Journal of Pathology and Translational Medicine

Case Study

A Rare Case of Adenosquamous Carcinoma Arising in the Background of IgG4-Related Lung Disease: Sangjoon Choi, Sujin Park, Man Pyo Chung, Tae Sung Kim, Jong Ho Cho, Joungho Han; J Pathol Transl Med. 2019;53(3):188-191. Published online March 11, 2019; DOI: https://doi.org/10.4132/jptm.2019.02.21

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IgG4-related disease is a systemic inflammatory disease and is known as IgG4-related lung disease (IgG4-RLD) when it involves the respiratory system. Primary lung cancer arising from a background of IgG4-RLD is very rare. Herein, we report a case of adenosquamous carcinoma arising from the background of IgG4-RLD and presenting as an interstitial lung disease pattern. A 66-year-old man underwent lobectomy under the impression of primary lung cancer. Grossly, the mass was ill-defined and gray-tan colored, and the background lung was fibrotic. Microscopically, tumor cells showed both squamous and glandular differentiation. Dense lymphoplasmacytic infiltration with fibrosis and obliterative phlebitis were seen in the background lung. IgG4 immunohistochemical stain showed diffuse positivity in infiltrating plasma cells. Primary lung adenosquamous carcinoma has not been reported in a background of IgG4-RLD. Due to the rarity of IgG4-RLD, physicians must follow patients with IgG4-RLD over long periods of time to accurately predict the risk of lung cancer.

Citations

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Endometrioid Carcinomas of the Ovaries and Endometrium Involving Endocervical Polyps: Comprehensive Clinicopathological Analyses
Jihee Sohn, Yurimi Lee, Hyun-Soo Kim
Diagnostics.2022; 12(10): 2339. CrossRef
A Case of IgG4-related Disease Composed of a Paravertebral Tumor Alone with Multiple Lung Cancers
Mutsumi Ozasa, Toyomitsu Sawai, Yosuke Harada, Sumako Yoshioka, Nobuko Matsuo, Hiroshi Mukae
Haigan.2021; 61(3): 213. CrossRef
Serous Carcinoma of the Endometrium with Mesonephric-Like Differentiation Initially Misdiagnosed as Uterine Mesonephric-Like Adenocarcinoma: A Case Report with Emphasis on the Immunostaining and the Identification of Splice Site TP53 Mutation
Sangjoon Choi, Yoon Yang Jung, Hyun-Soo Kim
Diagnostics.2021; 11(4): 717. CrossRef
A Case of IgG4-related Thyroiditis Diagnosed by Total Thyroidectomy
Daiki Sakamoto, Masao Yagi, Hiroshi Iwai
Practica Oto-Rhino-Laryngologica.2021; 114(7): 547. CrossRef
Mesonephric-like Differentiation of Endometrial Endometrioid Carcinoma: Clinicopathological and Molecular Characteristics Distinct from Those of Uterine Mesonephric-like Adenocarcinoma
Sujin Park, Go Eun Bae, Jiyoung Kim, Hyun-Soo Kim
Diagnostics.2021; 11(8): 1450. CrossRef
Mesonephric-like Adenocarcinoma of the Uterine Corpus: Comprehensive Immunohistochemical Analyses Using Markers for Mesonephric, Endometrioid and Serous Tumors
Hyunjin Kim, Kiyong Na, Go Eun Bae, Hyun-Soo Kim
Diagnostics.2021; 11(11): 2042. CrossRef
Not Cancer After All: Two Rare Cases of IgG4-Related Lung Disease
Josué Pinto, Carla Damas, António Morais
Archivos de Bronconeumología.2020; 56(1): 53. CrossRef
Not Cancer After All: Two Rare Cases of IgG4-Related Lung Disease
Josuèc) Pinto, Carla Damas, António Morais
Archivos de Bronconeumología (English Edition).2020; 56(1): 52. CrossRef
Axillary lymphadenopathy with IgG4 positive plasma cell infiltration as differential diagnosis of metastatic lung adenocarcinoma
Yutaro Ito, Masanori Harada, Namio Kagoo, Tsutomu Kubota, Koshiro Ichijyo, Eisuke Mochizuki, Masahiro Uehara, Shun Matsuura, Masaru Tsukui, Naoki Koshimizu
Respiratory Medicine Case Reports.2020; 31: 101196. CrossRef

Original Article

Pulmonary Nodular Lymphoid Hyperplasia with Mass-Formation: Clinicopathologic Characteristics of Nine Cases and Review of the Literature: Jongmin Sim, Hyun Hee Koh, Sangjoon Choi, Jinah Chu, Tae Sung Kim, Hojoong Kim, Joungho Han; J Pathol Transl Med. 2018;52(4):211-218. Published online June 15, 2018; DOI: https://doi.org/10.4132/jptm.2018.04.27

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Abstract PDF

Background
Pulmonary nodular lymphoid hyperplasia (PNLH) is a non-neoplastic pulmonary lymphoid disorder that can be mistaken for malignancy on radiography. Herein, we present nine cases of PNLH, emphasizing clinicoradiological findings and histological features.
Methods
We analyzed radiological and clinicopathological features from the electronic medical records of nine patients (eight females and one male) diagnosed with PNLH. IgG and IgG4 immunohistochemical staining was performed in three patients.
Results
Two of the nine patients had experienced tuberculosis 40 and 30 years prior, respectively. Interestingly, none were current smokers, although two were ex-smokers. Three patients complaining of persistent cough underwent computed tomography of the chest. PNLH was incidentally discovered in five patients during examination for other reasons. The remaining patient was diagnosed with the disease following treatment for pneumonia. Imaging studies revealed consolidation or a mass-like lesion in eight patients. First impressions included invasive adenocarcinoma and mucosal-associated lymphoid tissue‒type lymphoma. Aspergillosis was suspected in the remaining patient based on radiological images. Resection was performed in all patients. Microscopically, the lesions consisted of nodular proliferation of reactive germinal centers accompanied by infiltration of neutrophils and macrophages in various degrees and surrounding fibrosis. Ultimately, all nine patients were diagnosed with PNLH and showed no evidence of recurrence on follow-up.
Conclusions
PNLH is an uncommon but distinct entity with a benign nature, and understanding the radiological and clinicopathological characteristics of PNLH is important.

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Pulmonary Nodular Lymphoid Hyperplasia Evaluated with Bronchoalveolar Lavage Fluid Findings: A Case Report and Review of the Literature on Japanese Patients
Sakiko Moriyama, Takashi Kido, Noriho Sakamoto, Mai Fuchigami, Takatomo Tokito, Daisuke Okuno, Takuto Miyamura, Shota Nakashima, Atsuko Hara, Hiroshi Ishimoto, Yoshitaka Imaizumi, Kazuto Tsuruda, Katsunori Yanagihara, Junya Fukuoka, Hiroshi Mukae
Internal Medicine.2023; 62(1): 95. CrossRef
A Case of Pulmonary Nodular Lymphoid Hyperplasia Responding to Corticosteroid Treatment
Jonathan Teow Koon Goh, Issam Al Jajeh, Jessica Han Ying Tan
Cureus.2023;[Epub] CrossRef
Pulmonary nodular lymphoid hyperplasia presenting as cavitating lung mass
Aqeel Alameer, Chary Duraikannu, Avinash Kumar Kanodia, David Dorward
BMJ Case Reports.2023; 16(8): e254121. CrossRef
Clinicopathological Characteristics and Curative Effect of Lymphoma Based on Sampling Theory
Shuxiang Ding, Leipo Liu
Mathematical Problems in Engineering.2022; 2022: 1. CrossRef
Pulmonary nodular lymphoid hyperplasia presenting as multifocal subsolid nodules: A case report and literature review
Yoon Jin Cha, Duk Hwan Moon, Ji Hyun Park, Sungsoo Lee, Ji Ae Choi, Tae Hoon Kim, Chul Hwan Park
Respiratory Medicine Case Reports.2022; 36: 101581. CrossRef
Pulmonary nodular lymphoid hyperplasia in a 53-year-old man with malignant sign: a case report
Zhen Yang, Lianshuang Wei, Xu Li, Xin Liu
Journal of Cardiothoracic Surgery.2021;[Epub] CrossRef
The diagnostic challenge of adenocarcinoma in pulmonary nodular lymphoid hyperplasia
Anita Savić Vuković, Melita Kukuljan, Morana Dinter, Ksenija Jurinović, Nives Jonjić
SAGE Open Medical Case Reports.2021; 9: 2050313X2110393. CrossRef

Case Study

Pulmonary Arteriovenous Fistula: Clinical and Histologic Spectrum of Four Cases: Soomin Ahn, Joungho Han, Hong Kwan Kim, Tae Sung Kim; J Pathol Transl Med. 2016;50(5):390-393. Published online May 9, 2016; DOI: https://doi.org/10.4132/jptm.2016.04.18

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Abstract PDF

Pulmonary arteriovenous fistula (PAVF) is abnormally dilated vessels that provide a right-to-left shunt between pulmonary artery and pulmonary vein and is clinically divided into simple and complex type. Here, we report four cases of surgically resected sporadic PAVFs presenting various clinical and histologic spectrums. Cases 1 (a 57-old-female) and 2 (a 54-old-female) presented as incidentally identified single aneurysmal fistulas and the lesions were surgically removed without complication. On the other hand, case 3 (an 11-old-male) showed diffuse dilated vascular sacs involving both lungs and caused severe hemodynamic and pulmonary dysfunction. Embolization and surgical resection of the main lesion failed to relieve the symptoms. Case 4 (a 36-old-male) had a localized multiloculated cyst clinically mimicking congenital cystic adenomatoid malformation. Microscopically, the lesion consisted of dilated thick vessels, consistent with the diagnosis of fistulous arteriovenous malformation/hemangioma.

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Vimal Kumar Paliwal, Sucharita Anand, Vivek Singh
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Recurrent hemoptysis caused by arteriovenous malformation
Ivana Meta-Jevtović, Romana Suša, Bojan Đokić
Medicinski casopis.2020; 54(3): 120. CrossRef
A 10-year-old boy with dyspnea and hypoxia: abernathy malformation masquerading as pulmonary arteriovenous fistula
Lijian Xie, Yun Li, Xunwei Jiang, Jian Zhao, Tingting Xiao
BMC Pediatrics.2019;[Epub] CrossRef
Characteristics and analysis of right-to-left shunt-related dizziness in patients without hypoxemia
Liming Cao
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Brief Case Report

A Rare Case of Pulmonary Arteriovenous Hemangioma Presenting as a Peribronchial Mass: Soomin Ahn, Sejin Jung, Jong Ho Cho, Tae Sung Kim, Joungho Han; J Pathol Transl Med. 2016;50(3):243-245. Published online November 17, 2015; DOI: https://doi.org/10.4132/jptm.2015.10.15

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PDF

Citations

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Incidental discovery of a large complicated arteriovenous haemangioma
Alberto Anthony Goizueta, Peter Libbey, Anthony Moulton, Rabih El-Bizri
BMJ Case Reports.2017; : bcr-2016-218759. CrossRef
Pulmonary Arteriovenous Fistula: Clinical and Histologic Spectrum of Four Cases
Soomin Ahn, Joungho Han, Hong Kwan Kim, Tae Sung Kim
Journal of Pathology and Translational Medicine.2016; 50(5): 390. CrossRef

Original Article

Bronchial Schwannomas: Clinicopathologic Analysis of 7 Cases: Yoon Yang Jung, Min Eui Hong, Joungho Han, Tae Sung Kim, Jhingook Kim, Young-Mog Shim, Hojoong Kim; Korean J Pathol. 2013;47(4):326-331. Published online August 26, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.4.326

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Abstract PDF

Background

It has long been recognized that bronchial schwannomas are extremely rare. As such, diagnosing tumors in this extraordinary location can sometimes be problematic.

Methods

We reviewed seven cases of bronchoscopically or surgically resected endobronchial schwannomas and evaluated their clinical and pathologic features.

Results

The present study included five female and two male patients, with ages ranging from 16 to 81 years (mean age, 44.9 years). The clinical presentation varied according to tumor size and location. Patients with more centrally (trachea or main bronchus) located tumors experienced respiratory symptoms (80%) more often than patients with more peripherally (lobar or segmental bronchus) located tumors (0%). Histologically, the tumors were composed of spindle cells that stained with S100 protein. Some of the tumors showed typical Antoni A areas with Verocay body formation. Five of six patients (83.3%) underwent complete tumor removal by rigid bronchoscopy.

Conclusions

Pathologists should consider endobronchial schwannoma in the differential diagnosis of a spindle cell tumor involving the bronchus. Additionally, our results showed that rigid bronchoscopy is an effective tool for tumor removal in endobronchial schwannoma patients.

Citations

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Video-assisted thoracic surgery for an endobronchial ancient schwannoma obstructing the left main bronchus
Jiyeon Kang, Yeon Soo Kim, Ji-Ye Kim
Journal of Surgical Case Reports.2024;[Epub] CrossRef
Two cases of large tracheobronchial schwannomas completely resected by rigid bronchoscopy with multiple instruments
Changhwan Kim, Hae‐Seong Nam, Yousang Ko
Respirology Case Reports.2023;[Epub] CrossRef
Tracheobronchial schwannoma: a case report and literature review
Guo Lina, Hou Pengguo, Xiao Zhihua, Wang Jianxin, Bai Baoqin, Zhang Mingyue, Sun Junping
Journal of International Medical Research.2023; 51(1): 030006052211498. CrossRef
Malignant and Benign Tracheobronchial Neoplasms: Comprehensive Review with Radiologic, Bronchoscopic, and Pathologic Correlation
Francis Girvin, Alexander Phan, Sharon Steinberger, Eugene Shostak, Jamie Bessich, Fang Zhou, Alain Borczuk, Geraldine Brusca-Augello, Margaret Goldberg, Joanna Escalon
RadioGraphics.2023;[Epub] CrossRef
Clinicopathological Characteristics and Pathogenesis of Granular Cell Tumours of the Airways
Jesús Machuca-Aguado, Fernando Cózar-Bernal, Enrique Rodríguez-Zarco, Juan José Ríos-Martin, Miguel Ángel Idoate Gastearena
Journal of Bronchology & Interventional Pulmonology.2023; 30(4): 390. CrossRef
Treatment of primary tracheal schwannoma with endoscopic resection: A case report
Yong-Shuai Shen, Xiang-Dong Tian, Yi Pan, Hua Li
World Journal of Clinical Cases.2022; 10(28): 10279. CrossRef
Primary bronchial schwannoma: A case report
Yosuke Aoyama, Atsushi Miyamoto, Takeshi Fujii, Sakashi Fujimori, Meiyo Tamaoka, Daiya Takai
Medicine.2022; 101(40): e31062. CrossRef
Endobronchial schwannoma in adult: A case report
Touil Imen, Boudaya Mohamed Sadok, Aloui Raoudha, Souhir Ksissa, Brahem Yosra, Ben Attig Yosr, Ksontini Meriem, Bouchareb Soumaya, Keskes Boudawara Nadia, Boussoffara Leila, Knani Jalel
Respiratory Medicine Case Reports.2021; 33: 101396. CrossRef
Primary intratracheal schwannoma misdiagnosed as severe asthma in an adolescent: A case report
Hui-Rong Huang, Pei-Qiang Li, Yi-Xin Wan
World Journal of Clinical Cases.2021; 9(17): 4388. CrossRef
PD‐1/PD‐L1 negative schwannoma mimicking obstructive bronchial malignancy: A case report
Daibing Zhou, Xiaoyan Xing, Jie Fan, Youzhi Zhang, Jie Liu, Yi Gong
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Case report: A tracheobronchial schwannoma in a child
Li Zhang, Wen Tang, Qing-Shan Hong, Pei-feng Lv, Kui-Ming Jiang, Rui Du
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Recurrent transmural tracheal schwannoma resected by video-assisted thoracoscopic window resection
Huiguo Chen, Kai Zhang, Mingjun Bai, Haifeng Li, Jian Zhang, Lijia Gu, Weibin Wu
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Primary intratracheal schwannoma resected during bronchoscopy using argon plasma coagulation
Purva V Sharma, Yash B Jobanputra, Tatiana Perdomo Miquel, J Ryan Schroeder, Adam Wellikoff
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Abhijeet Singh, VallandramamR Pattabhiraman, Arjun Srinivasan, Sivaramakrishnan Mahadevan
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Shadi Hamouri, Nathan M. Novotny
Journal of Cardiothoracic Surgery.2017;[Epub] CrossRef
A Case of Primary Tracheal Schwannoma
Sung Min Choi, Ji Hong You, Sang Bae Lee, Seong Han Kim, Yon Soo Kim
Kosin Medical Journal.2017; 32(2): 258. CrossRef
Endobronchial Neurilemmoma Mimicking a Bronchial Polyp
Ryoung Eun Ko, Seung Yong Park, Yeong Hun Choe, So Ri Kim, Heung Bum Lee, Yong Chul Lee, Seoung Ju Park
Soonchunhyang Medical Science.2015; 21(2): 176. CrossRef
Optimal treatment for primary benign intratracheal schwannoma: A case report and review of the literature
XIAHUI GE, FENGFENG HAN, WENBIN GUAN, JINYUAN SUN, XUEJUN GUO
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Case Reports

Metaplastic Thymoma: Report of 4 Cases: Guhyun Kang, Nara Yoon, Joungho Han, Young Eun Kim, Tae Sung Kim, Kwhanmien Kim; Korean J Pathol. 2012;46(1):92-95. Published online February 23, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.1.92

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Abstract PDF

Metaplastic thymoma (MT), accepted in the World Health Organization 2004 scheme, is a circumscribed tumor of the thymus exhibiting biphasic morphology. We herein describe the clinicopathologic features of four MTs and the differential diagnoses of this unusual tumor. There were three women and one man with mean age of 49.5 years. The patients were found to have mediastinal masses, and underwent surgical excision. One exhibited symptoms of myasthenia gravis, and the serum titer for anti-acetylcholine receptor antibody was positive. Grossly, the tumors were encapsulated, and showed vaguely multinodular, solid, tan-white to yellow cut surfaces. Histologically, they comprised epithelial islands intertwining with bundles of delicate spindle cells. The patients remained well after surgical excision at 5-55 months. Because of the distinctive histological appearance and benign clinical course, MT should be distinguished from other more aggressive mediastinal neoplasms displaying biphasic feature.

Citations

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A Rare Case of Metaplastic Thymoma Presenting With Myasthenia Gravis
Ilianne Vega Prado, John Shymansky, Anisha Apte, Keith Mortman, Henry J. Kaminski, Stephanie Barak
International Journal of Surgical Pathology.2024; 32(1): 155. CrossRef
Thymic epithelial tumours: histopathological classification and differential diagnosis
Jan von der Thüsen
Histopathology.2024; 84(1): 196. CrossRef
Epigenetics of Thymic Epithelial Tumors
Vanessa Nicolì, Fabio Coppedè
Cancers.2023; 15(2): 360. CrossRef
Expanding the Clinicopathologic Spectrum of YAP1::MAML2–Rearranged Thymic Neoplasm
Eric Eunshik Kim, Ye Yoon Suh, Sang Won Lee, Jeong Mo Bae, Kyoungbun Lee, Sungyoung Lee, Hongseok Yun, Kyeong Cheon Jung, Jiwon Koh
Modern Pathology.2023; 36(2): 100048. CrossRef
Significance of YAP1–MAML2 rearrangement and GTF2I mutation in the diagnosis and differential diagnosis of metaplastic thymoma
Minghao Wang, Hongtao Xu, Qiang Han, Liang Wang
Annals of Medicine.2023;[Epub] CrossRef
Loss of YAP1 C‐terminus expression as an ancillary marker for metaplastic thymoma: a potential pitfall in detecting YAP1::MAML2 gene rearrangement
Xuan Wang, Lei‐lei Liu, Qing Li, Qiu‐yuan Xia, Rui Li, Sheng‐bing Ye, Ru‐song Zhang, Ru Fang, Hui Chen, Nan Wu, Qiu Rao
Histopathology.2023; 83(5): 798. CrossRef
A Case of Metaplastic Thymoma
Ryoichi TAKENAKA, Kenji NEZU, Daijiro TAKEMOTO, Tatsuya HAYASHI, Hisato YAMAMOTO, Shoichi MATSUKAGE
Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association).2023; 84(4): 538. CrossRef
Malignant Transformation of Metaplastic Thymoma into High-Grade Sarcomatoid Carcinoma: A Case Report
Zheng Hua Piao, Jin Ping Chen, Hai Ren Chen, Xin Cheng Zhou
International Journal of Surgical Pathology.2022; 30(5): 564. CrossRef
YAP1-MAML2 Fusion as a Diagnostic Biomarker for Metaplastic Thymoma
Jikai Zhao, Ruiying Zhao, Chan Xiang, Jinchen Shao, Lianying Guo, Yuchen Han
Frontiers in Oncology.2021;[Epub] CrossRef
Metaplastic thymoma: a distinctive thymic neoplasm characterized by YAP1-MAML2 gene fusions
Marina Vivero, Phani Davineni, Valentina Nardi, John K.C. Chan, Lynette M. Sholl
Modern Pathology.2020; 33(4): 560. CrossRef
Metaplastic thymoma: Report of two cases
Yoshikazu Shinohara, Mariko Tanaka, Kentaro Kitano, Kazuhiro Nagayama, Masaaki Sato, Jun Nakajima
The Journal of the Japanese Association for Chest Surgery.2020; 34(7): 733. CrossRef
Type AB thymoma is not a mixed tumor of type A and type B thymomas, but a distinct type of thymoma
Yukari Miki, Kana Hamada, Tadashi Yoshino, Katsuya Miyatani, Kiyoshi Takahashi
Virchows Archiv.2014; 464(6): 725. CrossRef
Potential Role of Adjuvant Radiation Therapy in Cervical Thymic Neoplasm Involving Thyroid Gland or Neck
Jae Myoung Noh, Sang Yun Ha, Yong Chan Ahn, Dongryul Oh, Seung Won Seol, Young Lyun Oh, Joungho Han
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A Case of Metaplastic Thymoma
Eiji MIYAHARA, Tomoko ITAGAKI, Masaki KUWAHARA, Akira KAMEDA, Yoshihiro MIYATA, Kazuhiro SENTANI, Wataru YASUI
Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association).2014; 75(2): 360. CrossRef

Diffuse Pulmonary Meningotheliomatosis: A Case Report.: Jungsuk An, Heejung Park, Joungho Han, Tae Sung Kim, Yong Soo Choi, Moon Seok Choi, Sang Won Um; Korean J Pathol. 2011;45:S32-S35.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.S1.S32

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Abstract PDF

Diffuse pulmonary meningotheliomatosis (DPM) is an extremely rare condition. We herein report a unique case of DPM in a 54-year-old woman with a previous history of hepatocellular carcinoma. A chest computed tomography showed diffuse bilateral nodular infiltration, suggesting miliary spread of metastatic hepatocellular carcinoma. The patient underwent a video-assisted thoracoscopic surgery for diagnostic purposes. The cut surface of the lung specimen showed multiple dispersed small nodules, consisting of variably sized nests or whorls of bland epithelioid cells often along the walls of alveolar septa or in a perivascular network within the alveolar interstitium. The tumor cells showed immunoreactivity for epithelial membrane antigen, vimentin, and progesterone receptor. DPM should be included in the differential diagnosis of diffuse multiple small nodules or a reticular pattern in the radiologic studies.

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Minute Pulmonary Meningothelial-Like Nodules Simulating Hematogenous Lung Metastasis: A Case Report
Sang Kook Lee, Gi Jeong Kim, Young Jae Kim, Ah Young Leem, Eu Dong Hwang, Se Kyu Kim, Joon Chang, Young Ae Kang, Song Yee Kim
Tuberculosis and Respiratory Diseases.2013; 75(2): 67. CrossRef

Thymofibrolipoma: A Brief Case Report.: Gu Hyun Kang, Joungho Han, Tae Sung Kim, Yong Soo Choi, Sang Won Um; Korean J Pathol. 2010;44(3):338-340.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.3.338

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Abstract PDF

Thymofibrolipoma is an extremely rare tumor in the anterior mediastinum, and represents a histologic variant of the usual thymolipoma. Herein, we report a case of thymofibrolipoma in a 9-year-old girl who had a huge mass with fatty attenuation in the right hemithorax on chest computed tomography. She denied any subjective symptoms except mild fever. The surgically resected tumor was ovoid, soft and well-encapsulated, measuring 9.0 x 7.5 x 7.0 cm. The cut surface was light tan in color with yellowish streaks. Microscopically, two distinct areas were admixed in different proportions. One consisted of normal thymic tissue with subinvoluted features and the other was composed of extensive areas of collagenous tissue interspersed in mature adipose tissue. In a high power view, there were thin strands of remnant thymic epithelial cells, separating the pseudolobules. Thymofibrolipoma should be distinguished from other benign or malignant conditions, occurring in the anterior mediastinum, so that unnecessary treatment can be avoided.

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Unusual thymoma subtypes
Michael A. den Bakker
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Thymofibrolipoma: a case report and review of the literature
Ryu Jokoji, Emiko Tomita
Diagnostic Pathology.2022;[Epub] CrossRef
Thymoangiolipoma: A rare histologic variant of thymolipoma in a patient with myasthenia gravis
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Rare Tumors.2020; 12: 203636132097921. CrossRef

Short Case Report

Squamous Cell Carcinoma Arising in a Thymic Cyst : A Brief Case Report.: Chang Ohk Sung, Joungho Han, Ji Yeon Kim, Young Mog Shim, Tae Sung Kim; Korean J Pathol. 2009;43(3):260-262.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.3.260

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Abstract PDF

We present here the case of a 73-year-old man with squamous cell carcinoma that arose in a thymic cyst, and this was incidentally found by chest radiography. Computed tomography revealed a 3.6 cm-sized predominantly cystic lesion with a mural nodule at the antero-superior mediastinum. The resected specimen was a well demarcated cystic mass with a solid mural nodule. Microscopically, the nodule was determined to be invasive squamous cell carcinoma that had originated from the benign squamous epithelium lining the thymic cyst.

Citations

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Multilocular Thymic Cyst with Prominent Lymphoid Follicular Hyperplasia: A Case Report
Na-Ra Yoon, Ji Yun Jeong, Joungho Han, Jhingook Kim, Chin A Yi
Journal of Lung Cancer.2012; 11(1): 45. CrossRef

Case Report

Mucous Gland Adenoma Presenting as a Peripheral Lung Mass: A Brief Case Report.: Ji Eun Kwon, Gou Young Kim, Joungho Han, Tae Sung Kim, Kwanmien Kim; Korean J Pathol. 2004;38(2):126-128.

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Abstract PDF: Mucous gland adenoma (MGA) of the lung is an uncommon, benign tumor that histologically resembles the mucus-secreting component of the tracheobronchial gland. The majority arises within the main, lobar or segmental bronchi. MGA presenting as a peripheral lung mass is extremely rare. We herein report a case of MGA that uniquely arose from the peripheral territory of the superior segmental bronchus of the left lower lobe in a 73-year-old male. Chest computed tomography showed a 13 mm-sized, subpleural nodule, which was easily enucleated by video-assisted thoracotomy. The mass was round and gray-tan in color with mucoid material. The tumor was composed of cysts, tubules, and glands lined by bland columnar, cuboidal or flattened, mucus secreting cells.

Original Article

Primary Signet Ring Cell Carcinoma with Widespreand Metastasis.: Nam Hoon Cho, Soon Hee Jung, Tae Sung Kim; Korean J Pathol. 1988;22(4):448-455.

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Abstract PDF: We present an autopsy case of signet ring cell carcinoma of urinary bladder which underwent widespread metastsis through nearly entire organ. The patient, 45-year old male, suffered from hematuria, dysuria and flank pain for 6 months. Under the diagnosis of the signet ring cell carcinoma by the cystoscopic biopsy, radical cystectomy and ileocutaneous ureteral division were performed. But he died after 11-months after the diagnosis. The autopsy confirmed the widespread metastasis at the lung, kidney, adrenal gland, parathyroid gland, heart, stomach, ileum, spine, rib and meninges. The preveously resected urinary bladder discolosed the well defined fungating mass at the dome and anterio-lateral portion without apparent evidence of the remnant of the urachus. Histologically, the signet ring cells were predominent and focally mucinous pool floating the signet ring cells was noted. We could find several foci of the well differentiated adenocarcinoma and poorly differentiated adenocarcinomas. The above findings may reflect that the origin of carcinoma may be from the multipotential transitional cell epithelium.

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