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        "titulo" => "Estudio Inmunohistoqu&#237;mico de la Calretinina en el Fol&#237;culo Piloso Normal y Neoplasias Con Diferenciaci&#243;n Folicular"
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        "titulo" => "Abstract"
        "resumen" => "<span class="elsevierStyleSectionTitle">Background</span><p class="elsevierStyleSimplePara elsevierViewall">Selective immunostaining for calretinin labels the innermost layer of the outer root sheath of normal hair follicles&#44; which is difficult to distinguish with hematoxylin-eosin staining&#46;</p> <span class="elsevierStyleSectionTitle">Objective</span><p class="elsevierStyleSimplePara elsevierViewall">The aim of this study was to determine whether immunohistochemistry for calretinin allows identification of cutaneous adnexal tumors with follicular differentiation towards cells of the outer root sheath&#46;</p> <span class="elsevierStyleSectionTitle">Material and methods</span><p class="elsevierStyleSimplePara elsevierViewall">We analyzed the staining pattern for calretinin by immunohistochemistry in 49 biopsies of cutaneous adnexal tumors with follicular differentiation&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p class="elsevierStyleSimplePara elsevierViewall">Fifteen biopsies corresponded to trichilemmomas&#47;inverted follicular keratosis and had staining for calretinin in the epithelium of the most superficial areas of the lesions and in squamous eddies&#46; Ten were trichilemmal cysts&#44; which displayed staining of the cyst wall&#46; Three were basal cell carcinomas with variable staining according to the type of follicular differentiation in each variant&#46; One was a panfolliculoma that had focal staining&#46; Two were folliculosebaceous cystic hamartomas with staining of the excretory duct of the sebaceous glands&#46; Two pilomatricomas and 3 proliferative trichilemmal tumors had positive staining in the cellular layers close to the lumen of the cystic structures&#46; Nine trichoblastomas&#47;trichoepitheliomas&#44; 2 infundibular cysts&#44; 1 dilated pore of Winer&#44; and 2 acanthomas of the follicular sheath were negative for calretinin&#46;</p> <span class="elsevierStyleSectionTitle">Conclusion</span><p class="elsevierStyleSimplePara elsevierViewall">Immunohistochemistry for calretinin allows identification of cutaneous adnexal tumors of the hair follicle or a component of the follicle with differentiation towards cells of the outer root sheath&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Introducci&#243;n</span><p class="elsevierStyleSimplePara elsevierViewall">La inmunotinci&#243;n selectiva con calretinina evidencia la capa m&#225;s interna de la vaina radicular externa del fol&#237;culo piloso normal&#44; dif&#237;cil de distinguir con la tinci&#243;n de hematoxilina-eosina&#46;</p> <span class="elsevierStyleSectionTitle">Objetivo</span><p class="elsevierStyleSimplePara elsevierViewall">Conocer si calretinina nos permite identificar neoplasias anexiales con diferenciaci&#243;n hacia la vaina radicular externa del fol&#237;culo piloso&#46;</p> <span class="elsevierStyleSectionTitle">Material y m&#233;todos</span><p class="elsevierStyleSimplePara elsevierViewall">Hemos analizado el patr&#243;n de inmunotinci&#243;n para calretinina en 49 biopsias de distintas neoplasias anexiales cut&#225;neas con diferenciaci&#243;n folicular&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p class="elsevierStyleSimplePara elsevierViewall">Quince de las 49 tinciones correspond&#237;an a tricolemomas&#47;queratosis folicular invertida&#44; observ&#225;ndose positividad con calretinina en el epitelio de las &#225;reas m&#225;s superficiales de la lesi&#243;n y en los remolinos escamosos&#59; 10 quistes tricol&#233;micos con positividad en su pared&#44; tres carcinomas basocelulares con positividad variable dependiendo del tipo de diferenciaci&#243;n folicular de cada variante&#44; un panfoliculoma con positividad focal&#44; dos hamartomas seb&#225;ceos infund&#237;bulo-qu&#237;sticos con positividad en el conducto excretor de las gl&#225;ndulas seb&#225;ceas&#44; dos pilomatricomas y tres tumores tricolemales proliferantes con positividad en las capas celulares cercanas a la luz de las estructuras qu&#237;sticas&#44; 9 tricoblastomas&#47;tricoepiteliomas&#44; dos quistes infundibulares&#44; un poro dilatado de Winer y dos acantomas de la vaina folicular resultaron negativos&#46;</p> <span class="elsevierStyleSectionTitle">Conclusi&#243;n</span><p class="elsevierStyleSimplePara elsevierViewall">El estudio inmunohistoqu&#237;mico de la calretinina nos permite identificar neoplasias anexiales del fol&#237;culo piloso o componentes de &#233;ste&#44; con diferenciaci&#243;n hacia la vaina radicular externa del fol&#237;culo piloso&#46;</p>"
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Journal Information
Vol. 99. Issue 6.
Pages 456-463 (August 2008)
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Vol. 99. Issue 6.
Pages 456-463 (August 2008)
Original articles
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Immunohistochemical Study of Calretinin in Normal Hair Follicles and Tumors With Follicular Differentiation
Estudio Inmunohistoquímico de la Calretinina en el Folículo Piloso Normal y Neoplasias Con Diferenciación Folicular
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E. González-Guerraa,
Corresponding author
elenagonzalezguerra@yahoo.es

Correspondence: C/ Cabo Cañaveral, n.° 12, bajo A, 28023 Madrid, Spain.
, L. Requenaa, H. Kutznerb
a Servicio de Dermatología, Fundación Jiménez Díaz, Madrid, Spain
b Dermatopathology Laboratory, Friedrichshafen, Germany
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Article information
Abstract
Background

Selective immunostaining for calretinin labels the innermost layer of the outer root sheath of normal hair follicles, which is difficult to distinguish with hematoxylin-eosin staining.

Objective

The aim of this study was to determine whether immunohistochemistry for calretinin allows identification of cutaneous adnexal tumors with follicular differentiation towards cells of the outer root sheath.

Material and methods

We analyzed the staining pattern for calretinin by immunohistochemistry in 49 biopsies of cutaneous adnexal tumors with follicular differentiation.

Results

Fifteen biopsies corresponded to trichilemmomas/inverted follicular keratosis and had staining for calretinin in the epithelium of the most superficial areas of the lesions and in squamous eddies. Ten were trichilemmal cysts, which displayed staining of the cyst wall. Three were basal cell carcinomas with variable staining according to the type of follicular differentiation in each variant. One was a panfolliculoma that had focal staining. Two were folliculosebaceous cystic hamartomas with staining of the excretory duct of the sebaceous glands. Two pilomatricomas and 3 proliferative trichilemmal tumors had positive staining in the cellular layers close to the lumen of the cystic structures. Nine trichoblastomas/trichoepitheliomas, 2 infundibular cysts, 1 dilated pore of Winer, and 2 acanthomas of the follicular sheath were negative for calretinin.

Conclusion

Immunohistochemistry for calretinin allows identification of cutaneous adnexal tumors of the hair follicle or a component of the follicle with differentiation towards cells of the outer root sheath.

Key words:
calretinin
cutaneous adnexal tumors
follicular differentiation
companion layer
Resumen
Introducción

La inmunotinción selectiva con calretinina evidencia la capa más interna de la vaina radicular externa del folículo piloso normal, difícil de distinguir con la tinción de hematoxilina-eosina.

Objetivo

Conocer si calretinina nos permite identificar neoplasias anexiales con diferenciación hacia la vaina radicular externa del folículo piloso.

Material y métodos

Hemos analizado el patrón de inmunotinción para calretinina en 49 biopsias de distintas neoplasias anexiales cutáneas con diferenciación folicular.

Resultados

Quince de las 49 tinciones correspondían a tricolemomas/queratosis folicular invertida, observándose positividad con calretinina en el epitelio de las áreas más superficiales de la lesión y en los remolinos escamosos; 10 quistes tricolémicos con positividad en su pared, tres carcinomas basocelulares con positividad variable dependiendo del tipo de diferenciación folicular de cada variante, un panfoliculoma con positividad focal, dos hamartomas sebáceos infundíbulo-quísticos con positividad en el conducto excretor de las glándulas sebáceas, dos pilomatricomas y tres tumores tricolemales proliferantes con positividad en las capas celulares cercanas a la luz de las estructuras quísticas, 9 tricoblastomas/tricoepiteliomas, dos quistes infundibulares, un poro dilatado de Winer y dos acantomas de la vaina folicular resultaron negativos.

Conclusión

El estudio inmunohistoquímico de la calretinina nos permite identificar neoplasias anexiales del folículo piloso o componentes de éste, con diferenciación hacia la vaina radicular externa del folículo piloso.

Palabras clave:
calretinina
neoplasias anexiales con diferenciación folicular
capa compañera
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Copyright © 2008. Academia Española de Dermatología y Venereología and Elsevier España, S.L.
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