Journal of Pathology and Translational Medicine

Case Study

Malignant potential of neuroendocrine microtumor of the pancreas harboring high-grade transformation: lesson learned from a patient with von Hippel-Lindau syndrome: Jongwon Lee, Kyung Jin Lee, Dae Wook Hwang, Seung-Mo Hong; J Pathol Transl Med. 2024;58(2):91-97. Published online March 13, 2024; DOI: https://doi.org/10.4132/jptm.2024.02.13

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Abstract PDF: Pancreatic neuroendocrine microtumor (PNEMT) is a neuroendocrine tumor (NET) < 0.5 cm in diameter, and it is considered benign. We report a PNEMT with high-grade transformation (HGT). A man in his 60s with von Hippel-Lindau syndrome underwent surgical resection of a NET. A second sub-centimeter nodule with a nodule-in-nodule pattern was discovered. The 0.4 cm outer nodule contained clear columnar cells with round nuclei and indistinct nucleoli, while the 0.1 cm inner nodule had eosinophilic cells with an increased nuclear to cytoplasmic ratio, vesicular nuclei, and prominent nucleoli. Tumor cells in the outer and inner nodules were synaptophysin and chromogranin positive. Only the inner nodule was p53 positive, while the outer nodule was exclusively positive for carbonic anhydrase 9 and vimentin. The Ki-67 labeling indices for the outer and inner nodules were 2.1% (grade 1) and 44.3% (grade 3), respectively. This nodule was determined to be a PNEMT with HGT. Our findings suggest that a PNEMT may not always be benign and can undergo HGT.

Review

Acute Atherosis of the Uterine Spiral Arteries: Clinicopathologic Implications: Joo-Yeon Kim, Yeon Mee Kim; J Pathol Transl Med. 2015;49(6):462-471. Published online November 4, 2015; DOI: https://doi.org/10.4132/jptm.2015.10.23

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Acute atherosis is unique vascular changes of the placenta associated with poor placentation. It is characterized by subendothelial lipid-filled foam cells, fibrinoid necrosis of the arterial wall, perivascular lymphocytic infiltration, and it is histologically similar to early-stage atherosclerosis. Acute atherosis is rare in normal pregnancies, but is frequently observed in non- transformed spiral arteries in abnormal pregnancies, such as preeclampsia, small for gestational age (SGA), fetal death, spontaneous preterm labor and preterm premature rupture of membranes. In preeclampsia, spiral arteries fail to develop physiologic transformation and retain thick walls and a narrow lumen. Failure of physiologic transformation of spiral arteries is believed to be the main cause of uteroplacental ischemia, which can lead to the production of anti-angiogenic factors and induce endothelial dysfunction and eventually predispose the pregnancy to preeclampsia. Acute atherosis is more frequently observed in the spiral arteries of the decidua of the placenta (parietalis or basalis) than in the decidual or myometrial segments of the placental bed. The presence and deeper location of acute atherosis is associated with poorer pregnancy outcomes, more severe disease, earlier onset of preeclampsia, and a greater frequency of SGA neonates in patients with preeclampsia. Moreover, the idea that the presence of acute atherosis in the placenta may increase the risk of future cardiovascular disease in women with a history of preeclampsia is of growing concern. Therefore, placental examination is crucial for retrospective investigation of pregnancy complications and outcomes, and accurate placental pathology based on universal diagnostic criteria in patients with abnormal pregnancies is essential for clinicopathologic correlation.

Citations

Citations to this article as recorded by

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Trends in Molecular Medicine.2023; 29(7): 541. CrossRef
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Journal of Perinatal Medicine.2022; 50(5): 553. CrossRef
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Abdul Wajid, David Todem, Mark R. Schleiss, David F. Colombo, Nigel S. Paneth
Maternal and Child Health Journal.2022; 26(10): 2040. CrossRef
Toward a new taxonomy of obstetrical disease: improved performance of maternal blood biomarkers for the great obstetrical syndromes when classified according to placental pathology
Roberto Romero, Eunjung Jung, Tinnakorn Chaiworapongsa, Offer Erez, Dereje W. Gudicha, Yeon Mee Kim, Jung-Sun Kim, Bomi Kim, Juan Pedro Kusanovic, Francesca Gotsch, Andreea B. Taran, Bo Hyun Yoon, Sonia S. Hassan, Chaur-Dong Hsu, Piya Chaemsaithong, Nardh
American Journal of Obstetrics and Gynecology.2022; 227(4): 615.e1. CrossRef
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International Journal of Molecular Sciences.2021; 22(2): 704. CrossRef
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American Journal of Reproductive Immunology.2021;[Epub] CrossRef
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Journal of Perinatal Medicine.2021; 49(4): 412. CrossRef
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Frontiers in Immunology.2021;[Epub] CrossRef
Aetiology, prophylaxis and management of preeclampsia
Karolina Gronkowska
Acta Universitatis Lodziensis. Folia Biologica et Oecologica.2021; 17: 111. CrossRef
HMOX1 is partly responsible for phenotypic and functional abnormalities in mesenchymal stem cells/stromal cells from placenta of preeclampsia (PE) patients
Yasser S. Basmaeil, Dana Algudiri, Reem Alenzi, Abdullah Al Subayyil, Ayodele Alaiya, Tanvir Khatlani
Stem Cell Research & Therapy.2020;[Epub] CrossRef
Analyzing Preeclampsia as the Tip of the Iceberg Represented by Women with Long-Term Cardiovascular Disease, Atherosclerosis, and Inflammation
Angélica Lemos Debs Diniz, Maria Marta Bini Martins Paes, Aline Debs Diniz
Current Atherosclerosis Reports.2020;[Epub] CrossRef
Lipids in preeclampsia: pathogenic parallels to atherosclerosis
V. I. Shcherbakov, Ya. V. Polonskaya, E. V. Kashtanova, A. V. Shirinskaya
"Arterial’naya Gipertenziya" ("Arterial Hypertension").2020; 26(2): 163. CrossRef
Transthyretin increases migration and invasion of rat placental trophoblast cells
Xiao‐Peng Ma, Chong‐Dong Liu, Guang‐Ming Cao, Zhen‐Yu Zhang
FEBS Open Bio.2020; 10(8): 1568. CrossRef
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Journal of the American Heart Association.2019;[Epub] CrossRef
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Navleen Gill, Yaozhu Leng, Roberto Romero, Yi Xu, Bogdan Panaitescu, Derek Miller, Afrah Arif, Salma Mumuni, Faisal Qureshi, Chaur‐Dong Hsu, Sonia S. Hassan, Anne Cathrine Staff, Nardhy Gomez‐Lopez
American Journal of Reproductive Immunology.2019;[Epub] CrossRef
The potential effects of pomegranate peel extract and bee venom in improving the diabetes induced damaging of spiral artery
HIH El-Sayyad, HA El-Ghawet, AMA El-Sayed
Studies on Stem Cells Research and Therapy.2019; 5(1): 007. CrossRef
Race and risk of maternal vascular malperfusion lesions in the placenta
Vanessa Assibey-Mensah, W. Tony Parks, Alison D. Gernand, Janet M. Catov
Placenta.2018; 69: 102. CrossRef
Preclinical atherosclerosis at the time of pre‐eclamptic pregnancy and up to 10 years postpartum: systematic review and meta‐analysis
N. M. Milic, J. Milin‐Lazovic, T. L. Weissgerber, G. Trajkovic, W. M. White, V. D. Garovic
Ultrasound in Obstetrics & Gynecology.2017; 49(1): 110. CrossRef
Is an episode of suspected preterm labor that subsequently leads to a term delivery benign?
Roberto Romero, Offer Erez, Eli Maymon, Percy Pacora
American Journal of Obstetrics and Gynecology.2017; 216(2): 89. CrossRef
Establishment of the Human Uteroplacental Circulation: A Historical Perspective
Kenna Degner, Ronald R. Magness, Dinesh M. Shah
Reproductive Sciences.2017; 24(5): 753. CrossRef
Preeclampsia and coronary plaque erosion: Manifestations of endothelial dysfunction resulting in cardiovascular events in women
Saskia C.A. de Jager, John A.L. Meeuwsen, Freeke M. van Pijpen, Gerbrand A. Zoet, Arjan D. Barendrecht, Arie Franx, Gerard Pasterkamp, Bas B. van Rijn, Marie-José Goumans, Hester M. den Ruijter
European Journal of Pharmacology.2017; 816: 129. CrossRef
Placental histopathology lesions and pregnancy outcome in pregnancies complicated with symptomatic vs. non-symptomatic placenta previa
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Early Human Development.2016; 101: 85. CrossRef
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Sizzle F. Vanterpool, Jasper V. Been, Michiel L. Houben, Peter G. J. Nikkels, Ronald R. De Krijger, Luc J. I. Zimmermann, Boris W. Kramer, Ann Progulske-Fox, Leticia Reyes, Motohiro Komaki
PLOS ONE.2016; 11(1): e0146157. CrossRef
Pregnant women with heart disease: Placental characteristics and their association with fetal adverse events
Fabio V. Lima, Paraskevi Koutrolou-Sotiropoulou, Puja B. Parikh, Cecilia Avila, Javed Butler, Kathleen Stergiopoulos
Acute Cardiac Care.2016; 18(3): 56. CrossRef

Case Report

Primitive Neuroectodermal Tumor Associated with Mature Cystic Teratoma of the Ovary: A case report.: Young Ju Kim, Mi Yeong Jeon, Mi Sun Kang, Chan Hwan Kim; Korean J Pathol. 1996;30(12):1150-1154.

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Abstract PDF: Malignant transformation of benign cystic teratomas of the ovary is rare, with an incidence rate of 1-3%. The most common malignancy associated with benign cystic teratoma of the ovary is squamous cell carcinoma, which represents 90% of malignant transformations, followed by adenocarcinoma and carcinoid. Primary malignant neuroectodermal tumor in a mature cystic teratoma is extremely rare and microscopically can be subclassified as differentiated, primitive, and anaplatic. We experienced a case of primitive neuroectodermal tumor (PNET) associated with mature cystic teratoma of the ovary in a 11-year-old girl. Grossly, the ovary was a unilocular cyst which contained sebum material and disclosed several large, yellow to gray-tan polypoid excresences attached to the inner cystic wall. Except a large, fish-flesh, soft mass, the other polypoid masses were covered with sebum and contained small pieces of cartilage and tooth, and microscopically represented as mature teratoma. The large, fish-flesh, soft mass disclosed sheets and lobules of closely packed small cells with thin fibrovascular septa, which frequently replacing and encroaching the mature cystic teratoma. The small tumor cells were uniform and made up of round to oval nuclei with coarse chromatin and prominent nucleoli, very similar to those of PNET of the central nervous system.

Original Articles

Meningioma with Multiple Recurrences and Malignant Transformation Differences in expression of MIB1, p53 and progesterone receptor.: Eun Joo Seo, Hi Jeong Kwon; Korean J Pathol. 1997;31(12):1314-1316.

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Abstract PDF: We describe herein a case of meningioma showing three recurrences and in the end malignant transformation. To compare the differences of MIB1, p53 and progesterone receptor expressions in benign, recurrent and malignant meningiomas of the same patient, we performed immunohistochemical stainings for those markers. MIB1 and p53 reactivities were increased in proportion to histologic aggressiveness. By contrast, the progesterone receptor expression was noted in benign meningioma but not in malignant meningioma.

PDGF-R alpha Expression in Preneoplastic and Neoplastic Hepatocellular Lesions: A Rat Model N-nitrosomorpholine Stop Experiment.: Su Jin Kim, Kyoung Tae Kim, Jin Sook Jeong; Korean J Pathol. 2006;40(5):354-360.

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Abstract PDF: BACKGROUND
N-nitrosomorpholine (NNM) is a genotoxic hepatocarcinogenic agent. Preneoplastic and neoplastic hepatocyte lesions were induced in rats by oral exposure to NNM (200 mg/L) in a stop model experiment. Platelet-derived growth factor receptor (PDGF-R) is a tyrosine kinase receptor that works with PDGF, stimulating cellular growth and proliferation. The present study was designed to determine the role of PDGF-R alpha expression in hepatocellular neoplasms and precursors.
METHODS
Seventeen rats out of a starting number of 30 died. From the fifth week until the 24th week one or two rats were evaluated. Preneoplastic single cells or foci, foci of altered hepatocytes (FAH) hepatocellular adenomas (HCA) and hepatocellular carcinomas (HCC) were studied histologically, and the expressions of GSTp and PDGF-R alpha by immunohistochemistry.
RESULTS
At the fifth week, GSTp +single cells showed PDGF-R alpha expression (20.8+/-5.8%). At the sixth week, GSTp +single cells, located at periportal areas, co-expressed PDGF-R alpha (43.4+/-9.6%). Over the next several weeks periportal hepatocytes showed weaker PDGF-R alpha expression but no GSTp. GSTp+FAH, and all HCA, demonstrated no PDGF-R alpha expression. However, nine out of 10 (90%) HCC showed PDGF-R alpha expression.
CONCLUSIONS
These data showed that there were two peaks of PDGF-R alpha expression, and suggest that the earlier expression is related with the response to NNM-induced hepatocyte toxicity, and that the later response is associated to malignant transformation.

Case Reports

A Case of Combined Hepatocellular and Cholangiocarcinoma with Neuroendocrine Differentiation and Sarcomatoid Transformation: A Case Report.: Mi Jung Kim, Hyun Lyoung Koo, Seung Kyu Lee, Jae Y Ro, Eunsil Yu; Korean J Pathol. 2005;39(2):125-129.

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Abstract PDF: We report here on a case of combined hepatocellular and cholangiocarcinoma (CHC) with neuroendocrine differentiation and sarcomatoid transformation. A 59-year-old male who had had HBV-associated chronic liver disease presented with hepatic masses. The explanted liver showed three small masses, two in the right lobe and one in the left lobe. The largest one in the right lobe was a 2.0 cm sized binodular mass,consisting of a yellowish tan nodule and an abutting reddish brown nodule. Microscopically, the reddish brown nodule was a cholangiocarcinoma (CC) showing neuroendocrine differentiation and sarcomatoid tranformation. The yellowish tan nodule and the remaining two masses were hepatocellular carcinoma (HCC)s. On immunohistochemistry, both the adenocarcinoma and spindle sarcomatoid cells were positive for pancytokeratin, but only the adenocarcinoma cells were positive for chromogranin and carcinoembryonic antigen (CEA). Mitotic and Ki67 labeling indices as well as p53 immunopositivity were significantly increased only in the CC component. We report here on the first case of CHC in which the CC displayed neuroendocrine differentiation and sarcomatoid transformation with high mitotic and Ki67-labeling indices, as well as having p53 overexpression.

High-grade Transformation of Primary Nodal Marginal Zone B-Cell Lymphoma: A Case Report.: Joo Heon Kim, Dong Wook Kang, Mee Ja Park, Jin Man Kim; Korean J Pathol. 2003;37(4):282-286.

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Abstract PDF: Primary nodal marginal zone B-cell lymphoma (MZBCL) is recognized as a rare and distinct entity. The rate of histologic transformation into diffuse large B-cell lymphoma (DLBCL) seems lower than the rate of transformation in follicular lymphoma. We herein report a rare case ofnodal MZBCL showing transformation into DLBCL. The patient was a 73-year-old female withcervical lymphadenopathy. On the initial biopsy, the lymph node architecture was diffuselyeffaced with an extensive interfollicular and parafollicular infiltrate of monocytoid B-cells. Therewere scattered large blastic B-cells without formations of compact sheets. The diagnosis ofnodal MZBCL was made. The patient did not receive chemotherapy and was treated with aconservatively supportive regimen. Forty two months later, the patient developed a new cervicallymphadenopathy and a biopsy was performed. Histologically, the lymph node revealeddiffuse sheets of transformed large B-cells showing prominent nucleoli. The diagnosis ofDLBCL transformed from nodal MZBCL was made. The patient was treated with 3 cycles ofcombined CHOP chemotherapy and she showed clinical improvement. These observationssuggest that an untreated primary nodal MZBCL may undergo high-grade transformation.

Original Article

An Ultrastructural Morphometric study of Follicular Center Lymphocytes of the palatine Tonsil: Reinvestigation of the Lukes-Collins' Classification of Malignant lymphoma.: Min Cheol Lee, Jong Han Shin; Korean J Pathol. 1994;28(5):493-505.

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Abstract PDF: The model of lymphocyte differentiation described for Lukes-Collins' classification of non-Hodgkin's lymphoma is related particularly to morphological alterations of nuclei of follicular center lymphocytes by antigenic stimulation. The authors carried out ultrastructural and morphometric studies to investigate morphological alterations during lymphocyte transformation on the nuclear profiles of follicular center, parafollicular and mantle zone lymphocytes in ten tonsillectomy cases of chronic hypertrophic tonsillitis. The nuclear parameters measured included nuclear area, contour index, frequency invagination and cleft, depth of invagination and nuclear diameters. Follicular centers contained a mixed population of lymphocytes consisting of untransformed (type 1), partially transformed (type 2) and fully transformed (type 3) lymphocytes. During lymphocyte transformation in both follicular, and parafollicular and mantle zones, the nuclei had a gradual and progressive increase in size. The nuclear contour index of type 2 nuclei of both follicular and parafollicular and mantle zones tended to be higher than those of type 1 and 3, indicating a greater degree of irregularity and variability of nuclear profiles. Invaginated and cleaved lymphocytes were not confined to me transformed lymphocytes. A considerable portion of lymphocytes had invaginations and clefts in parafollicular and mantle zone as well as follicular center. No difference on the depth of invagination was noted in type 1, type 2 and type 3 lymphocytes. The results indicate that some promise of the Lukes-Collins conepts of follicular center cells and the process of lymphocyte transformation in follicular centers may be necessary to revise

Case Report

Peutz-Jeghers Syndrome with Extensive Epithelial Misplacements and Adenomatous and Carcinomatous Transformation: A case report.: Jeong Ja Kwak, So Young Jin, Dong Wha Lee; Korean J Pathol. 1993;27(6):630-637.

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Abstract PDF: Peutz-Jeghers syndrome is an autosomal dominant disease characterized by gastrointestinal ployposis and mucocutaneous melanin pigmentation involving the lip, oral mucosa, digits, palms and soles. The polyps are almost hamartomatous. The relationship of gastrointestinal carcinoma and the Peutz-Jeghers syndrome has been discussed for many years. The question is unsettled whether gastrointestinal carcinoma arise in hamartomatous polyps itself. Recently, there are a few reports that adenomatous and carcinomatous changes were superimposed upon the background of the hamartoma. Occasionally epithelial misplacement of the epithelium is found in the small intestinal polyps. Since the epithelial misplacement may involve submucosa, muscularis propria and serosa, a difficulty of histopathologic differential diagnosis between the epithelial misplacement and invasive adenocarcinoma cause overdiagnosis of cancer in the gastrointestinal polyps of Peutz-Jeghers syndrome. We present a case of Peutz-Jeghers syndrome of 39-year-old woman with multiple gastrointestinal polyps, two of which showed extensive epithelial misplacement even into the pancreas and another one at the colon showed carcinomatous change at the tip portion. Areas of hamartoma, adenoma and in situ carcinoma were noted in this colonic hamartomatous polyp. This case support that adenoma and carcinomatous changes may evolve directly within a hamartomaous polyp itself.

Original Articles

A Morphologic Study on the Bile Duct Changes Induced by Common Bile Duct Ligation in Rats.: Jin Young Jeong, Dae Young Kang, Seung Moo Noh; Korean J Pathol. 1993;27(6):618-629.

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Abstract PDF: In an attempt to elucidate the pathological changes following common bile duct ligation, the present study was undertaken in male Sprague-Dawley rats. Morphologic studies of the livers were performed at 1, 2, 3, 5, 7, 9, 11, 13 and 15 weeks after common bile duct ligation. In an attempt to clarify the relationship between the process of bile duct formation and the nature of primitive cells observable around the primitive biliary structure, light microscopic, immunohistochemical and electron microscopic studies were performed. The results were noted as follows: 1) Light microscopically, proliferation of biliary cells began in the periphery of portal areas and expanded toward hepatic lobules. In severe cases of biliary structure proliferation, hepatocytic cords and classic hepatic lobules were inconspicuous. 2) Immunohistochemically, CK-19 expression was limited to biliary structures in protal areas and proliferated biliary epithelial cells. In the serial sections of paraffin block, proliferated intrahepatic biliary structures were associated with those of portal areas. Some oval cells in the ductular hepatocytes were stained for both CK-19 and MNF 116. 3) Ultrastructurally, the proliferated biliary epithelial cells divided into three patterns: absence of lumen, formation of incomplete lumen, and formation of complete lumen. Furthermore these patterns had spectral continuity of maturation in their structures. 4) In some biliary structures, individual biliary cells pushed the basement membrane toward neighboring tissue with accompanying destruction of basement membranes, patterns of budding. Sometimes these cells and hepatocytes comprised the same lumen. In summary, the results obtained by the present study indicate that proliferated biliary structures may be derived from the preexisting intralobular or portal biliary system.

Schneiderian Papillomas A Clinicopathologic Study of 27 Cases.: Chae Hong Suh, Ho Jong Chun; Korean J Pathol. 1987;21(4):227-232.

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Abstract PDF: Schneiderian papillomas are papillary lesions of the nasal cavity paranasal sinuses that arise from the Schneiderian membrane, a membrane of ectodermal origin embryologically derived from the nasal placodes. This membrane is characterized by transitional type epithelium, similar to bladder urothelium, with admixed microcysts or mucin droplets. It has a tendency to recur after removal and transform into malignancy even though rare. Total 27 cases of Schneiderian papillomas were examined in the Chosun University medical college, which were collected from 1978 to 1986. The results obtained were as follows: 1) There were 19 male and 8 female patients, and mean age at diagnosis was 50.5+/-12.0 (SD) year (27-74 years). 2) Nasal obstruction or perception of nasal mass was the most common presenting symptom; Mean duration of symptoms was 25.8+/-15.0 (SD) month (4-48 months). 3) Numbers of papillomas had predominantly endophytic (inverted, n=17) and predominantly exophytic (fungiofrom n=6) patients, and four had mixed pattern. 4) In 27 patients, recurrences developed in 9, local invasion in one (with an inverted papilloma), and epidermoid carcinoma in one (with an inverted papilloma).

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