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Giang J, Mooyaart AL, Martens-de Kemp SR, Jaspars L, Wakkee M, Eijken E, Voogt W, Dinjens WNM, Damman J. Hedgehog pathway mutations are involved in the pathogenesis of plaque-type "trichoblastoma": A report of two cases. J Cutan Pathol 2023. [PMID: 36607280 DOI: 10.1111/cup.14389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 11/21/2022] [Accepted: 01/03/2023] [Indexed: 01/07/2023]
Abstract
We present two cases of plaque-type trichoblastoma with atypical foci. A rare variant of trichoblastoma is the plaque variant, which is characterized by poor circumscription and locally infiltrative growth pattern. These lesions mostly require multiple stages of Mohs micrographic surgery. Debate still exists whether this variant should be considered as a benign entity or as "low-grade" malignant counterpart of trichoblastoma. In this report we describe two cases of plaque-type trichoblastoma with atypical foci, which harbored somatic mutations in the Hedgehog pathway, thus should be acknowledged as intermediate malignancies. In addition, extensive molecular workup of both the trichoblastic and atypical component in sequential lesions in the same patient was performed.
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Affiliation(s)
- Jenny Giang
- Department of Pathology, Maasstad Hospital, Rotterdam, The Netherlands
| | - Antien L Mooyaart
- Department of Pathology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | | | - Lies Jaspars
- Department of Pathology, Vrije Universiteit Medical Center, Amsterdam, The Netherlands
| | - Marlies Wakkee
- Department of Dermatology, Erasmus MC, University Medical Center Cancer Institute, Rotterdam, The Netherlands
| | - Erik Eijken
- Laboratory for Pathology East Netherlands (LabPON), Hengelo, The Netherlands
| | - Walter Voogt
- Department of Pathology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Winand N M Dinjens
- Department of Pathology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Jeffrey Damman
- Department of Pathology, Erasmus University Medical Center, Rotterdam, The Netherlands
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Sturm B, Creytens D, Smits J, Ooms AHAG, Eijken E, Kurpershoek E, Küsters-Vandevelde HVN, Wauters C, Blokx WAM, van der Laak JAWM. Computer-Aided Assessment of Melanocytic Lesions by Means of a Mitosis Algorithm. Diagnostics (Basel) 2022; 12:diagnostics12020436. [PMID: 35204526 PMCID: PMC8871065 DOI: 10.3390/diagnostics12020436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/31/2021] [Accepted: 01/14/2022] [Indexed: 11/16/2022] Open
Abstract
An increasing number of pathology laboratories are now fully digitised, using whole slide imaging (WSI) for routine diagnostics. WSI paves the road to use artificial intelligence (AI) that will play an increasing role in computer-aided diagnosis (CAD). In melanocytic skin lesions, the presence of a dermal mitosis may be an important clue for an intermediate or a malignant lesion and may indicate worse prognosis. In this study a mitosis algorithm primarily developed for breast carcinoma is applied to melanocytic skin lesions. This study aimed to assess whether the algorithm could be used in diagnosing melanocytic lesions, and to study the added value in diagnosing melanocytic lesions in a practical setting. WSI’s of a set of hematoxylin and eosin (H&E) stained slides of 99 melanocytic lesions (35 nevi, 4 intermediate melanocytic lesions, and 60 malignant melanomas, including 10 nevoid melanomas), for which a consensus diagnosis was reached by three academic pathologists, were subjected to a mitosis algorithm based on AI. Two academic and six general pathologists specialized in dermatopathology examined the WSI cases two times, first without mitosis annotations and after a washout period of at least 2 months with mitosis annotations based on the algorithm. The algorithm indicated true mitosis in lesional cells, i.e., melanocytes, and non-lesional cells, i.e., mainly keratinocytes and inflammatory cells. A high number of false positive mitosis was indicated as well, comprising melanin pigment, sebaceous glands nuclei, and spindle cell nuclei such as stromal cells and neuroid differentiated melanocytes. All but one pathologist reported more often a dermal mitosis with the mitosis algorithm, which on a regular basis, was incorrectly attributed to mitoses from mainly inflammatory cells. The overall concordance of the pathologists with the consensus diagnosis for all cases excluding nevoid melanoma (n = 89) appeared to be comparable with and without the use of AI (89% vs. 90%). However, the concordance increased by using AI in nevoid melanoma cases (n = 10) (75% vs. 68%). This study showed that in general cases, pathologists perform similarly with the aid of a mitosis algorithm developed primarily for breast cancer. In nevoid melanoma cases, pathologists perform better with the algorithm. From this study, it can be learned that pathologists need to be aware of potential pitfalls using CAD on H&E slides, e.g., misinterpreting dermal mitoses in non-melanotic cells.
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Affiliation(s)
- Bart Sturm
- Department of Pathology, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands;
- Pathan B.V., 3045 PM Rotterdam, The Netherlands; (J.S.); (A.H.A.G.O.); (E.K.)
| | - David Creytens
- Department of Pathology, Ghent University Hospital, 9000 Ghent, Belgium;
| | - Jan Smits
- Pathan B.V., 3045 PM Rotterdam, The Netherlands; (J.S.); (A.H.A.G.O.); (E.K.)
| | | | - Erik Eijken
- Laboratory for Pathology Oost Nederland (LabPON), 7550 AM Hengelo, The Netherlands;
| | - Eline Kurpershoek
- Pathan B.V., 3045 PM Rotterdam, The Netherlands; (J.S.); (A.H.A.G.O.); (E.K.)
| | | | - Carla Wauters
- Department of Pathology, Canisius Wilhelmina Hospital, 6500 GS Nijmegen, The Netherlands; (H.V.N.K.-V.); (C.W.)
| | - Willeke A. M. Blokx
- Division Laboratories, Pharmacy and Biomedical Genetics, University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands;
| | - Jeroen A. W. M. van der Laak
- Department of Pathology, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands;
- Center for Medical Image Science and Visualization, Linköping University, 581 83 Linköping, Sweden
- Correspondence: ; Tel.: +31-638-814-869
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Sturm B, Creytens D, Cook MG, Smits J, van Dijk MCRF, Eijken E, Kurpershoek E, Küsters-Vandevelde HVN, Ooms AHAG, Wauters C, Blokx WAM, van der Laak JAWM. Validation of Whole-slide Digitally Imaged Melanocytic Lesions: Does Z-Stack Scanning Improve Diagnostic Accuracy? J Pathol Inform 2019; 10:6. [PMID: 30972225 PMCID: PMC6415522 DOI: 10.4103/jpi.jpi_46_18] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 12/17/2018] [Indexed: 01/21/2023] Open
Abstract
Background Accurate diagnosis of melanocytic lesions is challenging, even for expert pathologists. Nowadays, whole-slide imaging (WSI) is used for routine clinical pathology diagnosis in several laboratories. One of the limitations of WSI, as it is most often used, is the lack of a multiplanar focusing option. In this study, we aim to establish the diagnostic accuracy of WSI for melanocytic lesions and investigate the potential accuracy increase of z-stack scanning. Z-stack enables pathologists to use a software focus adjustment, comparable to the fine-focus knob of a conventional light microscope. Materials and Methods Melanocytic lesions (n = 102) were selected from our pathology archives: 35 nevi, 5 spitzoid tumors of unknown malignant potential, and 62 malignant melanomas, including 10 nevoid melanomas. All slides were scanned at a magnification comparable to use of a ×40 objective, in z-stack mode. A ground truth diagnosis was established on the glass slides by four academic dermatopathologists with a special interest in the diagnosis of melanoma. Six nonacademic surgical pathologists subspecialized in dermatopathology examined the cases by WSI. Results An expert consensus diagnosis was achieved in 99 (97%) of cases. Concordance rates between surgical pathologists and the ground truth varied between 75% and 90%, excluding nevoid melanoma cases. Concordance rates of nevoid melanoma varied between 10% and 80%. Pathologists used the software focusing option in 7%-28% of cases, which in 1 case of nevoid melanoma resulted in correcting a misdiagnosis after finding a dermal mitosis. Conclusion Diagnostic accuracy of melanocytic lesions based on glass slides and WSI is comparable with previous publications. A large variability in diagnostic accuracy of nevoid melanoma does exist. Our results show that z-stack scanning, in general, does not increase the diagnostic accuracy of melanocytic.
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Affiliation(s)
- Bart Sturm
- Department of Pathology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - David Creytens
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
| | - Martin G Cook
- Department of Histopathology, Royal Surrey County Hospital, Guildford, United Kingdom
| | - Jan Smits
- Pathan B.V., Rotterdam, The Netherlands
| | | | - Erik Eijken
- Laboratory for Pathology East Netherlands (LabPON), Hengelo, The Netherlands
| | | | | | | | - Carla Wauters
- Department of Pathology, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
| | - Willeke A M Blokx
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
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Abstract
A 28-year-old woman was referred to our hospital because of abdominal pain, weight loss and a palpable intra-abdominal mass. A CT scan revealed a tumor with a diameter of 7 cm with sharp margins, intra-tumoral fatty components and enhancing soft tissue. After initial workup, which suggested an inflammatory myofibroblastic tumor (IMT), she underwent laparotomy with complete resection. Pathological examination indeed revealed IMT. IMT is a rare benign neoplasm and has been described in nearly the entire body. It presents with nonspecific symptoms. The therapy of abdominal IMT consists of radical surgery because of high local recurrence rates. In this case report clinical, surgical, radiological and histological features with a review of the relevant literature are described.
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Affiliation(s)
| | - Menno H Raber
- Department of Surgery, Laboratorium Pathologie Oost Nederland, Hengelo, The Netherlands
| | - Richard Oosterhof-Berktas
- Department of Radiology of Medisch Spectrum Twente, Enschede, Laboratorium Pathologie Oost Nederland, Hengelo, The Netherlands
| | - Erik Eijken
- Department of Pathology, Laboratorium Pathologie Oost Nederland, Hengelo, The Netherlands
| | - Joost M Klaase
- Department of Surgery, Laboratorium Pathologie Oost Nederland, Hengelo, The Netherlands
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Nijland M, van Zanten RAA, Eijken E, Veneman TF. [Melena associated with a Brunner's adenoma]. Ned Tijdschr Geneeskd 2008; 152:1283-1286. [PMID: 18590064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A 68-year-old woman presented at the Casualty Department due to collapse, anaemia, fatigue and progressive dyspnoea. She suffered from melena, indicative of a haemorrhage in the upper gastrointestinal tract. Gastroduodenoscopy revealed the presence of a polyp in the duodenum, which was endoscopically resected. Pathological investigation demonstrated that the polyp was a Brunner's adenoma, i.e. a circumscript benign submucosal nodular hyperplasia of the Brunner's glands.
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Affiliation(s)
- M Nijland
- Afd. Interne Geneeskunde, Twenteborg Ziekenhuis, Postbus 7600, 7600 SZ Almelo
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