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Glandular Structures (glandular + structure)

Distribution by Scientific Domains

Medical Sciences	93%

Distribution within Medical Sciences

Pathology	39%
Dermatology	33%

Selected Abstracts

Multiple nodules of the scrotum: histopathological findings and surgical procedure.

JOURNAL OF THE EUROPEAN ACADEMY OF DERMATOLOGY & VENEREOLOGY, Issue 6 2006
A study of five cases
Abstract Background, Multiple nodules of the scrotum are uncommonly reported. Their origin is controversial. Treatment is always surgical but the best procedure is still to be determined. Materials and methods, Five new cases are reported with description of the histopathological findings and surgical procedure. Results, Nodules of the scrotum were more frequent in patients with dark skin suggesting an ethnic susceptibility. No other predisposing factors were noted. Screening for disturbances of phosphate or calcium balance was negative. The following histopathological findings were observed: non-calcified epidermoid cysts (3 patients), calcified epidermoid cysts (1 patient) and nodular calcifications without epithelial or glandular structures (1 patient). Subtotal excisions of the scrotum wall using tumescent anaesthesia were performed in all patients without any significant complications. Cosmetic results were excellent. No new lesions were observed during the 1-year follow-up period. Conclusions, Most cases of multiple nodules of the scrotum are due to non-calcified epidermoid cysts. The term scrotal calcinosis is therefore probably abusively used by many authors. Some cases of nodular calcifications may be due to dystrophic calcification of epidermoid cysts, but calcifications may also occur without any visible epithelial or glandular structure. Subtotal excision of the scrotum wall is a safe and effective surgical procedure to treat multiple nodules of the scrotum. Cosmetic results are excellent and recurrences are rare. [source]

Anal canal neuroendocrine carcinoma with Pagetoid extension

PATHOLOGY INTERNATIONAL, Issue 8 2004
Limei Guo
A case of anal canal neuroendocrine carcinoma with Pagetoid intraepithelial extension is presented. An 80-year-old man was admitted to hospital with a complaint of pain in the anorectal region. Clinical examination revealed a hard and fixed mass in the anal canal, and subsequent biopsy of the lesion showed it to be a carcinoma. The surgically resected specimen showed a solid tumor measuring 3.4 × 3.2 cm within the area from the surgical anal canal to the anatomical anal canal. Tumor cells proliferated predominantly with compact nests. Many tumor cells had a high nuclear-to-cytoplasmic ratio, dispersed chromatin, and conspicuous nucleoli. Additionally, neoplastic cells focally formed a glandular structure. Some polygonal neoplastic cells were small with round nuclei. A rosette-like arrangement was also focally observed. In addition, tumor cells exhibited Pagetoid extension into the overlying epithelium of the histological anal canal. Both the underlying original neoplastic cells and the Pagetoid spreading tumor cells showed cytoplasmic granules positive for Grimelius staining and immunopositivity for carcinoembryonic antigen, synaptophysin and cytokeratins 7 and 20. These findings are highly suggestive of neuroendocrine differentiation of adenocarcinoma cells. To the best of our knowledge, this is the first case of anal canal neuroendocrine carcinoma with Pagetoid extension into the overlying epithelium of the histological anal canal. [source]

Secondary breast cancer: a 5-year population-based study with review of the literature

APMIS, Issue 10 2009
TOR AUDUN KLINGEN
Secondary tumours in the breast are rare. Based on literature, an incidence of 0.4,2% is reported. In this population-based study, secondary breast tumours from a 5-year period (2001,2005), not including metastasis from contralateral breast carcinoma, were reviewed (Vestfold County, Norway). A total of 722 patients with breast malignancies were found in this population (89.3% from Vestfold County Hospital). Ten of these, approximately 1.4%, were metastatic tumours, representing four cutaneous melanomas, three pulmonary carcinomas and three malignant lymphomas. The tumours were often solitary, palpable and close to the skin. Radiologically, the lesions mostly resembled primary carcinomas by mammography and ultrasound, which differs from other studies. Comparison with a known primary tumour and use of immunohistochemical profiling is of crucial importance. Melanoma markers (Melan-A, HMB-45, S-100 protein), lung cancer markers (Cytokeratins, TTF1, Chromogranin, Synapthophysin) and lymphoid markers (CD3, CD20) usually help to confirm a secondary breast tumour diagnosis. This approach is especially indicated in diffusely growing tumours with lack of glandular structure and high-grade cytological features, and staining for ER and GCDFP15 may be helpful. Thus, the diagnosis of a breast metastasis may be suspected by careful mammography and ultrasound imaging, although some cases have atypical radiological features, and histological examination might be necessary to ensure a correct diagnosis and appropriate treatment. [source]

The absence of apoeccrine glands in the human axilla has disease pathogenetic implications, including axillary hyperhidrosis

BRITISH JOURNAL OF DERMATOLOGY, Issue 6 2007
D.L. Bovell
Summary Background, The existence of a third type of sweat gland in human axillary skin, the apoeccrine gland, with a capacity to produce much higher sweat output than the eccrine gland, was proposed from examination of microdissected glands. However, previous studies of axillary skin glands did not examine the entire individual glandular structure via serial sections and the markers used to identify the different glands gave conflicting results and, hence, the existence of the apoeccrine gland remains controversial. Objectives, To investigate human axillary sweat glands by serial section histology and immunofluorescence. Methods, Human axillary sweat glands were investigated by serial sectioning of paraffin wax-embedded skin samples taken by biopsy from four male and six female volunteers (age range 20,35 years). Sections were examined by light microscopy and immunofluorescence, using antibodies to antigens reported to be markers for discriminating between eccrine and apocrine gland cells: CD15, CD44, S100 and human milk fat globulin. Results, Light microscopy demonstrated that there were hair follicles and a mean ± SD of 76 ± 14 sweat glands cm,2. Eccrine and apocrine glands were found to be present; however, no glands resembling the apoeccrine glands were detected. Both types of sweat gland exhibited signs of being active, with segments of the secretory coils displaying flattened cells and dilated glandular lumina; however, this dilation did not extend to obvious changes in the width of the gland. None of the eccrine glands exhibited evidence of the presence of apocrine cells or vice versa. Immunofluorescence markers were found not to be specific and did not discriminate between the different types of glands or demonstrate the presence of apoeccrine glands. Conclusions, This is the first time that serial sections of axillary skin have been examined by histology and immunofluorescence. The markers reported to discriminate between apocrine and eccrine glands were found to be nonspecific. No evidence of apoeccrine glands was found either by histology or by immunofluorescence. [source]

Fine-needle aspiration biopsy findings in sclerosing polycystic adenosis of the parotid gland

DIAGNOSTIC CYTOPATHOLOGY, Issue 7 2007
Demet Etit M.D.
Abstract Sclerosing polycystic adenosis (SPA) is a recently described, rare lesion of the salivary gland analogous to fibrocystic disease of the breast. Recognition of this benign entity is important since the differential diagnosis includes other more common benign and malignant salivary gland neoplasms, particularly mucoepidermoid carcinoma and tumors with cystic and oncocytic features. While the histomorphology of SPA is well documented, there is only one other cytologic description of SPA in the English-language literature. Here we describe the fine-needle aspiration biopsy findings in a case of SPA of the parotid gland in an 84-year-old woman. The aspirate was characterized by flat cohesive sheets of epithelial cells with moderate amounts of finely granular oncocytic cytoplasm and enlarged round nuclei with indistinct nucleoli. Some epithelial groups formed glandular structures with lumens, and the background contained small amounts of delicate mucoproteinaceous material. Occasional markedly vacuolated cells were present as well as many cells with apocrine change manifested by well-defined apical snouting. Familiarity with the cytomorphologic features of SPA, including its characteristic apocrine changes, is important for distinguishing it from other more clinically significant salivary gland lesions. Diagn. Cytopathol. 2007;35:444,447. © 2007 Wiley-Liss, Inc. [source]

Immunoexpression of extracellular matrix proteins in human salivary gland development

EUROPEAN JOURNAL OF ORAL SCIENCES, Issue 6 2004
Cristiane Furuse
Immunoexpression of the extracellular matrix (ECM) proteins laminin, fibronectin, tenascin and types I, III and IV collagen was analyzed in the major and minor salivary glands of seven human fetuses at different gestational ages. The results showed the presence and localization of laminin, collagen IV and fibronectin around glandular structures at all stages of development. Tenascin was only detectable around excretory ducts. In the earliest stages of development, type I and type III collagen were presented as fine fibers delineating the glandular structures and delimiting the extension of the future lobule. As glandular development proceeded, the lobule was gradually filled with collagens and glandular tissue. [source]

Myoepithelioma of the Skin with P63 Expression

JOURNAL OF CUTANEOUS PATHOLOGY, Issue 1 2005
M.J. Smith-Zagone
A case of cutaneous myoepithelioma is reported. A 37 year-old woman presented with a 2 cm well-circumscribed dermal nodule of the forehead. The tumor was enucleated with the clinical diagnosis of an epidermal inclusion cyst. Histologically, the tumor was located within the dermis and was well circumscribed. It was composed of spindle-shaped and epithelioid cells arranged in organoid nests. Focal areas of extracellular hyalinized stroma were present. Well-defined glandular structures, chondroid matrix, and significant nuclear pleomorphism were absent. The tumor expressed widespread cytoplasmic positivity for cytokeratin (using AE1/AE3) and nuclear positivity for p63. Variable reactivity was noted with EMA and S-100. The tumor was negative for smooth muscle actin, GFAP, chromogranin, synaptophysin, and CEA. These immunohistochemical results supported myoepithelial differentiation. Myoepitheliomas of the skin are rare neoplasms that have only recently been recognized in the skin. A single publication has reported the diagnostic utility of p63 in the diagnosis of myoepithelial tumors of the skin. Myoepitheliomas often display variable expression of myoepithelial markers, with no single marker that is 100% sensitive. The current case highlights the need for a battery of markers, including p63, to detect myoepithelial differentiation. [source]

Cutaneous myoepithelial neoplasms: clinicopathologic and immunohistochemical study of 20 cases suggesting a continuous spectrum ranging from benign mixed tumor of the skin to cutaneous myoepithelioma and myoepithelial carcinoma

JOURNAL OF CUTANEOUS PATHOLOGY, Issue 5 2003
Thomas Mentzel
Background:, Myoepithelial neoplasms, both benign and malignant, are rare but well-established clinicopathologic entities in the salivary glands, the breast, and the lung. Despite similarities between cutaneous sweat glands and glandular structures in the above-mentioned organs as well as the presence of regular myoepithelial cells around cutaneous eccrine/apocrine glands, the concept of cutaneous myoepithelial neoplasms is still debatable and not commonly accepted. Methods:, Twenty cutaneous myoepithelial neoplasms have been studied histologically and immunohistochemically. Results:, Nine neoplasms showed features of benign mixed tumor of the skin (chondroid syringoma) (five females and four males, age range 19,65 years, all cases arose in the head and neck region). Two cases represented the eccrine and seven the apocrine subtype. Interestingly, in three cases of the apocrine subtype, solid areas composed predominantly of myoepithelial cells were detected; these neoplasms were designated as benign mixed tumors with prominent myoepithelial cells. Nine cutaneous neoplasms were composed of spindled, epithelioid, and plasmocytoid cells without ductal differentiation and immunohistochemically stained variably positive for vimentin, epithelial and myogenic markers, S-100 protein, calponin, and glial fibrillary acidic protein (four females and five males, age range 3,71 years, four cases arose in the head and neck region and one case each on the finger, the thigh, the lower leg, the foot, and the breast, respectively); these neoplasms were designated as cutaneous myoepitheliomas. Two morphologically malignant neoplasms with cytologic and immunohistochemical features of myoepithelial cells arose on the face of a 70-year-old female and a 79-year-old male patient; these neoplasms were designated as malignant cutaneous myoepitheliomas (cutaneous myoepithelial carcinomas). Conclusions:, The study suggests a continuous spectrum of cutaneous myoepithelial neoplasms ranging from benign mixed tumor of the skin to cutaneous myoepithelioma and cutaneous myoepithelial carcinoma. Further studies with extended follow-up information are necessary to establish prognostic factors. [source]

Multiple nodules of the scrotum: histopathological findings and surgical procedure.

Cystadenoma of the palate: Immunohistochemistry of mucins

PATHOLOGY INTERNATIONAL, Issue 8 2008
Kimihide Kusafuka
Cystadenoma is a relatively rare benign epithelial tumor of the salivary glands, and described herein is an additional case. A 51-year-old Japanese man had noticed a mass of the left hard palate 25 years previously. Macroscopically, the resected specimen was a multicystic lesion. Histologically, the tumor was composed of bilayered columnar epithelium with cystic change and partial solid growth of glandular structures with clear cells. The tumor cells had mild cellular atypia, but the tumor lacked papillary growth and a fibrous capsule. Immunohistochemistry was positive for cytokeratins, epithelial membrane antigen, MUC1, MUC4 and MUC6, but negative for myoepithelial markers, MUC2, MUC5AC and MUC5B. Such MUC expression patterns suggested that cystadenoma occurs from excretory ducts. [source]

Expression of E-cadherin and catenins in meningioma: Ubiquitous expression and its irrelevance to malignancy

PATHOLOGY INTERNATIONAL, Issue 1 2005
Shio Shimada
The expression of cell adhesion molecules in 107 meningiomas was analyzed with immunohistochemical methods using antibodies to epithelial (E)-cadherin and catenins (,, , and ,). According to the provided World Health Organization (WHO) grading, 84, 18 and five cases were classified as grade I, II and III, respectively. In addition, hemangioblastoma (15 cases) and hemangiopericytoma (four cases) were also evaluated. In most meningiomas, E-cadherin, ,- and ,-catenins were expressed along the cell membrane or inside the cytoplasm. The tumor cells constituting whorls and glandular structures of secretory type showed a strong immunoreactivity. ,-Catenin expression tended to be weak and infrequent in fibrous meningiomas, while other types exhibited diffuse stainings. Even in meningiomas of more than grade II, the expressions of cell adhesion molecules were detected in all cases. Hemangiopericytoma was positive for ,- and ,-catenins, and hemangioblastomas were positive for ,-catenin alone, which was distinct from the expression pattern in meningiomas. Quantitatively, there were no correlations between the histological variants, Ki-67 indexes, or grades of meningiomas and the immunoreactive scores except for ,-catenin scores of fibrous meningiomas. The present study demonstrates that cell adhesion molecules are ubiquitously expressed in all variants of meningioma and may be involved in the tumor morphogenesis. This result suggests that the expression of cell adhesion molecules is not a reliable indicator of malignancy in meningiomas. The present study also suggests that these markers may be useful for the differential diagnosis of meningioma. [source]

Blastomatous tumor with teratoid features of nasal cavity: Report of a case and review of the literature

PATHOLOGY INTERNATIONAL, Issue 1 2000
M. Salih Deveci
A case of blastomatous tumor with teratoid features is presented. The polypoid mass was observed in the left nasal cavity of a 72-year-old man. Histologically, the lesion was composed of neuroepithelial cells with blastomatous appearance, cystic squamous nests filled with keratin materials, many mucous glands, complex tubular and glandular structures with edematous fibroblastic stroma. Sinonasal neoplasms including teratoid components and immature neuroepithelium are exceedingly rare. We suggest that the term ,immature teratoma' is more suitable than blastoma or blastomatous tumor when there is no carcinomatous or sarcomatous component besides the immature neuroepithelium and teratoid elements. [source]

Immunocytochemical Detection of Synaptophysin in Enteric Neurones during Prenatal Development in the Rat Stomach

ANATOMIA, HISTOLOGIA, EMBRYOLOGIA, Issue 3 2004
M. Asar
Summary In this study, the localization and appearance of synaptophysin-immunoreactive (IR) nerve cells and their relationships with the developing gastric layers were studied by immunocytochemistry and light microscopy in the embryonic rat stomach. The stomachs of Wistar rat embryos aged 13,21 days were used. The first neuronal bodies and their processes containing synaptophysin-immunoreactivity were observed on embryonic day 13. In contrast, synaptophysin-IR nerve terminals were first observed between mesenchymal cells on embryonic day 14. These results indicate that synaptophysin is expressed in growing neurits and neuronal cell bodies before these neurones have established synaptic connections. The occurrences of mesenchymal cell condensation near synaptophysin-IR neuroblasts on embryonic day 15 reflect an active nerve element-specific mesenchymal cell induction resulting in the morphogenesis of muscle cells. Similarly, the appearance of glandular structures after synaptophysin-IR neuroblasts, on embryonic day 18, suggests that the epithelial differentiation may be closely related to the neuronal maturation as well as other factors. Finally, synaptophysin is functionally important in neuronal development and maturation, together with the establishment of neuroneuronal and neuromuscular contacts and in epithelial differentiation. [source]

A 7-YEAR-OLD BOY WITH MIDLINE CEREBELLAR MASS

BRAIN PATHOLOGY, Issue 3 2005
Azzam Ismail MD
CASE OF THE MONTH: ABSTRACT January 2005. A boy aged 7 years was found to have a tumor arising from the roof of the fourth ventricle. Histopathologically, part of the tumor appeared as a PNET, while neuroglial tissue, striated and smooth muscle, cartilage and small glandular structures were present in other regions. Tumor cells in both primitive and mature elements showed a loss of chromosome 17p accompanied by a gain of 17q, a pattern consistent with the presence of an isochromosome 17q. This abnormality is not characteristic of intracranial germ cell tumors, but is present in over 30% of medulloblastomas. On the basis of the histologic and genetic abnormalities, we propose a diagnosis of PNET with multilineal differentiation. [source]

Zonal differentiation of the epithelium including the lid wiper at the human lid margin

ACTA OPHTHALMOLOGICA, Issue 2008
E KNOP
Purpose The lid margin represent the "other end" of the tear film and appear critically important for ocular surface integrity, in addition to the glandular structures that produce the tears. It guarantees the thin expansion of the tear film with every blink and prevents the leakage of tears over the lid border. However, the differentiation of the lid margin zones is insufficiently known as yet. Methods The upper and lower lid margin in human whole-mount specimens from ten body donors was investigated in serial section histology and compared to the image by in-vivo confocal microscopy in four eyes with a Heidelberg retina tomograph and Rostock cornea module (RLSM). Results At the inner lid border, following the keratinised epidermis of the free lid margin, a narrow zone (100-150µm) of para-keratinised squamous epithelium represented the muco-cutaneous junction (MCJ) corresponding to the line of Marx. This was followed by a much broader zone of epithelial thickening (50-100µm) that formed a kind of cushion, reclined sharply at the inner lid border and represented the so called lid wiper which extended for about 1mm and finally transformed into the epithelium of the sub-tarsal fold. MCJ and lid wiper extended all along the lid margin from nasal to temporal in upper and lower lid. Details of the epithelial structure as well as the underlying dermal papillae in these zones were also detectable by RLSM. Conclusion Due to its location and structure, the lid wiper appears as the structure that actually spreads the tear film and is distinct from the MCJ/line of Marx. Better knowledge of the lid margin structure and its different zones appears important for the understanding of ocular surface disease, in particular the dry eye disease. [source]

The mast cell and allergic diseases: role in pathogenesis and implications for therapy

CLINICAL & EXPERIMENTAL ALLERGY, Issue 1 2008
J. M. Brown
Summary Mast cells have long been recognized for their role in the genesis of allergic inflammation; and more recently for their participation in innate and acquired immune responses. Mast cells reside within tissues including the skin and mucosal membranes, which interface with the external environment; as well as being found within vascularized tissues next to nerves, blood vessels and glandular structures. Mast cells have the capability of reacting both within minutes and over hours to specific stimuli, with local and systemic effects. Mast cells express the high affinity IgE receptor (Fc,RI) and upon aggregation of Fc,RI by allergen-specific IgE, mast cells release and generate biologically active preformed and newly synthesized mediators which are involved in many aspects of allergic inflammation. While mast cells have been well documented to be essential for acute allergic reactions, more recently the importance of mast cells in reacting through pattern recognition receptors in innate immune responses has become recognized. Moreover, as our molecular understanding of the mast cell has evolved, novel targets for modulation have been identified with promising therapeutic potential. [source]