The detailed descriptions about clinical features and management of the different types of peripheral neuropathy are beyond the scope of this article. It may be appropriate here to outline general aspects of clinical features and classification of peripheral neuropathies. The clinical history and the abnormalities revealed by physical examination may either suggest the diagnosis or narrow down the diagnostic possibilities, facilitating subsequent investigation. Nerve conduction studies can provide crucial information and are best performed at initial examination. In general, the first broad determination should be made whether the patient has symmetrical polyneuropathy or focal, or multifocal neuropathies. The range of diagnostic possibilities differs between symmetrical polymeuropathy and mutifocal neuropathy. For those patients with symmetrical polyneuropathy, the clinical pattern (that is, whether it is motor, sensory, or mixed, or whether it has proximal or distal distribution) can provide useful information, as well as the rapidity of onset and previous clinical course in established cases. Managements of peripheral neuropathy and planning of its treatment mostly depend on the confirmative diagnosis of peripheral neuropathy. Thus, the best knowledge and understanding of basic principles of peripheral neuropathies are required for facilitating the diagnosis of peripheral neuropathies.
Classification ; Diagnosis* ; Humans ; Neural Conduction ; Peripheral Nervous System Diseases* ; Physical Examination ; Polyneuropathies

No abstract available.
Osteotomy ; Overbite ; Prognathism

Dentistry ; Follow-Up Studies ; Humans ; Jaw Fixation Techniques ; Necrosis ; Surgery, Oral

BACKGROUND: Nevus depigmentosus was first reported in 1884 by Lesser. It is defined as a congenital non-progressive hypopigmented macule or patch that is stable in its relative size and distribution throughout the life of the individual. The etiopathogenesis and histopathological characteristics of nevus depigmentosus are not fully established. OBJECT: The purpose of this study is to investigate the clinical and histopathological characteristics and pathogenesis of nevus depigmentosus. METHODS: Clinieal survey was carried out on forty-nine patients with nevus depigmentosus and two skin biopsies were taken from eighteen patients; from the central part of the depigmented lesion and the border of the lesion including the perilesional normal skin. The sections were stained with hematoxylin-eosin, Fontana-Masson and S-100 protein. The ultrastructural evaluation were also done to detect alternation of melanocytes. RESULTS: The results are as follows ; 1. The lesions were mostly (91.8%) present before the age of three, but some lesions appeared in childhood (8.2%). 2. The lesions were most frequently found on the trunk (42.9%), followed by the face and scalp (20.4%). 3. There were 33 patients (67.3%) with the isolated type, 15 patients (30.6%) with the dermatomal type and one patient with the whorled type. 4. Histopathological studies have shown that the stainability of Fontana-Masson in the lesions of nevus depigmentosus was decreased compared with perilesional nomal skin, but there were no changes in the number of melanocytes. 5. There was a great reduction in the number of melanosomes in melanocytes and keratinocytes of nevus depigmentosus. In keratinocytes, there was some aggregations of melanosomes and some of them showed membrane bound architecture. CONCLUSION: The results of this study support the fact that nevus depigmentosus is caused by functional defects of melanocytes and morphological abnonnalities of melanosomes.
Biopsy ; Humans ; Keratinocytes ; Melanocytes ; Melanosomes ; Membranes ; Nevus* ; S100 Proteins ; Scalp ; Skin

BACKGROUND: Monofunctional psoralens plus UVA radiation are not severely phototoxic and have less mutagenic activity than bifunctional psoralens plus UVA radiation. OBJECTIVE: The purpose of this study was to evaluate pigment producing effect using various concentrations(0.02%, 0.1%, 0.5%) of monofunctional psoralens such as angelicin, khellin and comparing it's effect with TMP in topical photochemotherapy. METHOD: Ninty three C57BL mice were painted with either angelicin, khellin or TMP solution in concentrations of 0.02%, 0.1% and 0.5% each and were UVA irradiated. Skin biopsies were performed at 1,3,5 weeks after UVA irradiation. The pigment producing effects were measured by the number, area and perimeter of the melanocytes after topical PUVA. RESULTS: The comparison of melanocyte numbers between different psoralens after five weeks of photochemotherapy showed a significant difference in decreasing order of TMP, khellin and angelicin. The area and perimeter of melanocytes were larger in the TMP group after five weeks photochemotherapy than the other group. However in the khellin and angelicin group, the area and perimeter of melanocytes were not increased by increasing the frequency of the UVA irradiation. CONCLUSION: The number, area and perimeter of melanocytes after topical PUVA increased in the TMP group compared to angelicin or khellin group. We expect the clinical application of angelicin and khellin in vitiligo is possible considering the result of the study of pigment producing effect with a higher concentration and higher dose of UVA.
Animals ; Biopsy ; Ficusin* ; Furocoumarins ; Khellin ; Melanocytes* ; Methods ; Mice* ; Mice, Inbred C57BL ; Paint ; Photochemotherapy* ; Skin ; Thymidine Monophosphate ; Vitiligo

No abstract available.
Connective Tissue* ; Nevus*

We present cases of localized idiopathic lipoatrophy occurring in two women. A 19-year-old girl had symmetrically distributed annular telangiectatic atrophy on both buttocks and a 44-year-old female had annular telangiectatic atrophy on the right buttock. The histopathologic findings of these lesions revealed numerous capillaries, various sized lobules with small round or spindle shaped cells on a background of hyaline material in subcutaneous layer. Two cases of lipoatrophy which shows the involutional phase are reported.
Adult ; Atrophy ; Buttocks ; Capillaries ; Female ; Humans ; Hyalin ; Young Adult

Carcinsarcoma is an uncommon pulmonary malignancy characterized by carcinmatous parenchyma and sarcomatous stroma. The cytologic, immunohistochemical and ultrastructural features of a case of pulmonary carcinosarcoma suspected by fine needle aspiration cytology is presented. Only bizarre spindle cells arranged in loose groups, in microtissue fragments and in a dissociate fashion were present in the aspiration smears. They were markedly positive for vimentin. The epithelial component was not found, which was probably due to marked paucity of carcinomatous component that was proved by histologic examination of the resected tumor. The diagnosis of pulmonary carcinosarcoma should be conidered whenever poorly differentiated epithelial cell groups with a malignant mesenchymal component set in a myxoid background are seen in a pulmonary cytology specimen.
Biopsy, Fine-Needle ; Carcinosarcoma ; Child* ; Diagnosis ; Epithelial Cells ; Humans ; Interleukin-6* ; Nephritis* ; Purpura, Schoenlein-Henoch* ; Vimentin

No abstract available.
Nevus, Epithelioid and Spindle Cell*

No abstract available.
Breast Neoplasms* ; Breast*