{"title":"A Rare Presentation of Intracerebellar Schwannoma: A Case Report.","authors":"Mohamed Alhantoobi, Nadeen Alkhoori, Hassan Khayat, Euan Zhang, Almunder Algird, John Provias","doi":"10.1155/2024/8678186","DOIUrl":"https://doi.org/10.1155/2024/8678186","url":null,"abstract":"<p><p><b>Background:</b> Intracerebellar schwannoma is an extremely rare disease entity with only 21 case reports described in the literature. <b>Case Description:</b> A 68-year-old male presented with chronic headaches, dizziness, gait imbalance, and incoordination. Previous MRI had revealed a cystic lesion in the right cerebellum; however, patient was lost to follow-up. Updated MRI revealed dramatic enlargement of the lesion in addition to worsening clinical status. The patient underwent successful surgical resection. <b>Conclusion:</b> Intracerebellar schwannoma can be challenging to diagnose preoperatively due to its rare occurrence; however, it should be included in the differential diagnosis of cystic lesions in the cerebellum, and most cases can be successfully treated with complete surgical resection. Pathological examination revealed a spindle cell neoplasm with other typical histopathological features of schwannoma.</p>","PeriodicalId":45638,"journal":{"name":"Case Reports in Pathology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11498982/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142510130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An Autopsy Case of Fulminant Systemic Infection of <i>Clostridium perfringens</i> With a Diverse Role of Toxins in a Healthy Patient.","authors":"Ayano Osamura, Hiromi Onizuka, Kenta Masui, Kumiko Murakami, Tomoko Yamamoto, Yoji Nagashima, Munekazu Takeda, Atsushi Kurata","doi":"10.1155/2024/9213132","DOIUrl":"10.1155/2024/9213132","url":null,"abstract":"<p><p>We herein report an autopsy case of a fulminant <i>Clostridium perfringens</i> (<i>C. perfringens</i> or Welch bacilli) infection in a healthy adult. A 72-year-old, immunocompetent man visited the emergency department with lower back pain, and blood test revealed hemolytic attack. His condition rapidly worsened with severe acidosis and anemia, and he died despite symptomatic treatment. An autopsy examination demonstrated an abscess with necrosis and air spaces in the right lobe of his liver. Numerous Gram-positive bacilli were seen in the liver and bone marrow, and <i>C. perfringens</i> was identified in culture of the antemortem blood sample. Of note, a mucosal epithelium of the ileum showed loss of tight junctions (claudin 4), suggesting the involvement of <i>C. perfringens</i> toxins with its systemic spreading. Welch toxins were suggested to be involved in serious pathological conditions such as hemolytic anemia and systemic infections, and it is necessary to raise Welch infection as one of the differential diagnoses for fulminant systemic infections even in healthy individuals.</p>","PeriodicalId":45638,"journal":{"name":"Case Reports in Pathology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11416167/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142298189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Rare Pathology Case Report: Low-Grade Endometrial Stromal Sarcoma Forming Sex Cord- and Endometrioid Gland-Like Differentiation in Metastatic Foci.","authors":"Haneen Al-Maghrabi, Ghadeer Mokhtar, Jaudah Al-Maghrabi","doi":"10.1155/2024/4073869","DOIUrl":"https://doi.org/10.1155/2024/4073869","url":null,"abstract":"<p><p>Low-grade endometrial stromal sarcomas (LGESSs) are indolent tumors with a slow progression rate that tend to recur locally. They represent up to 10% of all primary sarcomas of the uterus and endometrium and only 0.2% of all genital tract tumors. They are commonly present in a younger demographic compared to other uterine tumors, with patients' ages typically between 42 and 58 years old. Although the overall 5-year survival rate is excellent, it has a natural history of delayed metastases which may manifest even decades after the disease was first diagnosed. They typically present as poorly defined lesions infiltrating the myometrium, along with extensive engagement of surrounding vascular structures. LGESS may display variants of different morphologies such as smooth muscle, fibromyxoid, sex cord-like, and endometrioid-type gland differentiation. These variations can pose a diagnostic challenge. The occurrence of this differentiation in a metastatic focus rather than in the primary tumor is seldom recorded in the literature. We present a case of a 51-year-old lady with a history of LGESS who was treated with surgery and radiotherapy and then presented after 12 years with an inferior vena cava (IVC) mass, which was confirmed histologically to be metastatic LGESS. Immunohistochemistry studies reveal strong positivity for CD10, WT1, and PR. These markers were negative in the sex cord and endometrioid gland-like differentiation counterparts. The patient had her initial follow-up appointment after the IVC mass resection, and she was in good health with no complications. To the best of our knowledge, this case represents a unique instance of metastatic LGESS exhibiting both sex cord and endometrioid gland-like differentiation that has not been observed in the primary tumor.</p>","PeriodicalId":45638,"journal":{"name":"Case Reports in Pathology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11390231/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142298190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nasopharyngeal Carcinoma: Connecting Antemortem and Postmortem Findings to Highlight a Rare Case of EBV and HPV Negativity.","authors":"Thomas Auen, Geoffrey Talmon","doi":"10.1155/2024/8881912","DOIUrl":"10.1155/2024/8881912","url":null,"abstract":"<p><p>Nasopharyngeal carcinoma is an endemic entity with a strong association with Epstein-Barr virus and a new recognition of human papilloma virus-mediated effects in nonendemic areas. Here, we discuss a nasopharyngeal carcinoma suspected as based on imaging results with metastasis to the lymph nodes, lung, spleen, bone, and liver. Gross and microscopic findings from the autopsy were clinicopathologically correlated with antemortem clinical studies and investigations. The authors report a case of EBV- and HPV-negative nonendemic, multisite metastatic nasopharyngeal carcinoma, shown to be nonkeratinizing undifferentiated subtype.</p>","PeriodicalId":45638,"journal":{"name":"Case Reports in Pathology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11221976/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141499299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Central Neurocytoma in a Teenager, a Rare Cause of Hemiplegia, and a Diagnostic Dilemma in a Resource-Poor Setting","authors":"Kofi Ulzen-Appiah, K. Akakpo","doi":"10.1155/2024/4514981","DOIUrl":"https://doi.org/10.1155/2024/4514981","url":null,"abstract":"Background. Central neurocytoma is a benign intraventricular neuroectodermal tumor most often arising in the lateral ventricles. Due to the location of this tumor, common signs and symptoms include obstructive hydrocephalus, recurrent headache, visual impairment, nausea, and vomiting. Central neurocytoma and intraventricular oligodendroglioma share similar gross features and cellular and architectural morphology, which may pose a diagnostic challenge in a poor resource setting. Immunohistochemical neuronal stains are useful for the two tumors in our setting. Report. An 18-year-old male patient presented with a 1-year history of right-sided weakness, recurrent seizures, and sudden loss of consciousness. The patient showed signs of increased intracranial pressure, but an antemortem CT or MRI scan could not be done to determine the underlying cause, due to lack of availability and poor prognosis of the patient at the time of presentation. An autopsy revealed a well-demarcated solid cystic, gritty intraventricular tumor causing obstructive hydrocephalus, with associated dilated ventricles and severe cerebral edema. Postmortem histopathological examination of the tumor confirmed central neurocytoma. Conclusion. Central neurocytoma (CN) is an uncommon cause of intracranial space occupying lesion (ICSOL) in the teenage age group in our setting. Central neurocytoma and intraventricular oligodendroglioma share similar radiologic and histomorphological features. Immunohistochemical evaluation with neuronal markers is essential in these two tumors, as they have different prognoses and surgical and treatment outcomes.","PeriodicalId":45638,"journal":{"name":"Case Reports in Pathology","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140264435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Mwazha, Nondabula Moyeni, Zuzile Zikalala, G. Nhlonzi
{"title":"Solitary Fibrous Tumor of the Central Nervous System: A Report of Two Cases with Emphasis on Diagnostic Pitfalls","authors":"A. Mwazha, Nondabula Moyeni, Zuzile Zikalala, G. Nhlonzi","doi":"10.1155/2024/3467025","DOIUrl":"https://doi.org/10.1155/2024/3467025","url":null,"abstract":"Solitary fibrous tumor (SFT) is a rare primary central nervous system neoplasm that usually presents as a dural-based mass. Awareness of the entity is limited by the rarity of the tumor which renders it prone to misdiagnosis. We present two cases of SFT located in the right parafalx and intraventricular region. The cases were classified as WHO grade 1 and grade 2, respectively. The present study discusses the radiological, histomorphological, and immunohistochemical features of SFT, with emphasis on potential diagnostic pitfalls that may lead to erroneous diagnosis.","PeriodicalId":45638,"journal":{"name":"Case Reports in Pathology","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139443049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nourah Al-Oudah, Sara Alanazi, Sarah Saad Alotaibi, Nayef Alzahrani
{"title":"Primary Synovial Sarcoma of the Scrotum","authors":"Nourah Al-Oudah, Sara Alanazi, Sarah Saad Alotaibi, Nayef Alzahrani","doi":"10.1155/2023/7839846","DOIUrl":"https://doi.org/10.1155/2023/7839846","url":null,"abstract":"The report outlines a case of synovial sarcoma in the scrotal region. A 36-year-old male presented with a scrotal swelling. The lesion was completely resected, whereas the histopathologic examination revealed a spindle cell tumor. The tumor stained positive for pancytokeratin, AE1/AE3, epithelial membrane antigen (EMA), TLE-1, CD99, and BCL-2. The cytogenetic testing showed a chromosomal translocation in the SS18 gene at 18q11.2, consistent with the diagnosis of primary synovial sarcoma. A year later, the patient developed liver, vertebrae, and lung metastasis, which was treated with systemic chemotherapy. Treatment failed to improve the hepatic lesion that was then resected, while the spine and lung lesions were followed by radiotherapy. The patient is now alive and subject to an outstanding follow-up.","PeriodicalId":45638,"journal":{"name":"Case Reports in Pathology","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139145242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Steven H Adams, Erinn Luo, Daniel Lozeau, Xiaoyun Wen
{"title":"A Case Report of Primary Malignant Melanoma of the Gallbladder with Multiple Metastases.","authors":"Steven H Adams, Erinn Luo, Daniel Lozeau, Xiaoyun Wen","doi":"10.1155/2023/4847053","DOIUrl":"10.1155/2023/4847053","url":null,"abstract":"<p><p>Primary malignant melanoma of the gallbladder is an extremely rare tumor with approximately 39 cases described in the literature so far. However, since the first case was reported in 1907, it remains controversial whether gallbladder involvement in malignant melanoma is primary or metastatic. Here, we report a case of primary malignant melanoma of the gallbladder. A 52-year-old male presented to the emergency department with right upper quadrant abdominal pain and was found to have tumefactive sludge filling the majority of the gallbladder with possible gallbladder wall thickening on ultrasonography. A laparoscopic cholecystectomy was performed for presumed acute cholecystitis. Histopathologic examination of the gallbladder revealed malignant melanoma arising from the mucosa of the gallbladder. Further clinical investigation excluded other primary sites, supporting a diagnosis of primary malignant melanoma of the gallbladder.</p>","PeriodicalId":45638,"journal":{"name":"Case Reports in Pathology","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10730246/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138811839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Evan R. J. Goyette, N. Georgantzoglou, Darcy A. Kerr, Yvonne Cheung, Eric R. Henderson, Konstantinos Linos
{"title":"Pathologic Femur Fracture in an Immunocompetent Healthy Young Adult due to Acute Osteomyelitis","authors":"Evan R. J. Goyette, N. Georgantzoglou, Darcy A. Kerr, Yvonne Cheung, Eric R. Henderson, Konstantinos Linos","doi":"10.1155/2023/6279174","DOIUrl":"https://doi.org/10.1155/2023/6279174","url":null,"abstract":"An immunocompetent 33-year-old woman presented with a pathologic femur fracture after one month of progressively worsening right thigh pain. Open biopsy demonstrated acute suppurative osteomyelitis despite the lack of clinical risk factors. The polymicrobial infection was successfully treated with three operative procedures and culture-specific antibiotic agents. Acute osteomyelitis, while an uncommon cause of pathologic fracture, must always be on the differential diagnosis, even when no obvious predisposing factors are present. When investigating for an infectious etiology in cases such as our own, considering immunodeficiency syndromes alongside the more typical causes of osteomyelitis is encouraged.","PeriodicalId":45638,"journal":{"name":"Case Reports in Pathology","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138603246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Clinicopathological Analysis of Bronchiolar Adenoma Lined Purely by Mucinous Luminal Cells.","authors":"Guangjie Liao, Xinke Zhang","doi":"10.1155/2023/5566499","DOIUrl":"10.1155/2023/5566499","url":null,"abstract":"<p><p>Bronchiolar adenoma (BA) is a rare lung tumor that has recently been clearly named, including the previous ciliated muconodular papillary tumor (CMPT) and the so-called nonclassical CMPT. The most prominent histological feature of BA is a double-layer cell structure composed of a continuous basal cell layer and a luminal cell layer. BA lined purely by mucinous luminal cells is very rare, and only one case has been reported in the English literature. This type of BA can easily be misdiagnosed as early mucinous adenocarcinoma. This article analyzes the clinicopathological characteristics of a newly discovered case of BA lined purely by mucinous luminal cells and fully integrated with the literatures.</p>","PeriodicalId":45638,"journal":{"name":"Case Reports in Pathology","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10630002/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71522908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}