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Biomedical subjects

S Calvieri

Publications and source records attributed to S Calvieri.

At least 73 records · Page 4Linked to original sources
PubMed1988

Trichothiodystrophy without photosensitivity. Biochemical, ultrastructural and DNA repair studies.

A case of trichothiodystrophy (TTD) without photosensitivity is reported in an 8-year-old girl. Electron microscopic (EM) examination of the keratinocytes showed fibrillary bundles in the cytoplasm thinner and less electron dense than those of the normal cells and large membrane-bound vacuoles filled with granular-filamentous material. These findings could indicate a disturbance in the protein metabolism in tissues of ectodermal origin, explaining also the functional abnormalities of the central nervous system in TTD patients. The results of cellular DNA repair studies after UV irradiation in cultured fibroblasts showed normal levels of unscheduled DNA synthesis. This finding indicates that UV hypersensitivity is not constantly present in TTD.

Amino Acids↗
PubMed1988

Mediastinal angiofollicular lymph node hyperplasia, hyaline-vascular type with mucocutaneous manifestations.

A never previously reported association between mediastinal angiofollicular lymph node hyperplasia (ALNH) of the hyaline vascular type and mucocutaneous manifestations in a twenty-one-year-old man is described. Mucocutaneous lesions, unresponsive to medical therapy, promptly disappeared after resection of the mediastinal mass, indicating, as suggested for the plasmacell type, a close relationship between the systemic manifestations and ALNH.

Adult↗
PubMed1986

Expansion of large granular lymphocytes in psoriatic erythroderma. A case report.

A psoriasis patient developed erythroderma after the withdrawal of a self-administered chronic topical glucocorticoid therapy. A marked expansion of cells with the morphological and phenotypic features of large granular lymphocytes was noticed in peripheral blood. Functional investigations revealed that these cells responded poorly to polyclonal activators and exhibited antibody-dependent cellular cytotoxicity and natural killer activity. Blood abnormalities completely subsided in about two months in the absence of any cytostatic therapy and coincided with the recovery from the erythroderma and the spreading of classical psoriatic plaque lesions. This excluded an underlying malignant process. This patient represents the first report of a previously undescribed immunological disorder in psoriatic erythroderma.

Adult↗
PubMed1986

Classification of non-Hodgkin malignant lymphomas of the skin.

The authors subdivide the primary non-Hodgkin cutaneous malignant lymphomas into "proper" and "non-proper" types. "Proper" lymphomas are those which have in the skin their proper site of localization, and include mycosis fungoides, Pagetoid reticulosis, Baccaredda-Sézary syndrome and possibly lymphomatoid papulosis. They are T-cell lymphomas arising in the papillary dermis, characterized by epidermotropism, having a specific clinical feature in that they are unlikely to be simulated by other cutaneous malignant lymphomas. "Non-proper" lymphomas are those which do not usually arise in the skin, but in various other organs. They are B-, T- or null-cell lymphomas, arising in the middle dermis, infrequently epidermotropic, having a papular-nodular-tumoural clinical feature, which are indistinguishable clinically from other neoplastic types such as plasmacytoma and Hodgkin's disease. The three classifications of non-Hodgkin lymphomas most followed are not directly applicable to cutaneous lymphomas because some of the former are not primarily sited in the skin, and because a follicular morphology is infrequently seen in the latter. Whereas the first classification reported for cutaneous lymphomas utilized malignancy as a criterion, the present classification here proposed utilizes the propriety of the site of localization as the criterion for subdivision into "proper" and "non-proper" types.

B-Lymphocytes↗
PubMed1985

Giant axonal neuropathy. Endocrinological and histological studies.

A case of giant axonal neuropathy (GAN) in a boy of 4 years and 6 months, is reported. Nerve conduction velocity (NCV), EEG and CT scan indicated both peripheral and central nervous system involvement. Intestinal absorption tests did not reveal vitamin B12 malabsorption; the endocrine situation was found to be substantially normal. The clinical picture was not modified by 18 months cyanocobalamine administration followed by 2 months therapy with prednisone. Electron microscopic (EM) examination revealed longitudinal and opposing grooves (pili canaliculi) in the hair and bundles of neuro-filaments in the myelinated and unmyelinated nerve fibre axons in sural nerve. EM of conjunctiva and skin revealed masses of intermediate-sized filaments within mast cells, fibroblasts, melanocytes, endothelial and Schwann cells. These findings confirm the hypothesis that GAN is a generalised abnormality of cytoplasmic microfilament formation, probably linked to an unknown disorder of protein metabolism.

Axons↗
PubMed1984

Hypereosinophilic syndrome and plasmocytoma. Report of a case and review of the literature.

The 4th case of plasma cell neoplasm associated with a hypereosinophilic syndrome is described and compared with the previous reports. Hypereosinophilia in the present patient displayed some borderline traits with eosinophilic leukemia. Myeloproliferative disorders of the eosinophilic line often present as a precancerous state, but sometimes they seem to acquire malignant independence. In our patient the occurrence of a plasmocytoma with a dramatic course leads to suspect an underlying complex genetic aberration.

Eosinophilia↗
PubMed1981

Malignant melanoma of the oral cavity.

The authors recount three cases of malignant melanomas in the oral cavity. The first was classified as malignant melanoma in situ, pagetoid type; the second as malignant melanoma, dendritic type; and the third as nodular malignant melanoma. These cases led the authors to compare the histopathologic features of malignant melanomas of the oral cavity with those of malignant melanomas of the skin and, finding them much the same, to advise early biopsies of all pigmented lesions in the oral cavity.

Aged↗