Shikang Qiu, Qiannan Wang, Huihui Jiang, Limin Feng
BACKGROUND: Immunohistochemistry (IHC) is widely used in the management of patients with cervical intraepithelial neoplasia (CIN) but still has many limitations in clinical practice. We analyzed the correlation of new biomarkers with the severity of CIN and follow-up outcomes in patients after conization to improve the management of patients with CIN. METHODS: IHC staining of Eag1 and p16/Ki-67 was performed on cervical tissue sections from 234 patients with suspected CIN2/3...
July 11, 2024: Diagnostic Pathology
Yin Lu, Yanlin Wen, Sha Feng, Wenting Huang
Microsecretory adenocarcinoma (MSA) is a new type of salivary gland neoplasm identified in the 2022 World Health Organization Classification of Head and Neck Tumour (Skalova et al., Head Neck Pathol 16:40-53, 2022) and is characterized by a unique set of histomorphologic and immunohistochemical features and a recurrent MEF2C::SS18 fusion. MSA was initially misdiagnosed as another salivary gland tumour due to its similar morphology; until recently, only fewer than 50 cases were reported. We present a case of MSA of the hard palate with diverse architectural growth patterns, bland cytological features, abundant basophilic intraluminal secretions and fibromyxoid stroma...
July 9, 2024: Diagnostic Pathology
Mengyan Wang, Yahui Cui, Jinchuan Shi, Jun Yan
BACKGROUND: Mycobacterium avium complex (MAC) is an uncommon clinical pathogen, especially in the central nervous system (CNS), and carries a poor prognosis. MAC infections commonly present as immune reconstitution disease (IRD) in HIV patients. Herein, we report a case of intracranial infection caused by MAC in an AIDS patient without disseminated MAC (DMAC) and immune reconstitution inflammatory syndrome (IRIS). CASE PRESENTATION: A 31-year-old HIV-positive male presented us with progressively worsening CNS symptoms, and neuroimaging revealed ring-enhancing lesions...
July 9, 2024: Diagnostic Pathology
Jin-Feng Wang, Chen Li, Jing-Yi Yang, Yue-Ling Wang, Jing Ji
BACKGROUND: Uterine sarcoma is a rare and heterogeneous gynecological malignancy characterized by aggressive progression and poor prognosis. The current study aimed to investigate the relationship between clinicopathological characteristics and the prognosis of uterine sarcoma in Chinese patients. METHODS: In this single-center retrospective study, we reviewed the medical records of 75 patients with histologically verified uterine sarcoma treated at the First Affiliated Hospital of Xi'an Jiaotong University between 2011 and 2020...
July 5, 2024: Diagnostic Pathology
Yan Xu, Li Ding, Chao Li, Bin Hua, Sha Wang, Junli Zhang, Cuicui Liu, Rongyun Guo, YongQiang Zhang
PURPOSE: Cutaneous metastasis (CM) accounts for 5-30% of patients with breast cancer (BC) and presents unfavorable response to treatment and poor prognosis. A better understanding of the molecular alterations involved in metastasis is essential, which would help identify diagnostic and efficacy biomarkers for CM. MATERIALS: We retrospectively reviewed a total of 13 patients with histological or cytological diagnosis of breast cancer and CM. Clinical information was extracted from the medical records...
July 5, 2024: Diagnostic Pathology
Naoko Shigeta, Tetsuya Isaka, Kyoko Ono, Mio Tanaka, Tomoyuki Yokose, Hiroyuki Adachi, Wataru Usuba, Hiroyuki Ito
BACKGROUND: Chordoma, a rare malignant tumor arising from notochordal tissue, usually occurs along the spinal axis. Only a few published reports of primary lung chordomas exist. Herein, we present a case of primary lung chordoma and discuss important considerations for diagnosing rare chordomas. CASE PRESENTATION: We report a case of primary lung chordoma in a 39-year-old male with a history of testicular mixed germ-cell tumor of yolk sac and teratoma. Computed tomography revealed slow-growing solid lesions in the left lower lobe...
July 3, 2024: Diagnostic Pathology
Ruirui Fan, Jie Gao
AIMS: Vitiligo is a chronic dermatological condition characterized by the progressive loss of melanocytes, for which traditional therapy has shown limited efficacy. This study aimed to establish a vitiligo model with easy operability, high repeatability, and stable depigmentation to provide a foundation for studying the pathogenesis and developing novel therapies for vitiligo. METHODS: (1) Establishing vitiligo model: Firstly, deliver B16F10 cells to the back skin of C57BL/6 J via intradermal injection (day 0), and the CD4 depletion antibody was injected intraperitoneally on day 4 and 10...
July 3, 2024: Diagnostic Pathology
Wenmei Ma, Zhiping Ma, Yi Shi, Xuelian Pang, Maiweilidan Yimingjiang, Zhe Dang, Wenli Cui, Renyong Lin, Wei Zhang
BACKGROUND: Cerebral echinococcosis is relatively rare, and it is important to distinguish cerebral cystic echinococcosis (CCE) from cerebral alveolar echinococcosis (CAE) in terms of pathological diagnosis. We aim to describe the different clinicopathological features among patients with CCE and CAE. METHODS: We collected 27 cases of cerebral echinococcosis which were diagnosed in the Department of Pathology of the First Affiliated Hospital of Xinjiang Medical University from January 1, 2012, to June 30, 2023...
July 1, 2024: Diagnostic Pathology
Shojiro Ichimata, Yukiko Hata, Kazuhiro Nomoto, Tsutomu Sato, Naoki Nishida
BACKGROUND: Waldenström's macroglobulinemia (WM) is defined as a lymphoplasmacytic lymphoma (LPL) involving the bone marrow (BM) with presence of IgM monoclonal protein, and comprises > 95% of all LPL cases. Rituximab-based regimens have been predominant in the management of WM. Infusion-related reactions (IRRs) are a primary concern with rituximab, although it is generally better tolerated with less toxicity than conventional anticancer agents. Here, we present an autopsy case of an elderly man who died suddenly after receiving the initial infusion of rituximab for WM/LPL...
June 28, 2024: Diagnostic Pathology
Sojung Lim, Jiwon Koh, Jeong Mo Bae, Hongseok Yun, Cheol Lee, Jin Ho Paik, Tae Min Kim, Yoon Kyung Jeon
BACKGROUND: Follicular lymphoma (FL) is characterized by t(14;18)(q32;q21) involving the IGH and BCL2 genes. However, 10-15% of FLs lack the BCL2 rearrangement. These BCL2-rearrangement-negative FLs are clinically, pathologically, and genetically heterogeneous. The biological behavior and histological transformation of such FLs are not adequately characterized. Here, we report the first case of t(14;18)-negative FL that rapidly progressed to plasmablastic lymphoma (PBL). CASE PRESENTATION: A previously healthy 51-year-old man presented with leg swelling...
June 22, 2024: Diagnostic Pathology
Flavia D'Angelo, Franck Monnien, Alexis Overs, Irvin Pem, Fanny Dor, Marine Abad, Sophie Felix, Zohair Selmani, Zaher Lakkis, Christophe Borg, Alexandre Doussot, Fréderic Bibeau, Chloé Molimard
BACKGROUND: HER2-targeted therapies have recently emerged as an option in the management of metastatic colorectal cancer (mCRC) overexpressing HER2. However, data regarding HER2 status in primary CRC and its corresponding liver metastases are limited, potentially influencing clinical decisions. Therefore, the aim of this study was to compare the HER2 status in primary CRC and paired liver metastases. METHODS: Patients with mCRC who were operated from their primary colorectal cancer and their corresponding synchronous or metachronous liver metastases, in the digestive surgery department of Besançon University Hospital, between April 1999 and October 2021, were included...
June 22, 2024: Diagnostic Pathology
Xiaoming Fan, Barry Breaux, Laura Leonards, Rusella Mirza
BACKGROUND: Pulmonary hamartomas are benign lung lesions. Histopathologically, pulmonary hamartoma is composed of varying amounts of mesenchymal elements, including chondroid tissue, mature adipose tissue, fibrous stroma, smooth muscle, and entrapped respiratory epithelium. Most pulmonary hamartoma cases are asymptomatic and found incidentally during imaging. They usually appear as well-circumscribed lesions with the largest dimension of less than 4 cm. Asymptomatic giant pulmonary hamartomas that more than 8 cm are rare...
June 22, 2024: Diagnostic Pathology
Levente Kuthi, Tamás Zombori, László Tiszlavicz, Fanni Hegedűs, Szintia Almási, Bence Baráth, Mohammed Almakrami, Mohammad Jamal Ej, Nikolett Barta, Zsuzsanna Ujfaludi, Tibor Pankotai, Adrienn Hajdu, József Furák, Anita Sejben
BACKGROUND: Human pulmonary dirofilariasis (HPD) is rare in Hungary, and it stems from Dirofilaria immitis, mainly transmitted through mosquito bites, with dogs as primary hosts. Despite its prevalence in veterinary settings, human cases are infrequent. Historically, Mediterranean countries report most HPD cases, but sporadic cases occur in temperate European regions. Radiologically, HPD often manifests in a non-specific manner, resembling pulmonary neoplasms, leading to unnecessary surgery and patient distress...
June 21, 2024: Diagnostic Pathology
Aiat Shaban Hemida, Mostafa Ahmed Hammam, Aya Ahmed Swilam, Wafaa Ahmed Shehata
BACKGROUND: Psoriasis is a disease of overactive immune system. OVOL1 and Filaggrin have been associated with many inflammatory skin lesions. To the best of our knowledge, the correlation between OVOL1 and Filaggrin in psoriasis was not previously investigated. This work aims to search the immunohistochemical expression and correlation between OVOL1 and Filaggrin in psoriasis. MATERIALS AND METHODS: Slides cut from paraffin blocks of 30 psoriasis cases and 30 control subjects were stained with OVOL1 and Filaggrin...
June 21, 2024: Diagnostic Pathology
Dilara Akhoundova, Stefanie Fischer, Joanna Triscott, Marika Lehner, Phillip Thienger, Sina Maletti, Muriel Jacquet, Dinda S H Lubis, Lukas Bubendorf, Wolfram Jochum, Mark A Rubin
BACKGROUND: Catenin (Cadherin-Associated Protein), Beta 1 (CTNNB1) genomic alterations are rare in prostate cancer (PCa). Gain-of-function mutations lead to overexpression of β-catenin, with consequent hyperactivation of the Wnt/β-catenin signaling pathway, implicated in PCa progression and treatment resistance. To date, successful targeted treatment options for Wnt/β-catenin - driven PCa are lacking. METHODS: We report a rare histologic transformation of a CTNNB1 (β-catenin) mutated metastatic castration resistant prostate cancer (mCRPC), clinically characterized by highly aggressive disease course...
June 21, 2024: Diagnostic Pathology
Yike Gao, Boju Pan, Hongbao Jia, Yang Zhang, Shu Wang, Yuming Wang, Sumei Zhang, Mei Li, Anqi Wang, Xiaoxi Wang, Kun Zhao, Zixin Zhang, Jian Sun, Dan Guo, Zhiyong Liang
BACKGROUND: Ovarian clear cell carcinoma (OCCC), well known for its chemoresistance to platinum-based chemotherapy, exhibited a good response in clinical trials of anti-PD-1/PD-L1 inhibitors. By assessing PD-L1 expression, we sought to determine the potential therapeutic benefit of PD-1/PD-L1 inhibitors in OCCC. METHODS AND RESULTS: The retrospective study included 152 individuals with OCCC between 2019 and 2022 at Peking Union Medical College Hospital. Paired tumors of primary versus recurrent lesions (17 pairs from 15 patients) or primary versus metastatic lesions (11 pairs from 9 patients) were also included...
June 15, 2024: Diagnostic Pathology
Sarah Obiedat, Khaled Murshed, Lajos Szabados, Khaled Al Rumaihi, Issam Al Bozom
Neuroendocrine carcinoma arising from the urachus is extremely rare. We describe a case of a 33-year-old gentleman who presented with hematuria and diagnosed to have a composite adenocarcinoma and small cell neuroendocrine carcinoma arising from the urachus. The patient also had widespread metastasis at the time of presentation, therefore, he was referred for chemotherapy. However, the disease showed progression despite treatment. Recognition of neuroendocrine carcinoma component in urachal tumors, although rare, is very essential as this histologic type carries poor prognosis with aggressive clinical outcome...
June 14, 2024: Diagnostic Pathology
Mateus José Dutra, Ana Lia Anbinder, Christyan Moretti Pereira, Beatriz Afonso Chiliti, André Caroli Rocha, Estela Kaminagakura
Intravascular papillary endothelial hyperplasia (IPEH) represents an uncommon reactive endothelial hyperplastic proliferation. A 46-year-old man experienced increased volume in the right maxilla, elevation of the nasal ala, and swelling of the hard palate with a reddish hue for 3 months. Computed tomography revealed an expansive hypodense region and cortical bone destruction associated with an impacted supernumerary tooth and an endodontically treated tooth. Under the differential diagnoses of a radicular cyst, dentigerous cyst, and ameloblastoma, an exploratory aspiration and incisional biopsy were performed...
June 12, 2024: Diagnostic Pathology
Jiabin Lai, Weike Kong, Qiangchang Fu, Zhaochang Jiang, Bohao Sun, Xin Ye, Jing Kong, Shumei Wei, Lifeng Jiang
BACKGROUND: Osteosarcoma is a bone tumor that is characterized by high malignancy and a high mortality rate, and that originates from primitive osteoblastic mesenchymal cells and is most common in rapidly growing long bones. PSMD14, also known as RPN11 or POH1, is a member of the JAMM isopeptidase family, which is able to remove the substrate protein ubiquitination label, thereby regulating the stability and function of the substrate protein. In this study, we explored the expression and potential biological significance of the PSMD14 deubiquitinating enzyme in osteosarcoma...
June 11, 2024: Diagnostic Pathology
Otto Jokelainen, Heidi Myllykangas, Katri Rajala, Jarkko Marttila, Reijo Sironen
BACKGROUND: Inflammatory rhabdomyoblastic tumors are relatively recently recognized soft tissue tumors with a low malignant potential. Here, we present a case of concurrent inflammatory rhabdomyoblastic tumor (IRMT), adrenal pheochromocytoma, and pulmonary hamartoma in a patient with neurofibromatosis type 1 (NF1). To our knowledge, this is the first time that this constellation of tumors has been described in the literature. CASE PRESENTATION: A female patient in her late 20s with known NF1 was diagnosed with an inflammatory rhabdomyoblastic tumor, pheochromocytoma, and pulmonary hamartoma in a short succession...
June 11, 2024: Diagnostic Pathology
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