American Journal of Dermatopathology最新文献

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Gene Fusion-Driven Cutaneous Adnexal Neoplasms: An Updated Review Emphasizing Molecular Characteristics. 基因融合驱动的皮肤附件肿瘤:强调分子特征的最新综述。
IF 1.1 4区 医学
American Journal of Dermatopathology Pub Date : 2025-06-01 Epub Date: 2025-02-06 DOI: 10.1097/DAD.0000000000002933
Gerardo Cazzato, Maged Daruish, Francesco Fortarezza, Anna Colagrande, Andrea Marzullo, Giuseppe Ingravallo, Angelo Paolo Dei Tos, Richard K Yang, Woo Cheal Cho
{"title":"Gene Fusion-Driven Cutaneous Adnexal Neoplasms: An Updated Review Emphasizing Molecular Characteristics.","authors":"Gerardo Cazzato, Maged Daruish, Francesco Fortarezza, Anna Colagrande, Andrea Marzullo, Giuseppe Ingravallo, Angelo Paolo Dei Tos, Richard K Yang, Woo Cheal Cho","doi":"10.1097/DAD.0000000000002933","DOIUrl":"10.1097/DAD.0000000000002933","url":null,"abstract":"<p><strong>Abstract: </strong>Gene rearrangements or fusions have emerged as critical oncogenic drivers in various cutaneous adnexal neoplasms. This review offers a comprehensive overview of both established and recently identified molecular alterations, with a specific focus on gene fusions. Key alterations discussed include YAP1 rearrangements, CRTC1::MAML2 fusions, BRD3 rearrangements, MYB::NFIB fusions, ETV6::NTRK3 fusions, and PLAG1 rearrangements, alongside rarer fusion transcripts, such as MEF2C::SS18 , FOXK1::GRHL1/2 , GPS2::GRHL , and RARA::NPEPPS . The article highlights the significance of these genetic changes in tumor biology and their potential therapeutic implications for locally advanced and metastatic skin adnexal tumors. It also addresses diagnostic challenges and molecular distinctions, providing updated insights into adnexal tumors driven by these gene fusions.</p>","PeriodicalId":50967,"journal":{"name":"American Journal of Dermatopathology","volume":" ","pages":"453-461"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143257206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
34βE12 is the Most Reliable Marker for Keratin-Derived Cutaneous Amyloid: A Comparative Study. 34βE12是角蛋白来源的皮肤淀粉样蛋白最可靠的标志物:一项比较研究
IF 1.1 4区 医学
American Journal of Dermatopathology Pub Date : 2025-06-01 Epub Date: 2025-02-19 DOI: 10.1097/DAD.0000000000002942
Maged Daruish, Ghada Al-Sharbatee, Corrado D'Arrigo, Saleem Taibjee
{"title":"34βE12 is the Most Reliable Marker for Keratin-Derived Cutaneous Amyloid: A Comparative Study.","authors":"Maged Daruish, Ghada Al-Sharbatee, Corrado D'Arrigo, Saleem Taibjee","doi":"10.1097/DAD.0000000000002942","DOIUrl":"10.1097/DAD.0000000000002942","url":null,"abstract":"<p><strong>Abstract: </strong>Congo red (CR) remains the most commonly used stain by pathologists to detect amyloid deposition. CR, however, has limitations including variable sensitivity with potential of false negative results. We investigated the staining intensity of CR in comparison to commercially available cytokeratin immunohistochemical markers in a series of primary cutaneous amyloidosis originating from keratin filaments.</p>","PeriodicalId":50967,"journal":{"name":"American Journal of Dermatopathology","volume":" ","pages":"439-441"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Solitary Fibrofolliculoma on the Back With a Nevus. 背部单发纤维滤泡瘤伴痣。
IF 1.1 4区 医学
American Journal of Dermatopathology Pub Date : 2025-06-01 Epub Date: 2025-04-22 DOI: 10.1097/DAD.0000000000002980
Sanah Basrai, David S Cassarino
{"title":"A Solitary Fibrofolliculoma on the Back With a Nevus.","authors":"Sanah Basrai, David S Cassarino","doi":"10.1097/DAD.0000000000002980","DOIUrl":"10.1097/DAD.0000000000002980","url":null,"abstract":"<p><strong>Abstract: </strong>Multiple fibrofolliculomas (FFs) are a major feature for the rare autosomal dominant disorder Birt-Hogg-Dubé syndrome. Individuals with this condition carry a mutation in the FLCN (folliculin) gene that increases their risk for pneumothorax and renal cell carcinoma. Solitary FFs do not have a genetic component to suggest BHD syndrome. However, they are rare, benign tumors with epithelial and connective tissue features, primarily reported on the face, head, and neck. Here, we present the case of 46-year-old woman with a solitary FF on the back coexisting with a nevus. Histological analysis confirmed the diagnosis of FF, characterized by an irregular follicular structure with epithelial cords and an associated fibromyxoid stroma. This case contributes to the limited reports of solitary FFs, highlighting the rare occurrence and unique association with a nevus.</p>","PeriodicalId":50967,"journal":{"name":"American Journal of Dermatopathology","volume":" ","pages":"e68-e70"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144006821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Focal Oral Elastosis: Case Series, Proposed Nomenclature, and Literature Review. 局灶性口腔弹性增生:病例系列、拟议的命名法和文献回顾。
IF 1.1 4区 医学
American Journal of Dermatopathology Pub Date : 2025-06-01 Epub Date: 2025-02-19 DOI: 10.1097/DAD.0000000000002920
Lama Alabdulaaly, Dahee Chung, Sook-Bin Woo
{"title":"Focal Oral Elastosis: Case Series, Proposed Nomenclature, and Literature Review.","authors":"Lama Alabdulaaly, Dahee Chung, Sook-Bin Woo","doi":"10.1097/DAD.0000000000002920","DOIUrl":"10.1097/DAD.0000000000002920","url":null,"abstract":"<p><strong>Abstract: </strong>Late-onset focal dermal elastosis is an uncommon elastic disorder seen in older individuals and biopsies demonstrate an increase in elastic fibers. Elastosis of the oral cavity is reported uncommonly. The aim of this study is to describe oral biopsies with similar histopathologic features to late-onset focal dermal elastosis and to introduce the term \"focal oral elastosis.\" We included oral biopsies that showed increased elastic fibers confirmed by Verhoeff-van Gieson histochemical stain. We identified 6 oral biopsies with prominent elastosis. There were 4 men, and the median age was 64.5 years. Elastosis was present in 5 nodular lesions and 1 papule. Lesions occurred on the gingiva (33.3%), palatal mucosa (33.3%), buccal mucosa (16.7%), and upper lip (16.7%). Deposition of amorphic bluish/amphophilic material in the subepithelial areas was seen in all cases confirmed with the Verhoeff-van Gieson stain. Our case series demonstrates the presence of elastic fibers in reactive lesions such as oral fibromas.</p>","PeriodicalId":50967,"journal":{"name":"American Journal of Dermatopathology","volume":" ","pages":"442-447"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Expression of p16 in Hypertrophic Lichen Planus. p16在增生性扁平地衣中的表达。
IF 1.1 4区 医学
American Journal of Dermatopathology Pub Date : 2025-06-01 Epub Date: 2025-02-06 DOI: 10.1097/DAD.0000000000002940
Katie R Xu, Kord Honda, Bethany R Rohr
{"title":"Expression of p16 in Hypertrophic Lichen Planus.","authors":"Katie R Xu, Kord Honda, Bethany R Rohr","doi":"10.1097/DAD.0000000000002940","DOIUrl":"10.1097/DAD.0000000000002940","url":null,"abstract":"<p><strong>Background: </strong>Although cutaneous squamous cell carcinoma (SCC) arising from lichen planus is rare, hypertrophic lichen planus (HLP) accounts for most of these malignant transformations. Although the mechanism of malignant pathogenesis remains unknown, reports of similar premalignant conditions suggest a potential role of tumor suppressor p16. This is the first study to our knowledge to examine p16 expression in HLP in comparison to cutaneous invasive SCC and normal skin and its implications for malignant transformation.</p><p><strong>Methods: </strong>p16 immunohistochemistry of HLP (n = 34) was performed alongside location-matched well-differentiated SCC (WDSCC) and normal skin. Percentage of positive cells, nuclear and cytoplasmic staining intensity, and staining distribution patterns were reviewed by 2 Board-certified dermatopathologists.</p><p><strong>Results: </strong>HLP and WDSCC both showed an increased percentage of positive cells compared with normal skin ( P < 0.001). Cytoplasmic p16 was overexpressed in HLP compared with WDSCC ( P < 0.05). Most cases of HLP and WDSCC demonstrated stronger basal and suprabasal keratinocyte staining with weaker superficial staining. In WDSCC, a predominant pattern of focal cytoplasmic margination of staining along the cellular periphery was observed.</p><p><strong>Conclusions: </strong>Our finding of cytoplasmic p16 overexpression in HLP suggests a potential mechanism of p16-mediated cell cycle dysregulation seen in other premalignant conditions. p16 overexpression seems to be a possible contributor in the malignant transformation of HLP to SCC.</p>","PeriodicalId":50967,"journal":{"name":"American Journal of Dermatopathology","volume":" ","pages":"448-452"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143257185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multicentric Reticulohistiocytosis-Histopathologic Spectrum in Indian Patients. 多中心网状组织细胞增多症——印度患者的组织病理谱。
IF 1.1 4区 医学
American Journal of Dermatopathology Pub Date : 2025-06-01 Epub Date: 2025-03-19 DOI: 10.1097/DAD.0000000000002944
Lavanya Murugesu, Rajalakshmi Tirumalae
{"title":"Multicentric Reticulohistiocytosis-Histopathologic Spectrum in Indian Patients.","authors":"Lavanya Murugesu, Rajalakshmi Tirumalae","doi":"10.1097/DAD.0000000000002944","DOIUrl":"10.1097/DAD.0000000000002944","url":null,"abstract":"<p><strong>Abstract: </strong>Multicentric reticulohistiocytosis (MRH) is a rare histiocytosis, characterized by polyarthritis and multiple papulonodular lesions in the skin, mucosa, and visceral organs. It has a robust association with autoimmune diseases and malignancies. We studied histopathological features of 4 cases of MRH over a period of 11 years (2012-2023). The mean age was 48 years with no gender predilection. All patients had papulonodular skin lesions distributed over dorsum of finger, scalp, pinna, hands, elbows, and back. Associated conditions include arthritis in 2 cases and malignancy in 2 cases. All biopsies showed sheets of histiocytes, the morphology of which varied from having dense eosinophilic glassy appearing cytoplasm to abundant vacuolated cytoplasm. Good clinicopathologic correlation is necessary to make a diagnosis; however, it is not always possible to establish diagnosis at the time of biopsy. Follow-up diagnosis of malignancy led to the diagnosis in 2 cases. This small, yet insightful, case series emphasizes the need for good clinicopathologic correlation regardless of histiocyte morphology when MRH is suspected.</p>","PeriodicalId":50967,"journal":{"name":"American Journal of Dermatopathology","volume":" ","pages":"428-432"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143659710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Utilization of ChatGPT to Simplify Complex Dermatopathology Reports Into Patient-Friendly Language. 利用ChatGPT将复杂的皮肤病理报告简化为患者友好的语言。
IF 1.1 4区 医学
American Journal of Dermatopathology Pub Date : 2025-06-01 Epub Date: 2024-11-21 DOI: 10.1097/DAD.0000000000002868
Alyssa Breneman, Megan H Trager, Emily R Gordon, Apoorva Mehta, Sameera Husain, Alejandro A Gru, Faramarz H Samie
{"title":"Utilization of ChatGPT to Simplify Complex Dermatopathology Reports Into Patient-Friendly Language.","authors":"Alyssa Breneman, Megan H Trager, Emily R Gordon, Apoorva Mehta, Sameera Husain, Alejandro A Gru, Faramarz H Samie","doi":"10.1097/DAD.0000000000002868","DOIUrl":"10.1097/DAD.0000000000002868","url":null,"abstract":"","PeriodicalId":50967,"journal":{"name":"American Journal of Dermatopathology","volume":" ","pages":"498-500"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unusual Nodule on the Left Leg of an Elderly Woman-A Case Report: Challenge. 老年妇女左腿上的异常结节--病例报告:挑战。
IF 1.1 4区 医学
American Journal of Dermatopathology Pub Date : 2025-06-01 Epub Date: 2025-03-26 DOI: 10.1097/DAD.0000000000002961
Gerardo Cazzato, Giuseppe Ingravallo, Paola Vitiello, Francesca Pagliuca, Renato Franco, Andrea Ronchi
{"title":"Unusual Nodule on the Left Leg of an Elderly Woman-A Case Report: Challenge.","authors":"Gerardo Cazzato, Giuseppe Ingravallo, Paola Vitiello, Francesca Pagliuca, Renato Franco, Andrea Ronchi","doi":"10.1097/DAD.0000000000002961","DOIUrl":"10.1097/DAD.0000000000002961","url":null,"abstract":"<p><strong>Abstract: </strong>We present the case of a 71-year-old woman with no significant medical history who developed a nodular, ulcerated lesion on her left leg, alongside bruise-like lesions on her extremities. Histologic examination revealed basal cell carcinoma with adenoid-cystic features colliding with blastic plasmacytoid dendritic cell neoplasm (BPDCN), a rare and aggressive hematologic malignancy. Immunohistochemical analysis confirmed BPDCN, with markers such as CD123, CD4, CD56, and TCL1, and a high proliferation index (Ki67 >90%). This represents the first reported case of a collision lesion comprising adenoid-cystic basal cell carcinoma and BPDCN. The findings highlight the need for comprehensive histopathologic evaluation in atypical cases to achieve an accurate diagnosis.</p>","PeriodicalId":50967,"journal":{"name":"American Journal of Dermatopathology","volume":" ","pages":"e64-e66"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143765733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diagnostic Utility of Preferentially Expressed Antigen in Melanoma (PRAME) and p16 Immunohistochemistry in Distinguishing Genital Melanomas From Benign Melanocytic Proliferations. 黑色素瘤中优先表达抗原(PRAME)和p16免疫组织化学在区分生殖器黑色素瘤和良性黑色素细胞增生中的诊断价值。
IF 1.1 4区 医学
American Journal of Dermatopathology Pub Date : 2025-06-01 Epub Date: 2025-04-22 DOI: 10.1097/DAD.0000000000002977
Petro Vavrukh, Robert E LeBlanc, Shaofeng Yan
{"title":"Diagnostic Utility of Preferentially Expressed Antigen in Melanoma (PRAME) and p16 Immunohistochemistry in Distinguishing Genital Melanomas From Benign Melanocytic Proliferations.","authors":"Petro Vavrukh, Robert E LeBlanc, Shaofeng Yan","doi":"10.1097/DAD.0000000000002977","DOIUrl":"10.1097/DAD.0000000000002977","url":null,"abstract":"<p><strong>Abstract: </strong>Preferentially expressed antigen in melanoma (PRAME) expression is valuable for distinguishing malignant from benign melanocytic proliferations, and p16 has also been shown to aid in this distinction. However, data on the utility of these two immunohistochemistry stains in genital melanocytic lesions are limited. We retrospectively analyzed 56 genital melanocytic lesions, including 41 benign lesions and 15 melanomas (6 in situ and 9 invasive) with PRAME and p16 immunohistochemistry. All melanomas exhibited extensive PRAME positivity: 93.3% (14 of 15) had a 4+ score (>75% positive cells) and 1 had a 3+ score (51%-75% positive cells). In contrast, 87.8% (36 of 41) of benign lesions were PRAME negative, and none scored higher than 2+ (26%-50% positive cells). Using a 4+ cutoff, PRAME demonstrated a sensitivity of 93.3% and specificity of 100%. Lowering the cutoff to 3+ increased sensitivity to 100%. Complete or partial loss of p16 was observed in 60.0% (9 of 15) of melanomas but not in any benign lesions (0 of 41), resulting in a sensitivity of 60.0% and specificity of 100%. Our findings indicate that PRAME immunohistochemistry is highly sensitive and specific for genital melanoma. Loss of p16 expression, although not sensitive, is highly specific for genital melanomas and is, therefore, useful in challenging genital melanocytic lesions.</p>","PeriodicalId":50967,"journal":{"name":"American Journal of Dermatopathology","volume":" ","pages":"462-467"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143991077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Double Trouble With Zoster: Report of Lichenoid and Granulomatous Dermatitis Following Reactivated Varicella Zoster Infection and Review of Literature. 带状疱疹的双重困扰:水痘带状疱疹感染后的地衣样皮炎和肉芽肿性皮炎报告及文献复习。
IF 1.1 4区 医学
American Journal of Dermatopathology Pub Date : 2025-06-01 Epub Date: 2025-04-22 DOI: 10.1097/DAD.0000000000002971
Mahroo Tajalli, Amit Singal, Jennifer Kane, Leslie Robinson-Bostom, Christopher DiMarco
{"title":"Double Trouble With Zoster: Report of Lichenoid and Granulomatous Dermatitis Following Reactivated Varicella Zoster Infection and Review of Literature.","authors":"Mahroo Tajalli, Amit Singal, Jennifer Kane, Leslie Robinson-Bostom, Christopher DiMarco","doi":"10.1097/DAD.0000000000002971","DOIUrl":"10.1097/DAD.0000000000002971","url":null,"abstract":"<p><strong>Abstract: </strong>Lichenoid and granulomatous dermatitis is an uncommon cutaneous reaction pattern, which combines features of lichenoid and granulomatous inflammatory patterns. It can represent an idiopathic lichenoid eruption or be associated with a variety of disorders including drug reactions, hepatobiliary disorders, rheumatoid arthritis, infections, tattoo reactions, pigmented purpuric dermatosis, lichenoid contact dermatitis, and cutaneous T-cell lymphoma. Clinical manifestations include pruritic, pink to violaceous, macules, papules, plaques, or nodules, with or without scaling, usually distributed on the trunk and extremities. In this article, we present a case of a 70-year-old woman with a history of rheumatoid arthritis and diabetes mellitus who developed a pruritic rash within the exact distribution of a preceding varicella zoster infection. Histopathology showed a dense lymphocytic lichenoid interface dermatitis with superficial and deep perivascular lymphocytic and granulomatous inflammation, consistent with the diagnosis of lichenoid and granulomatous dermatitis. The patient was started on a topical steroid and at 3-month follow up, demonstrated significant improvement of the skin lesions.</p>","PeriodicalId":50967,"journal":{"name":"American Journal of Dermatopathology","volume":" ","pages":"487-490"},"PeriodicalIF":1.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144060086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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