Journal of Pathology and Translational Medicine

Case Study

Combined Adenosquamous and Large Cell Neuroendocrine Carcinoma of the Gallbladder: Jiyoon Jung, Yang-Seok Chae, Chul Hwan Kim, Youngseok Lee, Jeong Hyeon Lee, Dong-Sik Kim, Young-Dong Yu, Joo Young Kim; J Pathol Transl Med. 2018;52(2):121-125. Published online October 5, 2017; DOI: https://doi.org/10.4132/jptm.2017.08.20

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Large cell neuroendocrine carcinoma (LCNEC) of the gallbladder is extremely rare and usually combined with other type of malignancy, mostly adenocarcinoma. We report an unusual case of combined adenosquamous carcinoma and LCNEC of the gallbladder in a 54-year-old woman. A radical cholecystectomy specimen revealed a 4.3×4.0 cm polypoid mass in the fundus with infiltration of adjacent liver parenchyma. Microscopically, the tumor consisted of two distinct components. Adenosquamous carcinoma was predominant and abrupt transition from adenocarcinoma to squamous cell carcinoma was observed. LCNEC showed round cells with large, vesicular nuclei, abundant mitotic figures, and occasional pseudorosette formation. The patient received adjuvant chemotherapy. However, multiple liver metastases were identified at 3-month follow-up. Metastatic nodules were composed of LCNEC and squamous cell carcinoma components. Detecting LCNEC component is important in gallbladder cancer, because the tumor may require a different chemotherapy regimen and show early metastasis and poor prognosis.

Citations

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Does the size of the neuroendocrine-carcinoma component determine the prognosis of gallbladder cancer?
Ya-Fei Hu, Jun-Ke Wang, Wen-Jie Ma, Hai-Jie Hu, Han-Fei Gu, Fei Liu, Tian-Run Lv, Si-Qi Yang, Yu-Shi Dai, Rui-Qi Zou, Yan-Wen Jin, Fu-Yu Li
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Comparison of Metastatic Patterns Among Neuroendocrine Tumors, Neuroendocrine Carcinomas, and Nonneuroendocrine Carcinomas of Various Primary Organs
Hyung Kyu Park, Ghee Young Kwon
Journal of Korean Medical Science.2023;[Epub] CrossRef
Clinical features and outcomes analysis of Gallbladder neuroendocrine carcinoma
Man Jiang, Yijing Zhang
Journal of Cancer Research and Therapeutics.2023; 19(4): 910. CrossRef
Primary mixed large cell neuroendocrine carcinoma and adenocarcinoma of the gallbladder: A case report and literature review
Tingting Yu, Shike Li, Zhuo Zhang
Asian Journal of Surgery.2022; 45(11): 2336. CrossRef
Mixed neuroendocrine-non-neuroendocrine neoplasm of the gallbladder: case report and literature review
Xu Ren, Hong Jiang, Kan Sun, Xufu Qin, Yongping Qu, Tian Xia, Yan Chen
Diagnostic Pathology.2022;[Epub] CrossRef
Neuroendocrine Neoplasms of the Gallbladder: A Clinicopathological Analysis of 13 Patients and a Review of the Literature
Pengyan Wang, Jingci Chen, Ying Jiang, Congwei Jia, Junyi Pang, Shan Wang, Xiaoyan Chang, Oronzo Brunetti
Gastroenterology Research and Practice.2021; 2021: 1. CrossRef
Gallbladder Mixed Neuroendocrine-Non-neuroendocrine Neoplasm (MiNEN) Arising in Intracholecystic Papillary Neoplasm: Clinicopathologic and Molecular Analysis of a Case and Review of the Literature
Amedeo Sciarra, Edoardo Missiaglia, Mounir Trimech, Emmanuel Melloul, Jean-Philippe Brouland, Christine Sempoux, Stefano La Rosa
Endocrine Pathology.2020; 31(1): 84. CrossRef
Mixed neuroendocrine-non-neuroendocrine carcinoma of gallbladder: case report
Adam Skalický, Lucie Vištejnová, Magdaléna Dubová, Tomáš Malkus, Tomáš Skalický, Ondřej Troup
World Journal of Surgical Oncology.2019;[Epub] CrossRef

Brief Case Report

A Ciliated Cyst with Müllerian Differentiation Arising in the Posterior Mediastinum: So Jung Lee, Chung Su Hwang, Do Youn Park, Gi Young Huh, Chang Hun Lee; Korean J Pathol. 2014;48(5):401-404. Published online October 27, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.5.401

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Original Articles

Interobserver Variability in Diagnosing High-Grade Neuroendocrine Carcinoma of the Lung and Comparing It with the Morphometric Analysis: Seung Yeon Ha, Joungho Han, Wan-Seop Kim, Byung Seong Suh, Mee Sook Roh; Korean J Pathol. 2012;46(1):42-47. Published online February 23, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.1.42

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Abstract PDF

Background

Distinguishing small cell lung carcinoma (SCLC) and large cell neuroendocrine carcinoma (LCNEC) of the lung is difficult with little information about interobserver variability.

Methods

One hundred twenty-nine cases of resected SCLC and LCNEC were independently evaluated by four pathologists and classified according to the 2004 World Health Organization criteria. Agreement was regarded as "unanimous" if all four pathologists agreed on the classification. The kappa statistic was calculated to measure the degree of agreement between pathologists. We also measured cell size using image analysis, and receiver-operating-characteristic curve analysis was performed to evaluate cell size in predicting the diagnosis of high-grade neuroendocrine (NE) carcinomas in 66 cases.

Results

Unanimous agreement was achieved in 55.0% of 129 cases. The kappa values ranged from 0.35 to 0.81. Morphometric analysis reaffirmed that there was a continuous spectrum of cell size from SCLC to LCNEC and showed that tumors with cells falling in the middle size range were difficult to categorize and lacked unanimous agreement.

Conclusions

Our results provide an objective explanation for considerable interobserver variability in the diagnosis of high-grade pulmonary NE carcinomas. Further studies would need to define more stringent and objective definitions of cytologic and architectural characteristics to reliably distinguish between SCLC and LCNEC.

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Genomic Feature of a Rare Case of Mix Small-Cell and Large-Cell Neuroendocrine Lung Carcinoma: A Case Report
Youcai Zhu, Feng Zhang, Dong Yu, Fang Wang, Manxiang Yin, Liangye Chen, Chun Xiao, Yueyan Huang, Feng Ding
Frontiers in Oncology.2022;[Epub] CrossRef
Small-Cell Carcinoma of the Lung: What We Learned about It?
Luisella Righi, Marco Volante, Mauro Papotti
Acta Cytologica.2022; 66(4): 257. CrossRef
Hierarchical identification of a transcriptional panel for the histological diagnosis of lung neuroendocrine tumors
Juxuan Zhang, Jiaxing Deng, Xiao Feng, Yilong Tan, Xin Li, Yixin Liu, Mengyue Li, Haitao Qi, Lefan Tang, Qingwei Meng, Haidan Yan, Lishuang Qi
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Immunohistochemical Staining With Neuroendocrine Markers is Essential in the Diagnosis of Neuroendocrine Neoplasms of the Esophagogastric Junction
Dea N.M. Jepsen, Anne-Marie K. Fiehn, Rajendra S. Garbyal, Ulla Engel, Jakob Holm, Birgitte Federspiel
Applied Immunohistochemistry & Molecular Morphology.2021; 29(6): 454. CrossRef
Improving differential diagnosis of pulmonary large cell neuroendocrine carcinoma and small cell lung cancer via a transcriptomic, biological pathway-based machine learning model
Junhong Guo, Likun Hou, Wei Zhang, Zhengwei Dong, Lei Zhang, Chunyan Wu
Translational Oncology.2021; 14(12): 101222. CrossRef
Are Neuroendocrine Negative Small Cell Lung Cancer and Large Cell Neuroendocrine Carcinoma with WT RB1 two Faces of the Same Entity?
Dmitriy Sonkin, Anish Thomas, Beverly A Teicher
Lung Cancer Management.2019;[Epub] CrossRef
Ki-67 labeling index of neuroendocrine tumors of the lung has a high level of correspondence between biopsy samples and surgical specimens when strict counting guidelines are applied
Alessandra Fabbri, Mara Cossa, Angelica Sonzogni, Mauro Papotti, Luisella Righi, Gaia Gatti, Patrick Maisonneuve, Barbara Valeri, Ugo Pastorino, Giuseppe Pelosi
Virchows Archiv.2017; 470(2): 153. CrossRef
The Use of Immunohistochemistry Improves the Diagnosis of Small Cell Lung Cancer and Its Differential Diagnosis. An International Reproducibility Study in a Demanding Set of Cases
Erik Thunnissen, Alain C. Borczuk, Douglas B. Flieder, Birgit Witte, Mary Beth Beasley, Jin-Haeng Chung, Sanja Dacic, Sylvie Lantuejoul, Prudence A. Russell, Michael den Bakker, Johan Botling, Elisabeth Brambilla, Erienne de Cuba, Kim R. Geisinger, Kenzo
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Journal of Thoracic Oncology.2017; 12(6): e70. CrossRef
What clinicians are asking pathologists when dealing with lung neuroendocrine neoplasms?
Giuseppe Pelosi, Alessandra Fabbri, Mara Cossa, Angelica Sonzogni, Barbara Valeri, Luisella Righi, Mauro Papotti
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Unraveling Tumor Grading and Genomic Landscape in Lung Neuroendocrine Tumors
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Grading the neuroendocrine tumors of the lung: an evidence-based proposal
G Rindi, C Klersy, F Inzani, G Fellegara, L Ampollini, A Ardizzoni, N Campanini, P Carbognani, T M De Pas, D Galetta, P L Granone, L Righi, M Rusca, L Spaggiari, M Tiseo, G Viale, M Volante, M Papotti, G Pelosi
Endocrine-Related Cancer.2014; 21(1): 1. CrossRef
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BAI3, CDX2 and VIL1: a panel of three antibodies to distinguish small cell from large cell neuroendocrine lung carcinomas
Muhammad F Bari, Helen Brown, Andrew G Nicholson, Keith M Kerr, John R Gosney, William A Wallace, Irshad Soomro, Salli Muller, Danielle Peat, Jonathan D Moore, Lesley A Ward, Maxim B Freidin, Eric Lim, Manu Vatish, David R J Snead
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Morphologic Analysis of Pulmonary Neuroendocrine Tumors
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Altered expression of microRNA miR‐21, miR‐155, and let‐7a and their roles in pulmonary neuroendocrine tumors
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Composite Tumor of Adenocarcinoma and Small Cell Neuroendocrine Carcinoma of the Uterine Cervix: A Case Report.: Hye Rim Park, Yong Woo Lee, Young Euy Park; Korean J Cytopathol. 1990;1(1):111-120.

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Abstract PDF: Small cell neuroendocrine carcinoma of the uterine cervix is a distinct subtype of cervical cancer that appears analogous to oat cell carcinoma and carcinoid tumors of the lung. It has been assumed to be derived from the neural crest via argyrophilic cells in the normal endocervix. We have recently encountered a case of small cell neuroendocrine carcinoma of the uterine cervix coexisting with adenocarcinoma which was argyrophil negative. A 66-year-old multiparous woman was admitted because of vaginal bleeding for 2 months. Cervicovaginal smear revealed several scattered clusters and sheets of monotonous small cells with some peripheral palisading in the background of hemorrhage and necrosis. Radical hysterectomy specimen revealed and ulcerofungating tumor on endocervical canal which was composed of two components. Major component of the tumor was made up of monomorphic population of small oval-shaped tumor cells arranged in sheets and partly in acinar structeres or trabecular fashion. Other component was adenocarcinoma, endocervical well-differentiated type. Argyropilia was present on the Grimelius stain and immunohistochemical studies revealed diffuse positivity to neuron-specific enolase and carcinoembryonic antigen. Electron microscopic examination showed clusters of small round to oval cells, which had a few well-formed desmosomes and several membrane-bound, dense-core neurosectetory granules.

Case Report

Ovarian Large Cell Neuroendocrine Carcinoma Associated with Endocervical-like Mucinous Borderline Tumor: A Case Report and Literature Review.: Jun Mo Kim, Hyeong Chan Shin, Mi Jin Kim; Korean J Pathol. 2011;45(5):523-528.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.5.523

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Abstract PDF

Ovarian large cell neuroendocrine carcinoma is a rare tumor that is usually associated with surface epithelial tumors. Mucinous tumors are most common surface epithelial component identified in reported cases. Ovarian mucinous tumor associated with large cell neuroendocrine carcinoma is almost always an intestinal type. However, large cell neuroendocrine carcinoma associated with pure mucinous borderline tumor of endocervical-like type has not been described previously. The present case report describes a large cell neuroendocrine carcinoma associated with endocervical-like mucinous borderline tumor of the ovary in a 35-year-old woman. The tumor was confirmed by histopathology and immunohistochemistry. A review of the pertinent literature is included.

Citations

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The puzzle of gynecologic neuroendocrine carcinomas: State of the art and future directions
Giuseppe Caruso, Carolina Maria Sassu, Federica Tomao, Violante Di Donato, Giorgia Perniola, Margherita Fischetti, Pierluigi Benedetti Panici, Innocenza Palaia
Critical Reviews in Oncology/Hematology.2021; 162: 103344. CrossRef
Pathological features, clinical presentations and prognostic factors of ovarian large cell neuroendocrine carcinoma: a case report and review of published literature
Xiaohang Yang, Junyu Chen, Ruiying Dong
Journal of Ovarian Research.2019;[Epub] CrossRef
Primary pure large cell neuroendocrine carcinoma of the ovary
Chen-Hsien Lin, Yu-Chieh Lin, Mu-Hsien Yu, Her-Young Su
Taiwanese Journal of Obstetrics and Gynecology.2014; 53(3): 413. CrossRef
Pure Large Cell Neuroendocrine Carcinoma of Ovary: A Rare Clinical Entity and Review of Literature
P. N. Shakuntala, K. Uma Devi, K. Shobha, U. D. Bafna, M. Geetashree
Case Reports in Oncological Medicine.2012; 2012: 1. CrossRef

Original Article

Distinction of Pulmonary Large Cell Neuroendocrine Carcinoma from Small Cell Lung Carcinoma Using a Panel of Bcl-2, p63, and 34betaE12.: Jun Zhe Li, Chan Choi, Yoo Duk Choi, Kook Joo Na; Korean J Pathol. 2011;45(2):170-174.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.2.170

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Abstract PDF: BACKGROUND
Making the distinction between large cell neuroendocrine carcinoma (LCNEC) and small cell lung carcinoma (SCLC) is difficult in some samples of biopsy tissues, but we have to separate LCNEC from SCLC because the two types of cancer may need different therapy and they have different prognostic implications. Thus far, there are no specific immunohistochemical markers that allow distinguishing these two kinds of tumors.
METHODS
We performed an immunohistochemical analysis to study the expressions of p63, Bcl-2, and 34betaE12 and to investigate whether these 3 molecules have correlations in LCNEC and SCLC. We also evaluated the expression of the neuroendocrine markers chromogranin, synaptophysin and CD56.
RESULTS
A statistical analysis was performed for p63, Bcl-2, and 34betaE12 in separate and combined panels. According to the combinations of p63, Bcl-2, and 34betaE12, there were frequent expressions of p63-/Bcl-2+ or Bcl-2+/34betaE12- in the SCLC, and there was a superior proportion of them in the SCLC rather than that in the LCNEC. The p63-/Bcl-2+ and Bcl-2+/34betaE12- antibody combinations showed higher specificities compared to any single antibody for diagnosing SCLC.
CONCLUSIONS
Bcl-2 and selective p63 or 34betaE12 made up a most useful panel of markers for making the differential diagnosis of LCNEC and SCLC.

Case Report

Gastric Adenocarcinoma with Coexistent Hepatoid Adenocarcinoma and Neuroendocrine Carcinoma: A Case Report.: Aeri Kim, Sang Woon Kim, Sun Kyo Song, Young Kyung Bae; Korean J Pathol. 2009;43(1):79-82.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.1.79

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Abstract PDF

This report represents a very rare case of a gastric adenocarcinoma that was coexistent with hepatoid adenocarcinoma and neuroendocrine carcinoma. A 77-year-old man was admitted to our hospital due to a huge ulcerofungating mass identified at the proximal body of the stomach. After a pathological diagnosis of the tumor as a poorly differentiated adenocarcinoma was made, the patient underwent a total gastrectomy with lymph node dissection. Microscopically, the tumor consisted of three morphologically distinct components-tubular adenocarcinoma, hepatoid adenocarcinoma and neuroendocrine carcinoma. The hepatoid adenocarcinoma component resembled a hepatocellular carcinoma and produced alpha-fetoprotein. The neuroendocrine carcinoma component was positive for chromogranin and synaptophysin immunostains. This is an example of the diverse morphological and immunophenotypical differentiation of gastric carcinomas.

Citations

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An Intestinal Type Gastric Neuroendocrine Tumor: A Case Report
Mohammad Abu-Jeyyab, Renata Kakish, Malak Alkatib, Leen Alshawabkeh, Rawan Bani Hamad, Mary Almadani, Ma'wia Santarisi, Mohammad Al-Jafari, Abdulqadir J. Nashwan
Case Reports in Oncology.2023; 16(1): 1113. CrossRef
Gastric adenocarcinoma is concurrent with metastatic neuroendocrine cancer treated with nivolumab and chemotherapy: A case report
Bing Yan, Meiqi Cui, Junhao You, Fang Li, Hui Liu
Molecular and Clinical Oncology.2018;[Epub] CrossRef

Original Article

Immunohistochemical Study of Primary Large Cell Undifferentiated Carcinoma of the Lung.: Hye Seung Han, Jeong Wook Seo, Eui Keun Ham; Korean J Pathol. 1996;30(5):417-426.

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Abstract PDF: We performed a histopathologic and immunohistochemical study of 23 cases of surgically resected large cell undifferentiated carcinoma(LCUC) of the lung. The relative incidence of LCUC was 7.6% among the total resected cases of primary lung cancer over 7 years(1987-1993). The mean age of the patients was 56 years and 21 cases were male. The mean size of the mass was 5 cm and 11 cases were located peripherally. According to the histologic features, LCUC could be divided into three groups: squamous cell carcinoma-like(6 cases), adenocarcinoma-like(13 cases), and small cell carcinoma-like(4 cases) groups. The histologic differences were related to the variations of the immunohistochemical properties, but there were no differences in prognosis among these groups. Immunoreactivity to cytokeratin(CAM 5.2) was demonstrated in 22/23(96%). Carcinoembryonic antigen was positive in 13/23(57%). Neuron specific enolase and chromogranin were positive in 11/23(48%) and 5/23(22%), respectively. Vimentin was seen in 11/23(48%). From these observations, we could subclassify them by their immunologic phenotypes; exocrine features in 6/23(26%), neuroendocrine(NE) features in 4/23(17%), both exocrine and NE phenotypes in 7/23(30%), and 6 cases(26%) showed neither phenotype. The group with NE features showed a worse prognosis(P<0.05) and immunoreactivity for vimentin was also related to a worse prognosis(P<0.05). These findings imply that the immunohistochemical properties of LCUC are closely related to the histopathologic features. The groups, subdivided by histology and immunoreactivity, showed no prognostic difference except for the NE differentiation and reaction for vimentin.

Case Reports

Gastrointestinal Adenomatous Polyposis Associated with Small Cell Neuroendocrine Carcinoma of the Rectosigmoid: A case report.: Wan Seop Kim, Eun Kyung Hong, Kang Sik Kim, Kwang Soo Lee, Jung Dal Lee; Korean J Pathol. 1996;30(11):1040-1044.

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Abstract PDF: In adenomatous polyposis coli there are many colonic and extracolonic manifestations, and various combinations of these induce different clinical presentations and syndromes. We experienced a unique case of adenomatous polyposis of the large intestine and stomach in a 39-year-old man. In the colon, small cell neuroendocrine carcinoma rather than adenocarcinoma had developed, which did not contain adenomatous or carcinomatous foci. The adenomatous polyps in the colon were all small and sessile with no cancerous or precancerous change two years after the resection of the symptomatic gastric adenomas, even though the gastric adenomas were larger and showed dysplastic change. We think this case is another variant of adenomatous polyposis syndrome.

Gastric Collision Tumor (Adenocarcinoma and Neuro-endocrine Carcinoma): A Report of Two Cases.: Ho Sung Park, Ja Myoung Chung, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee; Korean J Pathol. 2001;35(1):76-79.

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Abstract PDF: Concurrence of adenocarcinoma and neuroendocrine carcinoma in the gastrointestinal tract has rarely been observed. We report two cases of gastric collision tumors (adenocarcinoma and neuroendocrine carcinoma) that developed in a 64-year-old man and a 71-year-old man. In both cases, there was a single ulcerative lesion in the stomach. Histologically, the gastric lesions were composed of two discrete lesions: tubular adenocarcinoma at the edge of an ulcer and neuroendocrine carcinoma in the ulcer base. We will discuss collision and composite tumors.

Urinary Cytologic Findings of Small Cell Neuroendocrine Carcinoma: A Case Report.: Dong Hoon Kim, Dong Wook Kang, Kyung Hee Kim, Ju Heon Kim, Mee Ja Park; Korean J Cytopathol. 2002;13(2):78-83.

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Abstract PDF: We report the cytologic features of a case of primary small cell carcinoma of the urinary bladder with high grade transitional cell and signet ring cell carcinomatous components. A 64-year-old male presented with gross hematuria for one week. Computed tomography revealed an ill-defined mass in the left lateral wall of the urinary bladder. Urinary cytology showed hypercellularity with predominantly isolated single cells and clustered cells. They have scanty cytoplasm and naked hyperchromatic nuclei with finely granular nuclear chromatin and rare nucleoli. The tumor cells occurred predominantly singe cells, but a few in clusters. Nuclear molding was prominent. No glandular formation or nesting was noted. The second tumor cells had high nuclear/cytoplasmic ratio, irregular nuclear membrane, and coarse granular chromatin. The background was inflamed and necrotic. The histologic findings of transurethral resection were mainly composed of small cell carcinoma, and partly transitional cell and signet ring cell carcinomatous components. Small cell neuroendocrine carcinoma have distinctive cytologic features to make a proper diagnosis.

Original Articles

The Clinicopathological Characteristics of Gastrointestinal Neuroendocrine Tumors; An Analysis of 65 Cases.: Hyunjoo Lee, Jungwoo Choi, Jung Suk An, Hyunchul Kim, Bong Kyung Shin, Aeree Kim, Hankyeom Kim, Insun Kim; Korean J Pathol. 2007;41(3):149-157.

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Abstract PDF: Background
: This study was designed to investigate gastrointestinal neuroendocrine tumors with an emphasis on their clinicopathological characteristics.
Methods
: Sixty-five cases were reviewed and classified as typical carcinoid (TC), atypical carcinoid (AC), large cell neuroendocrine carcinoma (LCNEC) and small cell carcinoma (SmCC). We performed immunohistochemistry to characterize the expression of the immunoreactivity for synaptophysin, chromogranin, gastrin, somatostatin, thyroid transcription factor-1, p53 and Ki-67.
Results
: Most commonly, the tumors were located in the rectum (54%), followed by the stomach (23%) and colon (9%). Histologically, the tumors were classified as 49 TCs, 4 ACs, 6 LCNECs and 6 SmCCs. Most tumors were stained positive for synaptophysin and/or chromogranin. Four LCNECs and one SmCC were p53-positive. The carcinoids revealed a low level (<5%) of reactivity for Ki-67, while > or =30% of the cells showed reactivity for Ki-67 in the majority of LCNECs and SmCCs. Six patients with metastatic carcinoids were older than those patients without metastasis (64 vs 48 years, respectively, p=0.004). Furthermore, the size of tumors was larger for the patients with metastatic carcinoids than for the patients with nonmetastatic carcinoids (2.3 vs 0.5 cm, respectively, p=0.005).
Conclusion
: Old age, large tumor size and muscle invasion are associated with high grade neuroendocrine tumor and lymph node metastasis for those patients with carcinoids.

Neuroendocrine Carcinoma of the Gallbladder Arising as Double Tumor.: Dae Hyun Baek, Seong Ki Min, Jin Man Kim, Kwang Sun Suh, Dae Young Kang; Korean J Pathol. 1990;24(3):299-303.

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Abstract PDF: Pleomorphic (undifferentated) carcinoma is a rare histologic type of carcinomas of the gallbladder and an atypical carcinoid is thought to be an intermediated type between carcinoid tumor and small cell carcinoma. Dense core "neurosecretory" granules can be found in the above mentioned tumors. We experienced a case of a double tumor of the gallbladder in a 51-year old male patient. Grossly, a large solid mass, about 5.0 cm in diameter, was found in the fundic portion and the neck portion also had a small 1.5 cm-sized polypoid mass. Microscopically, these lesions had features of pleomorphic carcinoma and atypical carcinoid, respectively. Immunohistochemically, they manifested reactivity for neuron specific enolase. Ultrastructural study revealed neurosecretory granules in the cytoplasms of tumor cells of the fundic and neck masses. Although light microscopic features of these tumor masses are quite different, we consider that these tumors represent a spectrum of neuroendocrine differentiation.

Case Reports

Pulmonary Adenocarcinoma of Fetal Type: Report of a case.: Nam Hoon Cho, Kwang Gil Lee; Korean J Pathol. 1990;24(3):287-293.

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Abstract PDF: Pulmonary adenocarcinoma of fetal type is a very uncommon tumor of the lung which simulates an early stage of lung differentiation. This is a primitive appearing epithelial tumor similar to the epithelial component of pulmonary blastoma but lacking the sarcomatous features. Since the report of Kradin et al, 8 more cases have been reported by a variety of name. These tumors are composed of glycogen-rich, non-ciliated tubular epithelial cells forming irregularly shaped tubules or arranged in a papillary pattern. A very remarkable findings of this tumor is the presence of endocrine cells which is confirmed by argyrophilia, immunohistochemistry or electron microscopy. We experienced a case of this tumor which showed hepatocytoid differentiation in addition to the characteristic histologic findings. Immunohistochemical studies performed on a resected tumor tissue showed immunoreactivity for alpha-fetoprotein, neuron-specific enolase and somatostatin, and endocrine type granules were found ultrastructurally. Although this tumor seems to have a relation with pulmonary blastoma in its histology, immunohistochemistry and ontogeny, a distinction between these should be attained because the average survival of the former group is longer as 23 months, while that of the latter is only 4 months.

Carcinoid Tumor of the Uterine Cercix: A light and electron microscopic study of two cases.: Moon Hyang Park, Jung Dal Lee, Yoon Young Hwang; Korean J Pathol. 1990;24(1):70-76.

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Abstract PDF: Two cases of carcinoid tumor of the uterine cervix were reported with emphasis on the histologic, cytologic, histochemical and electron microscopic appearance of tumor cells. Based on the light microscopic findings, one case was a well differentiated carcinoid with acinus formation, and the other was a poorly differentiated anaplastic type, being composed of small cells similar to those of oat cell carcinoma of the lung. Both tumors demonstrated scattered argyrophilic cells on Grimelius stain, and contained neurosecretory granules on electron microscopy. They were in stages II b and IV, respectively, at the time of presentation. The latter patient was treated with vinblastin, platinol and bleomycin, but died in 9 months after the initial diagnosis. The former was lost to follow-up study. Importance of distinction between this highly malignant tumor and other varieties of cervical cancer was emphasized.

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