tibial nerve and was removed by a wide en bloc excision. Intraoperative nerve action potentials were performed both prior to and following excision of the lesion. Histologically, the tumors were composed of round or polygonal cells arranged in necrotic clusters and anastomosing cords. There were areas of spindle cells. The epithelioid cells were round to oval with abundant cytoplasm. Mitoses were frequent (3 out of 10 in high-power field). S100 protein immunoreactivity was present diffusely in tumor cells (both nuclear and cytoplasmic), whereas cytokeratin, NSE, and anti-melanoma reactions gave negative results. After a long follow-up, the neurological condition of the patients is excellent and there are no signs of either recurrence or metastasis. The therapeutic management of epithelioid schwannoma is discussed.

Adult↗

Bifid median nerve: report of two cases.

The median nerve divides into its terminal branches at or proximal to the distal edge of the flexor retinaculum. An anatomy of the median nerve within the carpal tunnel is reported in two separate cases. Emphasis has been given to the value of direct vision when incising the flexor retinaculum in order to avoid injure of the median nerve.

Carpal Tunnel Syndrome↗

CT findings in peripheral mononeuropathies.

Thirty-six patients with a peripheral localized nerve lesion (18 of median nerve, 7 of ulnar nerve, 2 of radial nerve, 1 of lateral cutaneous brachii nerve, 1 of sciatic nerve, 5 of peroneal nerve and 2 of tibial nerve), were evaluated by Computed Tomography (CT). We used a high resolution scanner (Siemens Somatom CR) and we performed 2mm thickness slices. Sagittal and coronal reconstructed images were obtained too. Thirty-two out of 36 patients underwent surgery. CT scan was useful in all cases in defining the relationship between nerve lesions and surrounding tissues and in planning surgical procedures. The CT evaluation of tissues densities and characteristics allowed us to define the pathologic nature of the lesions in 10 cases.

Adult↗

A report on radiation-induced gliomas.

Radiation-induced gliomas are uncommon, with only 73 cases on record to date. The disease that most frequently occasioned radiation therapy has been acute lymphoblastic leukemia (ALL). Three more cases are added here, two after irradiation for ALL and one after irradiation for tinea capitis. In a review of the relevant literature, the authors stress the possibility that the ALL-glioma and the retinoblastoma-glioma links point to syndromes in their own right that may occur without radiation therapy.

Adult↗

Tuberculoma of the ulnar nerve: case report.

A peripheral nerve tuberculoma, the third on record, involved the ulnar nerve, as did the other two. This case report is followed by a discussion of the pathogenesis and diagnosis of this lesion. Its pathogenesis is unclear. Direct infection from a tuberculous sister was disproved, and infection via a local wound is highly unlikely. A previous, silent form of tuberculosis seems to have been the cause.

Adult↗

Bilateral cervical posterior rhizotomy: effects on dystonia and athetosis, on respiration and other autonomic functions.

Bilateral cervical posterior rhizotomy of C1 through C4, C5 or C6 was performed in 16 patients affected by dystonia and athetosis resulting from infantile cerebral palsy. The majority showed decreased muscle spasms and athetoid movements, with some improvements in their posture and voluntary mobility. 5 patients suffered from uneven and irregular breathing associated with lethargy immediately postoperatively, and 4 also showed reduced diaphragmatic activity; all 4 of these patients developed pneumonia, transitory in 3, but fatal to the other. Urinary retention lasting for a maximum of 3 months occurred in 4 of the 5 patients. The authors suggest that the lesion of ascending reticular fibers in the cervical posterior roots could have been responsible for the observations.

Adolescent↗

Ganglion of deep peroneal nerve: electrophysiology and CT scan in the diagnosis.

Deep peroneal nerve mononeuropathy is rarely observed in clinical practice. We describe a case in which the syndrome was caused by a clinically not detectable ganglion within the anterior compartment of the leg. Electrophysiological data allowed us to localize the site of the lesion for a correct planning of CT scan. CT scan showed a low density tissue occupying the anterior compartment of the leg and its relationships to muscles, septa, bones and vessels. Electrophysiological data and CT scan utilities are discussed.

Adult↗