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Torre-Castro J, Ríos-Viñuela E, Balaguer-Franch I, Díaz de Lezcano I, Aguado-García Á, Nájera L, Suárez D, Requena L. Perineural Infiltration: A Comprehensive Review of Diagnostic, Prognostic, and Therapeutic Implications. Am J Dermatopathol 2024; 46:271-286. [PMID: 38457673 DOI: 10.1097/dad.0000000000002667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/10/2024]
Abstract
ABSTRACT Perineural infiltration refers to a neoplastic cell involvement in, around, and through the nerves. It is considered as one of the neoplastic dissemination pathways. Thus, its identification is crucial to establish the prognosis of some malignant skin neoplasms, such as squamous cell carcinoma, and explains the locally aggressive behavior of cutaneous neoplasms, such as microcystic adnexal carcinoma. We have conducted a review of malignant and benign skin tumors in which perineural infiltration has been described, and we also discuss some histopathological findings that may simulate perineural infiltration.
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Affiliation(s)
- Juan Torre-Castro
- Department of Dermatology, Fundación Jiménez Díaz, Universidad Autónoma, Madrid, Spain
| | - Elisa Ríos-Viñuela
- Department of Dermatology, Instituto Valenciano de Oncología, Escuela de Doctorado Universidad Católica de Valencia, Valencia, Spain
| | | | | | | | - Laura Nájera
- Department of Pathology, Puerta de Hierro University Hospital, Universidad Autónoma, Majadahonda, Madrid, Spain
| | - Dolores Suárez
- Department of Pathology, Puerta de Hierro University Hospital, Universidad Autónoma, Majadahonda, Madrid, Spain
| | - Luis Requena
- Department of Dermatology, Fundación Jiménez Díaz, Universidad Autónoma, Madrid, Spain
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Bahmad HF, Gogola S, Rejzer M, Stoyanov K, Gomez AS, Valencia AK, Cummings A, Skerry T, Alloush F, Aljamal AA, Deb A, Alghamdi S, Poppiti R. Unraveling the Mysteries of Perineural Invasion in Benign and Malignant Conditions. Curr Oncol 2023; 30:8948-8972. [PMID: 37887547 PMCID: PMC10605475 DOI: 10.3390/curroncol30100647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 09/27/2023] [Accepted: 09/29/2023] [Indexed: 10/28/2023] Open
Abstract
Perineural invasion (PNI) is defined as the dissemination of neoplastic cells within the perineural space. PNI can be a strong indicator of malignancy and is linked to poor prognosis and adverse outcomes in various malignant neoplasms; nevertheless, it can also be seen in benign pathologic conditions. In this review article, we discuss various signaling pathways and neurotrophic factors implicated in the development and progression of PNI. We also describe the methodology, benefits, and limitations of different in vitro, ex vivo, and in vivo models of PNI. The spectrum of presentation for PNI can range from diffuse spread within large nerves ("named" nerves) all the way through localized spread into unnamed microscopic nerves. Therefore, the clinical significance of PNI is related to its extent rather than its mere presence or absence. In this article, we discuss the guidelines for the identification and quantification of PNI in different malignant neoplasms based on the College of American Pathologists (CAP) and World Health Organization (WHO) recommendations. We also describe benign pathologic conditions and neoplasms demonstrating PNI and potential mimics of PNI. Finally, we explore avenues for the future development of targeted therapy options via modulation of signaling pathways involved in PNI.
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Affiliation(s)
- Hisham F. Bahmad
- The Arkadi M. Rywlin M.D. Department of Pathology and Laboratory Medicine, Mount Sinai Medical Center, Miami Beach, FL 33140, USA; (F.A.); (A.D.); (S.A.); (R.P.)
| | - Samantha Gogola
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA; (S.G.); (M.R.); (K.S.); (A.S.G.); (A.-K.V.); (A.C.); (T.S.)
| | - Michael Rejzer
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA; (S.G.); (M.R.); (K.S.); (A.S.G.); (A.-K.V.); (A.C.); (T.S.)
| | - Kalin Stoyanov
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA; (S.G.); (M.R.); (K.S.); (A.S.G.); (A.-K.V.); (A.C.); (T.S.)
| | - Aaron S. Gomez
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA; (S.G.); (M.R.); (K.S.); (A.S.G.); (A.-K.V.); (A.C.); (T.S.)
| | - Ann-Katrin Valencia
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA; (S.G.); (M.R.); (K.S.); (A.S.G.); (A.-K.V.); (A.C.); (T.S.)
| | - Adonicah Cummings
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA; (S.G.); (M.R.); (K.S.); (A.S.G.); (A.-K.V.); (A.C.); (T.S.)
| | - Timothy Skerry
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA; (S.G.); (M.R.); (K.S.); (A.S.G.); (A.-K.V.); (A.C.); (T.S.)
| | - Ferial Alloush
- The Arkadi M. Rywlin M.D. Department of Pathology and Laboratory Medicine, Mount Sinai Medical Center, Miami Beach, FL 33140, USA; (F.A.); (A.D.); (S.A.); (R.P.)
| | - Abed A. Aljamal
- Department of Medicine, Division of Hematology Oncology, Medical University of South Carolina, Charleston, SC 29425, USA;
| | - Arunima Deb
- The Arkadi M. Rywlin M.D. Department of Pathology and Laboratory Medicine, Mount Sinai Medical Center, Miami Beach, FL 33140, USA; (F.A.); (A.D.); (S.A.); (R.P.)
| | - Sarah Alghamdi
- The Arkadi M. Rywlin M.D. Department of Pathology and Laboratory Medicine, Mount Sinai Medical Center, Miami Beach, FL 33140, USA; (F.A.); (A.D.); (S.A.); (R.P.)
- Department of Pathology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA
| | - Robert Poppiti
- The Arkadi M. Rywlin M.D. Department of Pathology and Laboratory Medicine, Mount Sinai Medical Center, Miami Beach, FL 33140, USA; (F.A.); (A.D.); (S.A.); (R.P.)
- Department of Pathology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA
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Bošnjak M, Kojc N. Reparative Perineural Hyperplasia in the Gastric Wall: A Histologic Mimic of Perineural Invasion. Int J Surg Pathol 2021; 29:903-905. [PMID: 33909526 DOI: 10.1177/10668969211013469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Reparative perineural hyperplasia is an incidental and probably underreported reactive histologic finding thus far only reported in the setting of healing wounds or adjacent to a dermatofibroma in cutaneous specimens. It is characterized by a focal concentric proliferation of cytologically bland spindled perineurial cells and is hence considered a benign histologic mimic of neoplastic perineural invasion. Thus, it may present a diagnostic pitfall and we therefore consider it as a valuable entity to be aware of. To the best of our knowledge, this brief case report is the first to convey that reparative perineural hyperplasia may also occur in the gastrointestinal tract. It may therefore be a ubiquitous reactive histological phenomenon relating to previous surgical or traumatic wounds in various sites, that is, outside the thus far established setting of skin reexcision specimens.
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Affiliation(s)
| | - Nika Kojc
- Institute of Pathology, Ljubljana, Slovenia
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Abstract
Perineural invasion (PNI) is characterized as tumoral or nontumoral cells invading in or around the nerves. The neural invasion is considered as a histopathologic characteristic for malignancy and is considered a mechanism for its spread. Both of these patterns usually portend a poor prognosis and very often are markers to prompt additional treatment. There are also some nonmalignancies representing PNI, including benign neoplasms, mimicking lesions, and disorders, such as chronic pancreatitis and endometriosis. The previously recommended terms are PNI, spread, or infiltration. To distinguish PNI in malignancies from that in nonmalignancies, we propose the term "perineural pseudoinvasion" to convey their nonmalignant behavior. Despite the low prevalence, awareness of this benign pseudoinvasion is necessary to avoid aggressive treatment and its misdiagnosis with malignancies. We conducted a systematic search in PubMed and Scopus databases up to December 2015 to find articles reporting PNI in nonmalignancies. After screening, 63 articles were identified as relevant. There were also 2 review articles discussing PNI in nonmalignancies. We aim to present an overview of the perineural pseudoinvasion and to discuss the previously published review articles.
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McCalmont TH, Humberson C. Neurotropism in association with desmoplastic trichoepithelioma. J Cutan Pathol 2012; 39:312-4. [PMID: 22335588 DOI: 10.1111/j.1600-0560.2012.01877_2.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Timothy H McCalmont
- Departments of Pathology and Dermatology, University of California, San Francisco, Scripps Clinic, La Jolla, CA, USA
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