Background: Our previous study showed that large keratohyaline granules (KHG) in molluscum contagiosum that stained with haematoxylin also reacted with anti- Ted- H- 1 monoclonal antibody (mAb), but not with antifilag...Background: Our previous study showed that large keratohyaline granules (KHG) in molluscum contagiosum that stained with haematoxylin also reacted with anti- Ted- H- 1 monoclonal antibody (mAb), but not with antifilaggrin mAb or antiloricrin polyclonal antibody (pAb). This finding indicated that the Ted- H- 1 antigenic protein is a haematoxylin- stainable protein in KHG. Objectives: To clarify the identity of the major component protein of the large KHG in solar keratosis, another disorder in which large KHG are observed. Methods An enzyme immunohistochemical study was performed using antifilaggrin mAb, anti- Ted- H- 1 mAb and antiloricrin pAb. Immunofluorescent double staining and immunoelectron microscopic analyses were performed using anti- Ted- H- 1 mAb and antiloricrin pAb. Results: Antifilaggrin mAb, anti- Ted- H- 1 mAb and antiloricrin pAb reacted with normal KHG in nonlesional skin of solar keratosis, while only anti- Ted- H- 1 mAb reacted with the large KHG in the lesions of solar keratosis. Antifilaggrin mAb did not react with large KHG. Antiloricrin pAb reacted with the cell membrane of the stratum granulosum, but not with large KHG. Conclusions: These findings suggest that the haematoxylin- stainable protein in the large KHG would be a Ted- H- 1 antigen protein which was neither filaggrin nor loricrin.展开更多
Background: Granular parakeratosis (originally termed axillary granular parakeratosis) is an idiopathic, benign, nondisabling cutaneous disease that manifests with intertriginous erythematous, brown or red, scaly or k...Background: Granular parakeratosis (originally termed axillary granular parakeratosis) is an idiopathic, benign, nondisabling cutaneous disease that manifests with intertriginous erythematous, brown or red, scaly or keratotic papules and plaques. It presents in all age groups and has no established clinical associations. Objectives: We wanted to assess the following: (1) the incidence of granular parakeratosis in biopsy specimens; (2) the differential diagnosis submitted with specimens requisition of granular parakeratosis; and (3) variations in its histopathology. Methods: Between July 1, 1999 and December 31, 2003, 363,343 specimens were submitted to The Ackerman Institute of Dermatopathology in New York. Acomputersearch was done of these specimen records and cases diagnosed with granular parakeratosis were reviewed. A thickened stratum corneum with retention of keratohyalin granules was considered diagnostic of granular parakeratosis. Results: Eighteen of 363,343 specimens (0.005%) were diagnosed with granular parakeratosis. The diagnosis was confirmed by re-review of specimens. All lesions were located in the axillae. All patients were adults; most were women. In only one instance was the correct clinical diagnosis of granular parakeratosis submitted with a biopsy requisition of it. Granular parakeratosis is rare, if its incidence among biopsy specimens is representative of its true prevalence. The failure to include granular parakeratosis on biopsy requisition forms of granular parakeratosis specimens indicates that dermatologists are not familiar with it. Variations of the histopathology of the 18 cases occurred but did not correlate with the clinical impressions included on biopsy requisition forms.展开更多
Background: Nevus comedonicus (NC) is rarely associated with the histopathologic pattern of follicular epidermolytic hyperkeratosis (EHK).We found eight cases reported.In one case, the condition was transmitted to the...Background: Nevus comedonicus (NC) is rarely associated with the histopathologic pattern of follicular epidermolytic hyperkeratosis (EHK).We found eight cases reported.In one case, the condition was transmitted to the offspring in the form of generalized EHK.Methods: We describe a case of linear NC with EHK in a 46-year-old woman.Results: Histopathologic examination revealed the typical features of NC.Additionally, the follicular epithelial walls showed EHK with characteristic perinuclear vacuolization in the stratum spinosum and stratum granulosum and large, irregular keratohyalin granules in the granular cell layer.Conclusions: The clinical and histopathologic features of this case are consistent with a diagnosis of linear NC with EHK.Lesions of NC suspected by clinical exam should be examined microscopically to look for features of EHK.If present, patients should be educated about the risk, albeit rare, of passing on a more severe form of the disorder to subsequent generations.展开更多
Granular parakeratosis was originally described as a dermatosis confined to the axillae that histopathologically shows characteristic findings in the cornifie d layer consisting of parakeratotic corneocytes housing ke...Granular parakeratosis was originally described as a dermatosis confined to the axillae that histopathologically shows characteristic findings in the cornifie d layer consisting of parakeratotic corneocytes housing keratohyaline granules. Since the original description of this entity, non-intertriginous examples and even incidental foci of granular parakeratotic corneocytes in association with o ther dermatoses have been recognized. This report details the findings of a prev iously unreported entity that we are naming granular parakeratotic acanthoma, wh ich is fundamentally akin to acantholytic dyskeratotic acanthoma and epidermolyt ic acanthoma (ie, a solitary keratosis that histopathologically displays feature s indicated in its name).展开更多
文摘Background: Our previous study showed that large keratohyaline granules (KHG) in molluscum contagiosum that stained with haematoxylin also reacted with anti- Ted- H- 1 monoclonal antibody (mAb), but not with antifilaggrin mAb or antiloricrin polyclonal antibody (pAb). This finding indicated that the Ted- H- 1 antigenic protein is a haematoxylin- stainable protein in KHG. Objectives: To clarify the identity of the major component protein of the large KHG in solar keratosis, another disorder in which large KHG are observed. Methods An enzyme immunohistochemical study was performed using antifilaggrin mAb, anti- Ted- H- 1 mAb and antiloricrin pAb. Immunofluorescent double staining and immunoelectron microscopic analyses were performed using anti- Ted- H- 1 mAb and antiloricrin pAb. Results: Antifilaggrin mAb, anti- Ted- H- 1 mAb and antiloricrin pAb reacted with normal KHG in nonlesional skin of solar keratosis, while only anti- Ted- H- 1 mAb reacted with the large KHG in the lesions of solar keratosis. Antifilaggrin mAb did not react with large KHG. Antiloricrin pAb reacted with the cell membrane of the stratum granulosum, but not with large KHG. Conclusions: These findings suggest that the haematoxylin- stainable protein in the large KHG would be a Ted- H- 1 antigen protein which was neither filaggrin nor loricrin.
文摘Background: Granular parakeratosis (originally termed axillary granular parakeratosis) is an idiopathic, benign, nondisabling cutaneous disease that manifests with intertriginous erythematous, brown or red, scaly or keratotic papules and plaques. It presents in all age groups and has no established clinical associations. Objectives: We wanted to assess the following: (1) the incidence of granular parakeratosis in biopsy specimens; (2) the differential diagnosis submitted with specimens requisition of granular parakeratosis; and (3) variations in its histopathology. Methods: Between July 1, 1999 and December 31, 2003, 363,343 specimens were submitted to The Ackerman Institute of Dermatopathology in New York. Acomputersearch was done of these specimen records and cases diagnosed with granular parakeratosis were reviewed. A thickened stratum corneum with retention of keratohyalin granules was considered diagnostic of granular parakeratosis. Results: Eighteen of 363,343 specimens (0.005%) were diagnosed with granular parakeratosis. The diagnosis was confirmed by re-review of specimens. All lesions were located in the axillae. All patients were adults; most were women. In only one instance was the correct clinical diagnosis of granular parakeratosis submitted with a biopsy requisition of it. Granular parakeratosis is rare, if its incidence among biopsy specimens is representative of its true prevalence. The failure to include granular parakeratosis on biopsy requisition forms of granular parakeratosis specimens indicates that dermatologists are not familiar with it. Variations of the histopathology of the 18 cases occurred but did not correlate with the clinical impressions included on biopsy requisition forms.
文摘Background: Nevus comedonicus (NC) is rarely associated with the histopathologic pattern of follicular epidermolytic hyperkeratosis (EHK).We found eight cases reported.In one case, the condition was transmitted to the offspring in the form of generalized EHK.Methods: We describe a case of linear NC with EHK in a 46-year-old woman.Results: Histopathologic examination revealed the typical features of NC.Additionally, the follicular epithelial walls showed EHK with characteristic perinuclear vacuolization in the stratum spinosum and stratum granulosum and large, irregular keratohyalin granules in the granular cell layer.Conclusions: The clinical and histopathologic features of this case are consistent with a diagnosis of linear NC with EHK.Lesions of NC suspected by clinical exam should be examined microscopically to look for features of EHK.If present, patients should be educated about the risk, albeit rare, of passing on a more severe form of the disorder to subsequent generations.
文摘Granular parakeratosis was originally described as a dermatosis confined to the axillae that histopathologically shows characteristic findings in the cornifie d layer consisting of parakeratotic corneocytes housing keratohyaline granules. Since the original description of this entity, non-intertriginous examples and even incidental foci of granular parakeratotic corneocytes in association with o ther dermatoses have been recognized. This report details the findings of a prev iously unreported entity that we are naming granular parakeratotic acanthoma, wh ich is fundamentally akin to acantholytic dyskeratotic acanthoma and epidermolyt ic acanthoma (ie, a solitary keratosis that histopathologically displays feature s indicated in its name).
