PubMed Health⌕ Search

Biomedical subjects

J C Maize

Publications and source records attributed to J C Maize.

At least 73 records · Page 4Linked to original sources
PubMed1985

Direct and indirect immunofluorescent findings in dermatomyositis.

Three skin biopsies (proximal nailfold, extensor forearm and buttock) and serum samples were studied by direct and indirect immunofluorescence, immunodiffusion and radioimmunoassay techniques in 6 patients with dermatomyositis. A variety of serologic and immunopathologic abnormalities was observed in the patients. Three of 6 patients had antinuclear antibodies (ANA) of a speckled pattern mixed with a peculiar dot pattern. Epidermal intercellular deposits of immunoglobulins were seen in the nailfold biopsies of 2 patients; one of them also had IgG deposits in the cytoplasm of epidermal cells. Forearm and buttock biopsies were negative.

Adolescent↗
PubMed1985

Epidermotropic urothelial carcinoma involving the glans penis.

A case of epidermotropic carcinoma involving the urethral meatus and the skin of the glans penis was associated with primary transitional cell carcinoma of the urinary bladder with urethral extension. The histopathologic and histochemical features were identical to those seen in extramammary Paget's disease. There was positive intracytoplasmic staining for the carcinoembryonic antigen with the use of an immunoperoxidase stain, another similarity between this neoplasm and extramammary Paget's disease. However, these staining characteristics are consistent with those of the primary bladder tumor and with staining patterns described in the literature for urothelial carcinoma.

Carcinoma, Transitional Cell↗
PubMed1985

Melanocytic nevi and malignant melanoma.

It has been known for a long time that melanoma can have its origin in congenital or acquired melanocytic nevi. In regard to congenital nevi, there is sufficient evidence to state that large lesions (those greater than 20 cm in diameter) have a significant risk factor that is several-fold greater than for common acquired nevi. Prophylactic excision of such lesions should be strongly considered when it is feasible, but individual circumstances must be taken into account. The risk factors for small and medium-sized congenital nevi have not been accurately determined; therefore, no uniform recommendation can be made regarding their management. There is no objective evidence to indicate that common acquired nevi in any particular anatomic sites, such as volar or genital skin, are at greater risk for the development of melanoma than are any others. Patients with familial dysplastic nevus syndrome must be identified and followed carefully in order to recognize and eradicate evolving and early melanomas. The concept of the sporadic dysplastic nevus syndrome is intriguing and deserves careful study to further define the clinical and histologic diagnostic criteria that will enable accurate determination of its prevalence and risk factors.

Epidermis↗
PubMed1984

Nailfold biopsy in scleroderma and related disorders. Correlation of histologic, capillaroscopic, and clinical data.

Although nailfold capillary abnormalities associated with connective tissue disease (CTD) have been studied by direct in vivo microscopy, little is known of the underlying histology and morphology of this tissue. This report summarizes light microscopic study of glycolmethacrylate embedded nailfold biopsies from 13 CTD patients (9 scleroderma, 2 CREST, 2 undifferentiated CTD), 2 subjects with Raynaud's phenomenon alone, and 9 normal volunteers of similar age and sex distribution. The most striking and consistent finding was the presence of globular, eosinophilic, PAS-positive deposits in the cuticles of 14 of 15 patients and none of the controls. This material, identified by immunofluorescent staining as serum protein exudates, was associated with pronounced parakeratosis and elevated epithelial mitotic activity. Capillary ectasia with thinning of the basement membrane was often present in CTD biopsies. Occasional signs of endothelial swelling and proliferation were encountered in both populations. Inflammatory changes were rarely seen. In quantitative comparison with control tissues, the superficial dermis from CTD patients contained significantly fewer capillaries, cutaneous nerve bundles, and interstitial fibroblasts per unit area and fewer papillary capillaries per unit of epidermal length. Measures of capillary density in sectioned tissue correlated well with the results of in vivo microscopic examination.

Adult↗
PubMed1984

Myxopapillary ependymoma of the cauda equina with extension to the skin of the sacrococcygeal region.

Cutaneous involvement by myxopapillary ependymoma of the cauda equina is described clinically and morphologically. The patient, a young woman, was 12 years old at the time that the neoplasm was diagnosed. Skin involvement developed 12 1/2 years following the initial diagnosis of the primary neoplasm and after the third attempt at surgical extirpation. Involvement of the skin preceded the death of the patient by 11 months.

Adolescent↗
PubMed1984

The effect of aging and chronic sun exposure on human Langerhans cell populations.

ATPase histochemistry was used to examine Langerhans cell (LC) populations in the skin of young persons with no evidence of solar damage and older adults with chronic actinically damaged skin. The number of LC was significantly decreased in the older age group. Significantly fewer LC were observed in exposed vs covered skin in the older individuals; no such disparity was noted in the younger subjects. Morphologic alterations in ATPase-positive cells were noted in some specimens, most of which were taken from the exposed skin of elderly persons. The results suggest an independent, although possibly additive, quantitative and qualitative influence of aging and chronic sun exposure on the LC population. Decreased numbers of LC in the sun-damaged skin of elderly individuals may play a critical permissive role in the development of cutaneous carcinoma.

Adenosine Triphosphatases↗
PubMed1984

Clear-cell syringoma. A study by conventional and electron microscopy.

The epithelial component of a syringoma is usually composed of cuboidal cells that have a moderate amount of eosinophilic cytoplasm in tissue sections stained with hematoxylin and eosin. Some syringomas have variable numbers of larger epithelial cells that have pale or clear cystoplasm. Such lesions have been called clear-cell syringomas. Examination of 18 cases by conventional microscopy revealed that their general organization is the same as ordinary syringomas but that the epithelial component constitutes a greater proportion of neoplastic volume. Histochemical studies confirmed that the clear cells contain abundant glycogen. The cells near lumina also contained a mucous substance that had a staining profile consistent with sialomucin. Examination by electron microscopy of two lesions composed entirely of clear cells revealed numerous multivesicular bodies, some in large aggregates, in periluminal cells. All cells contained numerous glycogen granules. Lesions in which there were incomplete changes in clear cells tended to have cells predominantly around the lumina. These observations suggest that the majority of clear cells result from accumulation of glycogen. The periluminal cells may be clear owing to the large number of multivesicular bodies and storage of sialomucin in them.

Adenoma↗
PubMed1983

Coexisting lichen planus and bullous pemphigoid or lichen planus pemphigoides?

A patient with lichen planus pemphigoides is reported. Initial pathologic and immunopathologic evaluation was consistent with coexisting bullous pemphigoid and lichen planus. However, further immunologic evaluation suggested that the circulating antibody was not directed toward bullous pemphigoid antigen but another basement membrane zone antigen. This finding indicates a need for immunologic re-evaluation of lichen planus pemphigoides.

Adult↗
PubMed1983

Primary cutaneous malignant melanoma.

The prognosis of localized malignant melanoma is related to several histologic features of the primary lesion. Growth pattern, level of invasion, and tumor thickness are currently most widely used in clinical practice, but other features, including ulceration, mitotic rate, density of the inflammatory response, evidence of partial regression, angioinvasion, cell type, cross-sectional profile, and amelanosis have been accorded prognostic significance in single factor analyses. Although stringently controlled prospective studies have yet to demonstrate the validity of these factors for the determination of optimal surgical treatment in individual cases, newer statistical methods of multivariate analysis have made possible assessment of the relative importance of each of these histologic characteristics. The most important and reproducible factor for predicting survival is maximum tumor thickness. Consensus also supports ulceration as another important, independent prognostic indicator, whereas growth pattern and level of invasion derive most of their prognostic value from a secondary correlation with tumor thickness. Mitotic rate may influence survival in the subgroup of patients with high-risk, thick melanomas.

Humans↗
PubMed1983

Value of immunofluorescent techniques in studies of bullous disease.

The findings from immunofluorescent techniques have made a profound contribution to our knowledge of bullous diseases. The techniques, once considered investigational, are now routinely employed in dermatologic diagnostic tests. Direct immunofluorescent methods applied to specimens of perilesional skin are extremely reliable to demonstrate characteristic deposition of various immunoreactants in pemphigus vulgaris, bullous pemphigoid, and dermatitis herpetiformis. Autoantibodies in serum revealed by indirect immunofluorescent techniques, are demonstrable in most cases of pemphigus vulgaris and bullous pemphigoid. The disappearance of these antibodies from the skin and serum of patients so afflicted appears to herald remission of their diseases. Thus, detection of these antibodies may be employed to regulate therapy for maximum effect.

Dermatitis Herpetiformis↗
PubMed1982

Maternal pemphigus vulgaris with in vivo bound antibodies in the stillborn fetus.

A 42-year-old black woman, gravida V, para IV, developed a recurrence of pemphigus vulgaris in the third trimester of pregnancy. She delivered a 2,056-gm stillborn female fetus in the seventh month, 2 days after ultrasonography had demonstrated absence of fetal cardiac activity and other evidence of intrauterine fetal death. The macerated fetus had peeling of its skin and an intact bulla on the foot. Fetal cardiac blood, obtained after delivery, showed the presence of pemphigus antibodies at a titer of 20. Direct immunofluorescence of fetal skin demonstrated IgG in the epidermal intercellular spaces. Autolytic changes of the skin, however, precluded definitive histologic documentation of acantholytic disease.

Adult↗
PubMed1982

Pemphigus foliaceus: a case with serologic features of Senear-Usher syndrome and other autoimmune abnormalities.

The two variants of superficial pemphigus, pemphigus erythematosus (Senear-Usher syndrome) and pemphigus foliaceus, share common histopathologic and indirect immunofluorescence findings. They differ in that pemphigus erythematosus is limited in distribution and usually has concomitant basement membrane zone deposition of immunoglobulin and complement in lesional skin in addition to intercellular space staining in the epidermis, whereas pemphigus foliaceus is a generalized process that reputedly lacks basement membrane zone staining. A 49-year-old man with an array of immunologic abnormalities, including pernicious anemia and Sjögren's syndrome consistent with broad immunologic dysfunction, developed generalized superficial pemphigus (pemphigus foliaceus) with concomitant basement membrane zone immunoreactant deposition. The demonstration of basement zone immunofluorescent staining lends additional support to the basic viewpoint that pemphigus erythematosus and pemphigus foliaceus are variable phenotypic expressions of the same basic disease process.

Autoimmune Diseases↗
PubMed1981

Vasculitis in chronic urticaria: an immunopathologic study.

Forty-five patients with chronic urticaria were studied to determine: (1) the histologic incidence of leukocytoclastic vasculitis and (2) the clinical, laboratory and immunopathologic parameters that characterized this patient group. By histopathologic examination a spectrum of changes were noted as 9 patients showed leukocytoclastic vasculitis, 15 a dense perivascular infiltrate of lymphocytes and eosinophils, and 21 only a sparse lymphocytic perivascular infiltrate. Both the vasculitis and the dense infiltrate groups had an increased incidence of circulating immune complexes, as detected by Clq binding and monoclonal rheumatoid factor inhibition radioassays. Direct immunofluorescence showed blood vessel deposition of immunoglobulins, complement, and/or fibrin in 33% of the vasculitis group, 13% of the dense infiltrate group, and 9% of the sparse infiltrate group. These studies suggest that a meaningful number of patients with chronic urticaria have histologic and immunopathologic findings of vasculitis.

Adolescent↗
PubMed1980

Melanomas of the palm, sole, and nailbed: a clinicopathologic study.

Acral lentiginous melanoma is a newly recognized subtype of malignant melanoma that occurs on volar and subungual skin. Histologic examination of 69 primary volar and subungual melanomas revealed 31 (45%) acral lentiginous, 18 (26%) superficial spreading, and two (3%) nodular melanomas. Eighteen biopsies were inadequate for subclassification. Seventy-one percent (49/69) occurred on plantar skin, 10% (7/69) on the palm, and 19% (13/69) on nailbeds. Plantar melanomas occurred most frequently on weight-bearing areas, particularly the heel (45%). Most were level 4 or 5 at the time of diagnosis. The overall five-year survival of patients with plantar melanomas was 43%. The mitotic rate showed an inverse relationship with survival. The ratio of volar skin melanomas to subungual melanomas was 4:1. Ninety-two percent of subungual melanoma occurred on the thumb or great toe. The five-year survival for palmar and subungual melanomas was 19%. Our data confirm that acral lentiginous melanoma is a distinct subtype of melanoma with a unique histologic appearance and behavior, but not all volar and subungual melanomas are the acral lentiginous type.

Adult↗
PubMed1980

Epidermolysis bullosa acquisita: a clinical disorder of varied etiologies. Two cases and a review of immunologic and other reported findings.

Epidermolysis bullosa acquisita (EBA) is an acquired mechanobullous disorder characterized by traumatically induced bullae in skin subjected to frictional injury, i.e., acral extensor surfaces or any point of sufficient mechanical distress. Two new patients with EBA are reported. Histopathologic findings were subepidermal ballae with sparse superficial perivascular mononuclear cell inflammatory infiltrates. The periodic acid-Schiff (PAS)-positive basement membrane zone (BMZ) was split between the floor and roof of the blisters with most attached to the blister roof. Electron microscopy of normal skin from one patient revealed a bandlike zone of granular material within the dermis immediately beneath the basal lamina. Nonbranching filaments were embedded in the granular material. Electron microscopy of normal skin from the second patient revealed a markedly diminished density of anchoring fibrils but no granular material. Immunologic findings in skin biopsies were C'3, IgG, and other immunoglobulins in varying combinations in both cases and in all reported cases. Comparisons of direct immunofluorescent (IF) findings in nine reported cases with 223 cases of bullous pemphigoid (BP) suggest that BMZ deposits of IgG plus IgA and/or IgM occur more frequently in EBA than in BP. Indirect IF studies of patients' sera revealed antibodies to the BMZ in two samples of one of our two cases and in one of seven cases reported by others. While both EBA and BP characteristically yield positive IF findings in the BMZ, clinical, electron microscopic, and some immunopathologic findings indicate that the two diseases are distinct.

Adult↗
PubMed1980

The blue-gray cystic basal cell epithelioma.

We report, in two men, the occurrence of a tiny, dome-shaped, blue-gray cystic nodule of the face. The nodule in both men clinically simulated an eccrine or apocrine hidrocystoma. Histologic examination revealed that both were cystic basal cell epitheliomas. These cases are reported in order to bring this unusual clinical presentation of basal cell epithelioma to the attention of clinicians.

Basal Cell Carcinoma↗