1
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Abstract
A remarkable amount of new information has been generated on peritoneal mesothelioma (PeM), ranging from nomenclature changes, including the removal of "malignant" when referring to this neoplasm and the use of the term "tumor" rather than "mesothelioma" to designate the neoplasm formerly known as "well-differentiated papillary mesothelioma", to the acknowledgment that PeMs can be associated with tumor predisposition syndromes or germline mutations. Although the disease is still more frequently seen in caucasian males, PeM is not uncommon in women. In addition, it can represent a diagnostic challenge when it has an uncommon presentation (ie, paraneoplastic syndrome or incidental finding) or when it has confounding histologic features. Ancillary testing, including immunohistochemical stains, in situ hybridization for CDKN2A or NF2 , and molecular studies, in selected cases, allows its correct diagnosis. The molecular landscape of PeM is still a work in progress; however, some findings, such as ALK gene rearrangements and EWSR1/FUS-ATF1 fusions, are specifically seen in PeM of young patients. The biological behavior of PeM is variable; however, cytoreductive surgery and hyperthermic intraperitoneal chemotherapy have markedly improved the survival of patients affected by this disease.
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Affiliation(s)
- Anais Malpica
- Department of Pathology, The University of Texas M.D. Anderson Cancer Center, Houston, TX
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2
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Agaimy A, Brcic L, Briski LM, Hung YP, Michal M, Michal M, Nielsen GP, Stoehr R, Rosenberg AE. NR4A3 fusions characterize a distinctive peritoneal mesothelial neoplasm of uncertain biological potential with pure adenomatoid/microcystic morphology. Genes Chromosomes Cancer 2023; 62:256-266. [PMID: 36524687 DOI: 10.1002/gcc.23118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/30/2022] [Accepted: 12/11/2022] [Indexed: 12/23/2022] Open
Abstract
A focal adenomatoid-microcystic pattern is not uncommon in peritoneal mesothelioma, but tumors composed almost exclusively of this pattern are distinctly rare and have not been well characterized. A small subset of mesotheliomas (mostly in children and young adults) are characterized by gene fusions including EWSR1/FUS::ATF1, EWSR1::YY1, and NTRK and ALK rearrangements, and often have epithelioid morphology. Herein, we describe five peritoneal mesothelial neoplasms (identified via molecular screening of seven histologically similar tumors) that are pure adenomatoid/microcystic in morphology and unified by the presence of an NR4A3 fusion. Patients were three males and two females aged 31-70 years (median, 40 years). Three presented with multifocal/diffuse and two with a localized disease. The size of the individual lesions ranged from 1.5 to 8 cm (median, 4.7). The unifocal lesions originated in the small bowel mesentery and the mesosigmoid. Treatment included surgery, either alone (three) or combined with hyperthermic intraperitoneal chemotherapy (two), and neoadjuvant or adjuvant chemotherapy (one case each). At the last follow-up (6-13 months), all five patients were alive and disease-free. All tumors were morphologically similar, characterized by extensive sieve-like microcystic growth with bland-looking flattened cells lining variably sized microcystic spaces and lacked a conventional epithelioid or sarcomatoid component. Immunohistochemistry confirmed mesothelial differentiation, but most cases showed limited expression of D2-40 and calretinin. Targeted RNA sequencing revealed an NR4A3 fusion (fusion partners were EWSR1 in three cases and CITED2 and NIPBL in one case each). The nosology and behavior of this morphomolecularly defined novel peritoneal mesothelial neoplasm of uncertain biological potential and its distinction from adenomatoid variants of conventional mesothelioma merit further delineation as more cases become recognized.
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Affiliation(s)
- Abbas Agaimy
- Institute of Pathology, Friedrich Alexander University Erlangen-Nürnberg, University Hospital, Erlangen, Germany
| | - Luka Brcic
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Laurence M Briski
- Department of Pathology and Laboratory Medicine, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Yin P Hung
- Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Michael Michal
- Department of Pathology, Charles University, Faculty of Medicine in Plzen, Pilsen, Czech Republic
| | - Michal Michal
- Department of Pathology, Charles University, Faculty of Medicine in Plzen, Pilsen, Czech Republic
| | - G Petur Nielsen
- Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Robert Stoehr
- Institute of Pathology, Friedrich Alexander University Erlangen-Nürnberg, University Hospital, Erlangen, Germany
| | - Andrew E Rosenberg
- Department of Pathology and Laboratory Medicine, University of Miami Miller School of Medicine, Miami, Florida, USA
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3
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Kiyokawa T. Peritoneal Pathology Review: Mullerian, Mucinous and Mesothelial Lesions. Surg Pathol Clin 2022; 15:259-276. [PMID: 35715161 DOI: 10.1016/j.path.2022.02.005] [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] [Indexed: 06/15/2023]
Abstract
This review provides an overview of the pathology of selected benign and malignant lesions of the female peritoneum and their often-encountered differential diagnoses. It includes endometriosis and its related lesions, endosalpingiosis, pseudomyxoma peritonei (PMP) and related ovarian/appendiceal pathology, and malignant and benign mesothelial tumors. The current terminology associated with PMP is also discussed.
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Affiliation(s)
- Takako Kiyokawa
- Department of Pathology, The Jikei University School of Medicine, 3-25-8 Nishishimbashi Minato-ku, Tokyo 105-8461, Japan.
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4
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Seok D, Nagarkatti S, Cousineau C, Patil S, Jacobs M. OUP accepted manuscript. J Surg Case Rep 2022; 2022:rjac143. [PMID: 35382140 PMCID: PMC8975543 DOI: 10.1093/jscr/rjac143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 03/19/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- David Seok
- Corresponding address. Department of Surgery, Ascension Providence Hospitals, Southfield Campus, 16001 W Nine Mile Rd. Southfield, MI 48075, USA. Tel: 248-849-3000; E-mail:
| | - Sushruta Nagarkatti
- Department of Surgery, Ascension Providence Hospitals, Southfield Campus, 16001 W Nine Mile Rd. Southfield, MI 48075, USA
| | - Craig Cousineau
- Department of Pathology, Ascension Providence Hospitals, Southfield Campus, 16001 W Nine Mile Rd. Southfield, MI 48075, USA
| | - Sachin Patil
- Department of Surgery, Ascension Providence Hospitals, Southfield Campus, 16001 W Nine Mile Rd. Southfield, MI 48075, USA
| | - Michael Jacobs
- Department of Surgery, Ascension Providence Hospitals, Southfield Campus, 16001 W Nine Mile Rd. Southfield, MI 48075, USA
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5
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Hissong E, Graham RP, Wen KW, Alpert L, Shi J, Lamps LW. Adenomatoid tumours of the gastrointestinal tract - a case-series and review of the literature. Histopathology 2022; 80:348-359. [PMID: 34480486 PMCID: PMC8712375 DOI: 10.1111/his.14553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/16/2021] [Accepted: 08/29/2021] [Indexed: 01/03/2023]
Abstract
AIMS Adenomatoid tumours are mesothelial-derived benign neoplasms with a predilection for the genital tract. Extragenital sites are rare and can cause significant diagnostic challenges. Herein, we describe the clinicopathological features of a cohort of adenomatoid tumours involving the gastrointestinal tract and liver in order to more clearly characterise their histological findings and aid in diagnosis. METHODS AND RESULTS The pathology databases at four institutions were searched for adenomatoid tumours involving the gastrointestinal tract or liver, yielding eight cases. Available clinicoradiological and follow-up data were collected from the medical records. Six tumours were incidentally discovered during imaging studies or at the time of surgical exploration for unrelated conditions; presenting symptoms were unknown in two patients. Histologically, the tumours were well-circumscribed, although focal ill-defined borders were present in four cases. No infiltration of adjacent structures was identified. Architectural heterogeneity was noted in five (63%) tumours; an adenoid pattern often predominated. The neoplastic cells were flattened to cuboidal with eosinophilic cytoplasm. Cytoplasmic vacuoles mimicking signet ring-like cells were present in five (63%) cases. Three (38%) cases showed involvement of the mesothelium with reactive mesothelial hyperplasia. Cytological atypia or increased mitotic activity was not identified. The surrounding stroma ranged from oedematous/myxoid to densely hyalinised. Immunohistochemistry confirmed mesothelial origin in all cases evaluated. No patients developed recurrence of disease. CONCLUSIONS The current study evaluates the clinicopathological findings in a collective series of gastrointestinal and hepatic adenomatoid tumours, correlating with those described in individually reported cases. We highlight common histological features and emphasise variable findings that could mimic a malignant neoplasm.
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Affiliation(s)
- Erika Hissong
- Department of Pathology, University of Michigan, Ann Arbor, MI
| | - Rondell P Graham
- Department of Laboratory Medicine and Pathology, Mayo Clinic Rochester, Rochester, MN
| | - Kwun Wah Wen
- Department of Pathology, University of California, San Francisco, San Francisco, CA
| | - Lindsay Alpert
- Department of Pathology, University of Chicago, Chicago, IL
| | - Jiaqi Shi
- Department of Pathology, University of Michigan, Ann Arbor, MI
| | - Laura W Lamps
- Department of Pathology, University of Michigan, Ann Arbor, MI
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Adenomatoid Tumor: A Review of Pathology With Focus on Unusual Presentations and Sites, Histogenesis, Differential Diagnosis, and Molecular and Clinical Aspects With a Historic Overview of Its Description. Adv Anat Pathol 2020; 27:394-407. [PMID: 32769378 DOI: 10.1097/pap.0000000000000278] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Adenomatoid tumors have been described almost a century ago, and their nature has been the subject of debate for decades. They are tumors of mesothelial origin usually involving the uterus, the Fallopian tubes, and the paratesticular region. Adenomatoid tumors of the adrenal gland, the liver, the extragenital peritoneum, the pleura, and the mediastinum have been rarely reported. They are usually small incidental findings, but large, multicystic and papillary tumors, as well as multiple tumors have been described. Their pathogenesis is related to immunosuppression and to TRAF7 mutations. Despite being benign tumors, there are several macroscopic or clinical aspects that could raise diagnostic difficulties. The aim of this review was to describe the microscopic and macroscopic aspects of adenomatoid tumor with a special focus on its differential diagnosis and pathogenesis and the possible link of adenomatoid tumor with other mesothelial lesions, such as the well-differentiated papillary mesothelioma and the benign multicystic mesothelioma, also known as multilocular peritoneal cysts.
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Ferreira I, De Lathouwer O, Fierens H, Theunis A, André J, de Saint Aubain N. Adenomatoid tumor of the skin: Differential diagnosis of an umbilical erythematous plaque. J Cutan Pathol 2020; 48:128-132. [PMID: 32918316 DOI: 10.1111/cup.13872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 08/26/2020] [Accepted: 08/31/2020] [Indexed: 11/26/2022]
Abstract
Adenomatoid tumors are benign tumors of mesothelial origin that are usually encountered in the genital tract. Although they have been observed in other organs, the skin appears to be a very rare location, with only one case reported in the literature to our knowledge. We report a second case of an adenomatoid tumor, arising in the umbilicus of a 44-year-old woman. The patient presented with an 8-month-old erythematous and firm plaque under the umbilicus. A skin biopsy showed numerous microcystic spaces dissecting a fibrous stroma and lined by flattened to cuboidal cells with focal intraluminal papillary formation. This little-known diagnosis constitutes a diagnostic pitfall for dermatopathologists and dermatologists, and could be misdiagnosed as other benign or malignant entities. Through this case report, a practical approach and diagnostic keys have been devised to avoid misdiagnosis and overtreatment.
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Affiliation(s)
- Ingrid Ferreira
- Dermatopathology laboratory, Department of Dermatology, Saint-Pierre University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Olivier De Lathouwer
- Department of Plastic Surgery, Centre Hospitalier Interrégional Edith Cavell, Brussels, Belgium
| | - Hugues Fierens
- Department of Dermatology, Saint-Jean Hospital, Brussels, Belgium
| | - Anne Theunis
- Dermatopathology laboratory, Department of Dermatology, Saint-Pierre University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Josette André
- Dermatopathology laboratory, Department of Dermatology, Saint-Pierre University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Nicolas de Saint Aubain
- Department of Pathology, Jules Bordet Institute, Université Libre de Bruxelles, Brussels, Belgium
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Mori D, Kido S, Hiraki M, Sumi K, Ureshino N, Masuda M, Nabeshima K, Akashi M. Peritoneal adenomatoid (microcystic) mesothelioma. Pathol Int 2020; 70:876-880. [PMID: 32881200 DOI: 10.1111/pin.13006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/23/2020] [Accepted: 07/28/2020] [Indexed: 11/27/2022]
Abstract
There are several reports of pleural adenomatoid (microcystic) mesothelioma, but peritoneal adenomatoid mesothelioma is extremely rare. A 64-year-old Japanese woman presented with no symptoms and no asbestos exposure history. An abdominal computed tomography scan revealed multiple hypervascular masses on the liver surface, pelvic cavity and anterior peritoneum. Over 10 pieces of the multiple resected tumors showed numerous microcysts composed of a bland mesothelial cell background with rich capillary vessels. Focally, atypical cells with bizarre nuclei with prominent nucleoli were observed. Adenomatoid mesothelioma was suspected based on histochemical, immunohistochemical and fluorescence in situ hybridization findings. The tumors relapsed 4 years later and metastasized to the lung, but the patient remains alive 7 years after the first tumor resection surgery. Although the prognosis of adenomatoid mesothelioma of pleural origin is poor, the progression of this peritoneal case is slow.
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Affiliation(s)
- Daisuke Mori
- Department of Pathology, SAGA-KEN Medical Centre, Saga, Japan
| | - Shinichi Kido
- Department of Pathology, SAGA-KEN Medical Centre, Saga, Japan
| | | | - Kenji Sumi
- Department of Surgery, SAGA-KEN Medical Centre, Saga, Japan
| | - Norio Ureshino
- Department of Medical Oncology, SAGA-KEN Medical Centre, Saga, Japan
| | - Masanori Masuda
- Department of Pathology, SAGA-KEN Medical Centre, Saga, Japan
| | - Kazuki Nabeshima
- Department of Pathology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Michiaki Akashi
- Department of Pathology, SAGA-KEN Medical Centre, Saga, Japan
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Lao IW, Wang J. Adenomatoid tumor of the small intestine: the first case report and review of the literature. Int J Surg Pathol 2014; 22:727-30. [PMID: 24891555 DOI: 10.1177/1066896914537680] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The case represents the first literature report of an adenomatoid tumor that arises primarily in the small intestine of a 44-year-old woman, who presented with intermittent upper abdominal pain accompanied by nausea and vomiting. The resected tumor was grossly unencapsulated and had a gray-tan color on its cut surface. Microscopically, it consisted of variably sized tubules and glandular spaces which involved the whole layers of the intestine. The mesothelial nature of the lesion was subsequently verified by the immunopositivity for pancytokeratin (AE1/AE3), HBME-1, calretinin, D2-40, and WT1 with cells lining the tubules and glandular spaces. Albeit very rare, adenomatoid tumor should be included in the differential diagnosis of tubular or glandular tumors occurring in the small intestine.
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Affiliation(s)
- I Weng Lao
- Fudan University Shanghai Cancer Center, Shanghai, China
| | - Jian Wang
- Fudan University Shanghai Cancer Center, Shanghai, China
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11
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Kim JB, Yu E, Shim JH, Song GW, Kim GU, Jin YJ, Park HS. Concurrent hepatic adenomatoid tumor and hepatic hemangioma: a case report. Clin Mol Hepatol 2012; 18:229-34. [PMID: 22893875 PMCID: PMC3415884 DOI: 10.3350/cmh.2012.18.2.229] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Revised: 10/10/2011] [Accepted: 10/25/2011] [Indexed: 11/05/2022] Open
Abstract
A 45-year-old male with alleged asymptomatic hepatic hemangioma of 4 years duration had right upper-quadrant pain and was referred to a tertiary hospital. Computed tomography and magnetic resonance imaging scans revealed a hypervascular mass of about 7 cm containing intratumoral multilobulated cysts. A preoperative liver biopsy was performed, but this failed to provide a definitive diagnosis. The patient underwent a partial hepatectomy of segments IV and VIII. The histologic findings revealed multifocal proliferation of flattened or cuboidal epithelioid cells and a highly vascular edematous stroma. Immunohistochemistry findings demonstrated that the epithelioid tumor cells were positive for cytokeratin (AE1/AE3), vimentin, calretinin, and cytokeratin 5/6, and were focally positive for CD10, and negative for WT1 and CD34, all of which support their mesothelial origin. Immunohistochemistry for a mesothelial marker should be performed for determining the presence of an adenomatoid tumor when benign epithelioid cells are seen.
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Affiliation(s)
- Ji-Beom Kim
- Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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12
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Abstract
Context.—Diagnosing epithelioid serosal lesions remains a challenge because numerous different processes—primary or secondary, benign or malignant—occur in body cavities, some of which are very rare.
Objectives.—To review the newest literature and to describe the morphologic criteria and immunohistochemical markers that are useful for distinguishing epithelioid serosal lesions.
Data Sources.—Previously published literature concentrating on the newest research findings. Earlier reviews are principally referred to for established diagnostic criteria.
Conclusions.—Immunohistochemistry with a panel of antibodies has made the diagnosis of epithelioid serosal lesions very reliable. When deciding on antibodies used in differential diagnosis, it is important to consider tumor location, clinical and radiologic information, and morphologic features. Immunohistochemistry is less useful in the differential diagnosis of benign versus malignant mesothelial lesions. The diagnosis of benign versus malignant mesothelial proliferations still relies on the histologic criteria of invasion.
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13
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Adachi S, Yanagawa T, Furumoto A, Fujino S, Doi R, Dono K, Kitada M. Adenomatoid tumor of the liver. Pathol Int 2012; 62:153-4. [DOI: 10.1111/j.1440-1827.2011.02767.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Ruiz-Tovar J, Santos J, Lopez-Delgado A, Orduña A, Calpena R. Transmural peritoneal adenomatoid tumour in the ileocaecal region causing massive haemoperitoneum and low gastrointestinal bleeding: differential diagnosis with capillary haemangiomas. Ann R Coll Surg Engl 2011; 93:e3-5. [PMID: 21944783 DOI: 10.1308/003588411x13008844892887] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Peritoneal adenomatoid tumours are rare benign neoplasms originating from mesothelial cells. We present a case of peritoneal adenomatoid tumour penetrating into the bowel wall and causing massive intra- and extraluminal bleeding.
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Affiliation(s)
- Jaime Ruiz-Tovar
- Department of Surgery, General University Hospital, Elche, Alicante, Spain.
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Wachter DL, Wünsch PH, Hartmann A, Agaimy A. Adenomatoid tumors of the female and male genital tract. A comparative clinicopathologic and immunohistochemical analysis of 47 cases emphasizing their site-specific morphologic diversity. Virchows Arch 2011; 458:593-602. [PMID: 21337036 DOI: 10.1007/s00428-011-1054-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 01/31/2011] [Accepted: 02/01/2011] [Indexed: 11/26/2022]
Abstract
Adenomatoid tumors (ATs) are uncommon benign mesothelial tumors with a predilection for the genital tract. We reviewed 47 ATs diagnosed at our institutions during 10-year period. Thirty tumors (64%) originated in the female (21 uterine, 8 tubal, and 1 ovarian) and 17 (36%) in the male (9 epididymal and 8 testicular) genital tract. The median age for females and males was 47.5 and 51 years, respectively. While 83% of tumors in females were incidental findings in resections for unrelated diseases, 94% of male lesions presented as clinical masses leading to surgery. The median size was 2, 1, and 0.5 cm for uterine, epididymo-testicular, and tubo-ovarian lesions, respectively. Architecturally, the microcystic/angiomatoid pattern was the most frequent (32/47; 68%), followed by combined microcystic/trabecular (26/47; 55%) and retiform/adenoid (15/47; 32%) pattern. The trabecular/solid (6%) and macrocystic (4%) patterns were uncommon. However, 57% of cases revealed ≥2 growth patterns. Taken by anatomic site, 20 of 21 uterine cases were at least focally microcystic but none was retiform. In contrast, the retiform pattern dominated in male genital tract tumors (12/17; 71%). Immunohistochemistry showed expression of calretinin (36/36) and D2-40 (30/30) and lack of CD34 (0/30) and PAX8 (0/32). GLUT-1 was expressed in 11/11 male genital tract tumors but in none of the microcystic uterine lesions. Estrogen and progesterone receptor expression was weak and focal (two and three uterine cases, respectively). None stained for the androgen receptor. Our study illustrates the great site-specific morphological diversity of ATs emphasizing their wide site-dependent differential diagnosis.
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Affiliation(s)
- David L Wachter
- Institute of Pathology, University Hospital Erlangen, Krankenhausstrasse 12, Erlangen, Germany
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Adenomatoid tumors of the female and male genital tracts: a clinicopathological and immunohistochemical study of 44 cases. Mod Pathol 2009; 22:1228-35. [PMID: 19543245 DOI: 10.1038/modpathol.2009.90] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Adenomatoid tumors of the female and male genital tracts are well characterized as mesothelial in origin, but a detailed histological and immunohistochemical analysis comparing both traditional and newer mesothelial markers across gender and site has not been formally conducted. A variety of morphologic features previously described as characteristic of adenomatoid tumors were evaluated in 44 adenomatoid tumors from the male and female genital tracts. Immunohistochemical analysis with pankeratin (AE1/CAM5.2), WT-1, calretinin, CK5/6, D2-40, and caldesmon was also performed. The extent and intensity of staining were scored semiquantitatively on one representative section per case and mean value for each parameter was calculated. All (n=44) the adenomatoid tumors from both the female and male genital tracts demonstrated a distinctive thread-like bridging strand pattern. Lymphoid aggregates were seen in all 12 adenomatoid tumors of male patients, but in only 4 of 32 (13%) tumors in female patients (P<0.0001). The remaining morphologic features were variably present with no clear sex predilection. Pankeratin, calretinin, and D2-40 reactivity were identified in all female (n=32) and male (n=12) genital tract adenomatoid tumors. Adenomatoid tumors expressed WT-1 in 11/12 (92%) male patients and in 31/32 (97%) female patients. In male patients, reactivity for CK5/6 and caldesmon was found in 1/12 (8%) and 0/12 (0%) adenomatoid tumors (respectively), whereas reactivity in female patients was found in 5/32 (16%) and 1/32 (3%); respectively. Female tumors differ from their male counterparts by the frequent absence of lymphoid aggregates and the presence of a circumscribed margin when occurring in the fallopian tube. Of the putative mesothelial markers evaluated, calretinin, D2-40, and WT-1 show a similar immunoprofile and have a higher sensitivity than CK5/6 and caldesmon in genital tract adenomatoid tumors. However, the presence of additional, often strong expression of WT-1 in normal tissues of the female genital tract limits the utility of WT-1 in this setting.
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Lins CMC, Elias J, Cunha AF, Muglia VF, Monteiro CR, Valeri FV, Feres O. MR imaging features of peritoneal adenomatoid mesothelioma: a case report. Clinics (Sao Paulo) 2009; 64:264-9. [PMID: 19330256 PMCID: PMC2666464 DOI: 10.1590/s1807-59322009000300020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
- Cynthia Maria Coelho Lins
- Department of Internal Medicine, Radiology Division, School of Medicine of Ribeirão Preto, University of Sao Paulo - Ribeirão Preto/SP, Brazil
| | - Jorge Elias
- Department of Internal Medicine, Radiology Division, School of Medicine of Ribeirão Preto, University of Sao Paulo - Ribeirão Preto/SP, Brazil
| | - Adilson Ferreira Cunha
- Department of Gynecology and Obstetrics, School of Medicine of São José do Rio Preto (FAMERP) - São José do Rio Preto/SP, Brazil
| | - Valdair Francisco Muglia
- Department of Internal Medicine, Radiology Division, School of Medicine of Ribeirão Preto, University of Sao Paulo - Ribeirão Preto/SP, Brazil
| | - Carlos Ribeiro Monteiro
- Department of Internal Medicine, Radiology Division, School of Medicine of Ribeirão Preto, University of Sao Paulo - Ribeirão Preto/SP, Brazil
| | - Fábio V. Valeri
- Victorio Valeri Institute of Medical Diagnosis - Ribeirao Preto/SP, Brazil
| | - Omar Feres
- Department of Surgery and Anatomy, School of Medicine of Ribeirão Preto, University of Sao Paulo - Ribeirão Preto/SP, Brazil. Tel.: 55 16 3602.2643,
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YEH CHIJU, CHUANG WENYU, CHOU HUNGHSUEH, JUNG SHIHMING, HSUEH SWEI. Multiple extragenital adenomatoid tumors in the mesocolon and omentum. APMIS 2008; 116:1016-9. [DOI: 10.1111/j.1600-0463.2008.01084.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Nagata S, Aishima S, Fukuzawa K, Takagi H, Yonemasu H, Iwashita Y, Kinoshita T, Wakasugi K, Ishigami S, Takao S, Aikou T. Adenomatoid tumour of the liver. J Clin Pathol 2006; 61:777-80. [PMID: 18505892 PMCID: PMC2569191 DOI: 10.1136/jcp.2007.054684] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
An unusual primary adenomatoid tumour arising in the normal liver is described. Hepatectomy was performed, and the patient is alive and free of disease 1 year postsurgery. Grossly, the tumour showed a haemorrhagic cut surface with numerous microcystic structures. Histological examination revealed cystic or angiomatoid spaces of various sizes lined by cuboidal, low-columnar, or flattened epithelioid cells with vacuolated cytoplasm and round to oval nuclei. The epithelioid cells were entirely supported by proliferated capillaries and arteries together with collagenous stroma. Immunohistochemical studies showed that the epithelioid cells were strongly positive for a broad spectrum of cytokeratins (AE1/AE3, CAM5.2, epithelial membrane antigen and cytokeratin 7) and mesothelial markers (calretinin, Wilms’ tumour 1 and D2-40). These cells were negative for Hep par-1, carcinoembryonic antigen, neural cell adhesion molecule, CD34, CD31 and HMB45. Atypically, abundant capillaries were observed; however, the cystic proliferation of epithelioid cells with vacuoles and immunohistochemical profile of the epithelioid element were consistent with hepatic adenomatoid tumour.
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Affiliation(s)
- S Nagata
- Department of Surgery, Nakabaru Hospital, Fukuoka, Japan.
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