Neoplastic Nature Research Articles

Gestational trophoblastic disease: STR genotyping for precision diagnosis.

Gestational trophoblastic disease (GTD) encompasses a constellation of rare to common gynecologic conditions stemming from aberrant gestations with distinct genetic backgrounds and variable degrees of trophoblast proliferation of either neoplastic or non-neoplastic nature. GTD is categorized into hydatidiform moles and gestational trophoblastic neoplasms, and their clinical outcomes vary widely across different subtypes. Prompt and accurate diagnosis plays a pivotal role in the effective management and prognostication of patients. Short tandem repeats (STRs) are repetitive DNA sequences dispersed throughout the human genome and inherit a tremendous genetic polymorphism among individuals. Widely recognized for its applications in forensic identity and paternity testing, the relevance of STR genotyping in the diagnosis of GTD has emerged as an essential ancillary test in the classification and management of GTD of both non-neoplastic hydatidiform moles and gestational trophoblastic tumors. This review discusses fundamental principles, laboratory operation and diagnostic interpretations of STR genotyping in context of diagnosis and differential diagnosis of GTD. PubMed was searched for all references up to 2024. STR genotyping is the gold standard in the diagnosis and subclassification of hydatidiform moles and is an important application in diagnostic workup and risk stratifications of gestational trophoblastic tumors as well.

S100-positive stroma in salivary gland basal cell adenomas: a neoplastic component with CTNNB1 mutations.

Basal cell adenomas (BCAs) are benign epithelial tumors of the salivary gland, characterized by the proliferation of basaloid and luminal cells. In addition, a distinctive spindle cell stroma, that is immunohistochemically-positive for S100, is often observed in BCAs. Based on the ultrastructural findings, the S100-positive stroma was presumed to originate from neoplastic myoepithelial cells. However, immunohistochemical studies do not provide strong evidence supporting a myoepithelial origin, and the true nature of this stroma remains elusive. The aim of this study was to determine whether the S100-positive stroma was neoplastic through a molecular analysis. We selected 2 cases involving BCAs with at least one S100-positive stromal area within the tumor, measuring ≥ 0.2 × 0.2mm. CTNNB1 I35T mutations were detected in both tumors by Sanger sequencing. Two areas of S100-positive stroma from these two tumors were successfully dissected by manual microdissection using a stereomicroscope without contamination from the surrounding neoplastic bilayered epithelial cells. Because of the small number of dissected stromal cells, the mutation status of these two areas was analyzed using digital PCR, and CTNNB1 I35T mutations were detected in both. In conclusion, this study demonstrated that the S100-positive stroma of BCAs exhibits a neoplastic nature from a molecular perspective. While future studies are needed to confirm whether the S100-positive stroma originates from myoepithelial cells, BCAs morphologically display tricellular differentiation, with neoplastic spindle-shaped stromal cells along with a bilayered neoplastic epithelium.

Diagnosis of canine B-cell chronic lymphoid leukemia with a CD21 negative phenotype using the LT21 clone CD21 antibody in flow cytometry: a case report

BackgroundChronic lymphoid leukemia (CLL) is a hematological disorder characterized by the clonal expansion of small mature lymphocytes that accumulate in the blood and bone marrow. CLL can arise from B-, T-, or natural killer cell clones. The cytological evaluation of blood smears is often the simplest and least invasive method for diagnosing lymphoid leukemia. Immunophenotyping is used to further subclassify the type of lymphoid leukemia.Case presentationA 15-year-old, 4.4-kg spayed female Shih Tzu was presented to the veterinary medical teaching hospital of Kangwon National University. Despite having a normal appetite and activity level, cervical and inguinal lymph node enlargement was noted on physical examination. Complete blood count revealed severe leukocytosis, severe lymphocytosis, and monocytosis. Splenomegaly, hepatomegaly, and lymph node enlargement were detected on radiographic and ultrasonographic examination. Immunophenotyping was performed using peripheral blood mononuclear cells (PBMCs). The majority of lymphocytes exhibited the following profiles: CD3−CD79a− (97.5%), CD4−CD8− (98.6%), CD21−CD79a− (98.4%), CD34− (0.1%), CD45+ (99.6%), major histocompatibility complex class II+ (99.5%), and CD14− (0.5%). Based on the immunophenotyping results, possible differentials considered included the following: the majority of lymphocytes may be natural killer (NK) cell clones, plasma cell clones, or show aberrant expression or loss of CD21 marker due to the neoplastic nature of the cells. Further flow cytometry was performed using antibodies against CD3, CD5, CD94, and granzyme B. The combined results indicated that the predominant lymphocyte subset in the PBMCs was CD3−CD5−CD21−CD94−granzyme B−. To confirm monoclonality and exclude the aberrant loss of CD markers, a polymerase chain reaction for antigen receptor rearrangement (PARR) assay was conducted. The PARR assay, using DNA from blood and lymph node samples, showed B-cell monoclonality. Immunocytochemistry using PBMCs showed that the plasma cell marker Multiple Myeloma Oncogene 1 (MUM1) was not expressed. Therefore, the diagnosis was confirmed to be B-cell CLL.ConclusionImmunophenotyping can help subclassify the type of lymphoid leukemia; however, as tumor cells can show aberrant expression or loss of the CD21 marker, combining immunophenotyping with the PARR assay could yield a more accurate diagnosis.

Lip lift with advancement flap as nasal columella reconstruction

Basocellular carcinomas are characterized by their non-deep spread neoplastic nature. Although treatment typically proceeds without complication, excision in critical facial regions can lead to aesthetically undesirable defects. Furthermore, elderly patients often express aesthetic concerns, particularly regarding the thinning of the upper lip over time. This article presents the case of a 75-year-old patient with a basocellular carcinoma located on the tip of the nose, amidst a history of multiple neoplastic conditions. To address the defect, an inferiorly-based philtral advancement flap was employed, accompanied by a lip lift procedure, resulting in favorable aesthetic and functional outcomes.

Clinical and genetic profile of Chinese patients with indolent natural killer-cell lymphoproliferative disorder of the gastrointestinal tract

Indolent natural killer cell lymphoproliferative disorder of the gastrointestinal tract (iNKLPD-GI) is an uncommon, recently recognized lymphoid proliferation of mature NK cells primarily manifesting in the GI tract. Unlike NK/T lymphoma, iNKLPD-GI exhibits a rather indolent clinical course, underscoring the need for cautious management to prevent unnecessary interventions. However, clinical and molecular features of this entity have not been thoroughly understood. This study aimed to add more information to the current knowledge of this disease. Seven patients with iNKLPD-GI were included in our study. Clinical data included initial symptoms, endoscopic manifestations, pathological features, and therapies. Besides, next-generation sequencing was arranged to explore the underlying genetic mechanism of this disease. In our study, iNKLPD-GI in the urinary bladder was first identified. Edema of extremities (3, 42.8 %) was the most prevalent onset symptom which was reported for the first time. Pathological and immunohistological features were found to display the phenotype of NK cells. Unlike extranodal NK/T cell lymphoma, Epstein-Barr virus-encoded small RNA (EBER) were negative in all patients. Moreover, we found that two patients harbored JAK3 mutation. Apart from JAK3 K563_C565del previously reported in the literature, we discovered new JAK3 mutation sites. Other mutations including BRAF, KRAS, and SH2B3 were also identified. In conclusion, iNKLPD-GI was an indolent atypical NK-cell proliferation with diverse clinical characteristics. “Watch and wait” therapy was preferable to intense chemotherapy. Recurrent JAK3 mutation may be the underlying mechanism responsible for the neoplastic nature of the disease and may serve as a potential target for patients with severe symptoms.

Breast cancer diagnostics by the intelligent analysis of white blood cells’ interaction with target cancer cells using convolutional neural networks

Interaction of immune system and cancer cells plays a crucial role in defining the physical and chemical characteristics of the tumor microenvironment. Consequently, monitoring and analyzing these interactions may prove essential for cancer diagnosis and prognosis. While standard techniques assessing cellular interaction are technically complicated and usually expensive, engineering solutions can be employed to introduce novel methods and effective techniques. In this paper, we presented a new blood-based breast cancer hallmark for people suspected of breast tumor disease (BTD) by time-lapse microscopy imaging from the interaction between the patient’s blood and MDA-MB-231 breast cancer cell lines. The detection protocol is based on the quantifying invasion of the WBCs to the breast cancer cell line. Many cytological, molecular, and immunofluorescent assays were carried out to approve the hypothesis. Blood immune cells showed meaningful invasion patterns to breast cancer cell lines in reverse correlation by the cancerous stage of the patients. Hence, we believe that the immune system is cognizant of the neoplastic nature of breast tumor disease. To eliminate all the human-related limitations, a convolutional neural network (CNN) architecture was used for invasion recognition. The proposed CNN architecture showed an accuracy of approximately 86%, making it a reliable, fast, and easy way for intelligent detection of invasion patterns to decide on the tumor stage. Results made us present the hypothesis that people with more aggressive breast cancer tumors have less strong immune cells to invade cancer cells which could be a start in the clinical use of the cellular-based immune system for cancer investigation. As WBCs were isolated from the blood with no pre-processing, this method would shed new light as a simple complementary method for better clarification of tumor nature.

Classic Lesions of the Biliary Tree.

Abnormal findings in the biliary tree are frequently encountered in response to acute and chronic exposures to various compounds. The more common findings are described here in an overview of previous publications such as the INHAND Proliferative and Nonproliferative Lesions of the Rodent Liver and the Liver-Nonneoplastic Lesion Atlas NTP with comments regarding current considerations. This was presented at the 2023 Annual Meeting of the Society of Toxicologic Pathology. Histologic descriptions and some discussions regarding the pathogenesis of the various categories of non-neoplastic lesions in the biliary tree are presented. Discussions regarding the use of the term oval cell versus ductular reaction and the potentially neoplastic nature of cholangiofibrosis are presented in some detail.

Exploring the uncharted: adenoid cystic carcinoma nestled in temporal bone

BackgroundAdenoid cystic carcinoma is an uncommon malignancy primarily arising from salivary glands. An extremely rare site for adenoid cystic carcinoma is the skull base. We report a case of adenoid cystic carcinoma of skull base who presented with common complaints of pain and right ear discharge. The discussion is made with emphasis on imaging evaluation simulating infective etiology with adjacent skull base osteomyelitis. Careful observation of the imaging findings and further evaluation of the patient revealed the neoplastic nature of the lesion with the final diagnosis being adenoid cystic carcinoma.Case presentationA 40-year-old female presented to our department with complaints of pain and right ear discharge since 6 months with progressive, extensive facial swelling and facial nerve palsy. The patient had undergone modified radical mastoidectomy thrice, but the details were not available. On imaging, there was a heterogenous extensive lesion extending from scalp till upper cervical region with extensive destruction of skull base and intra-cranial extension. The possibilities of temporal bone squamous cell carcinoma and extensive skull base osteomyelitis were considered. Further the biopsy of the lesion revealed adenoid cystic carcinoma.ConclusionsExtensive lesions of the skull base can be of infective, neoplastic and inflammatory etiology. Distinguishing between these conditions is crucial, as they have similar imaging characteristics but require different management approaches. The presence of a lesion that displaces or destroys fascial planes, accompanied by solid mass-like enhancement, indicates a higher probability of a neoplastic origin rather than an infectious etiology. With squamous cell carcinoma being the most common neoplasm, adenoid cystic carcinoma of the skull base also needs to be understood due to its propensity for perineural spread and a high likelihood of recurrence.

Cytoplasmic PPARγ Significantly Correlates With P53 Immunohistochemical Expression and Tumor Size in Localized Tenosynovial Giant Cell Tumor.

Tenosynovial giant cell tumor (TGCT)is a monoarticular fibrohistiocytic benign or locally aggressive soft tissue tumor that originates from the synovium of joints, bursae, and tendon sheaths.It has an inflammatory neoplastic nature, with a clinical presentationranging from pain, swelling, stiffness, and limited range of movement to joint instability and blockage. Its uncommon incidence leads to a poorly understood pathogenesis. Localized formsof TGCT (LTGCT) can cause significant morbidity, interfere with daily patient activities, and decrease the patient's quality of life in challenging cases. This study aimed to investigate the immunohistochemical expression of PPARγ (peroxisome proliferator-activated receptor gamma) and P53 in LTGCT to understand the disease better and offer potential therapeutic targets. The study is cross-sectional, in which 27 LTGCT cases were collectedfrom the Pathology Department, Faculty of Medicine, Cairo University, Cairo, Egypt.Solitary and multiple LTGCT cases retrieved between January 2018 and December 2022 were included, and immunohistochemically stained with anti-PPARγ and P53 antibodies. The TGCT samples were excluded if they were insufficient for sectioning, processing, and interpretation, over-fixed, had process artifacts, or were of the diffuse TGCT type. Scoring of stain expression was performed by ImageJ (National Institutes of Health, Bethesda, MD) analysis using the threshold method and was expressed in percent area/high power field. Clinicopathological correlations were analyzed. All the 27 collected LTGCT cases were located in the small joints of patients' hands. Cases with solitary LGTCTs constituted 55.6%(n = 15), while 44.4% (n = 12) had multipleLTGCTs related to one affected site/case (e.g., multiple tumors in one finger). PPARγ was expressed in the cytoplasm of mononuclear and multinucleated tumor cells and foamy histiocytes, while P53 expression was mainly in mononuclear cells' nuclei. PPARγ significantly correlated with P53 expression (r = 0.9 and P = 0.000). PPARγ (r = 0.4 and P = 0.02) and P53 (r = 0.5 and P = 0.01) were positively correlated with tumor size. Only P53 expression was positively correlated with tumor multiplicity (r = 0.4 and P = 0.03). Using the receiver operating characteristic curve test, the P53 cutoff score detecting the multiplicity of TGCTs was ≥20.5%, with a 75% sensitivity and 80% specificity. PPARγ and P53 have a significant role in LTGCT growth, while P53 plays a role in tumor multiplicity. They can be possible targets in LTGCTs unfit for excision.

Synovial Chondromatosis of Right Knee: A Case Report

Abstract Synovial chondromatosis is a rare cartilaginous neoplasm that most commonly affects the knee joint. Histologically, it presents as a multinodular cartilaginous proliferation showing clusters of chondrocytes. These can be quite atypical, simulating chondrosarcoma. The lesion is usually self-limited but sometimes may exhibit a more aggressive clinical course characterized by multiple local recurrences. Chondrosarcomatous transformation in synovial chondromatosis is exceedingly rare but has been documented. Until recently, synovial chondromatosis was considered a reactive process. Recent cytogenetic studies have shown recurrent chromosomal abnormalities, especially involving chromosome6, therefore supporting a clonal, neoplastic nature of this intriguing lesion.

Enhancing Lung Cancer Care in Portugal: Bridging Gaps for Improved Patient Outcomes.

Lung cancer has the highest incidence and cancer-related mortality worldwide. In Portugal, it ranks as the fourth most common cancer, with nearly 6000 new cases being diagnosed every year. Lung cancer is the main cause of cancer-related death among males and the third cause of cancer-related death in females. Despite the globally accepted guidelines and recommendations for what would be the ideal path for a lung cancer patient, several challenges occur in real clinical management across the world. The recommendations emphasize the importance of adequate screening of high-risk individuals, a precise tumour biopsy, and an accurate final diagnosis to confirm the neoplastic nature of the nodule. A detailed histological classification of the lung tumour type and a comprehensive molecular characterization are of utmost importance for the selection of an efficacious and patient-directed therapeutic approach. However, in the context of the Portuguese clinical organization and the national healthcare system, there are still several gaps in the ideal pathway for a lung cancer patient, involving aspects ranging from the absence of a national lung cancer screening programme through difficulties in histological diagnosis and molecular characterization to challenges in therapeutic approaches. In this manuscript, we address the most relevant weaknesses, presenting several proposals for potential solutions to improve the management of lung cancer patients, helping to decisively improve their overall survival and quality of life.

‘Armed kyphoplasty’ with posterior stabilization avoids corpectomy in complex thoracolumbar spine fractures: a case series

BackgroundComplex thoracolumbar fractures require reduction and stabilization. Posterior instrumentation alone and standard cement augmentation may represent undertreatment, while corpectomy has significant morbidity. In a series of unstable thoracolumbar fractures, we...

Multiple myeloma in dogs: Use of the cell block technique as a new diagnostic tool.

The diagnosis of multiple myeloma (MM) in dogs may be challenging and complex. The cell blocks are a diagnostic technique that allows the characterization of neoplastic cells and, therefore, might help in the diagnosis of atypical MM. The objective of the present work is to describe three clinical cases in which the cell blocks and immunohistochemistry contributed to the definitive diagnosis of canine MM. Three dogs, one female and two males, with different clinical signs, were presented for consultation with anemia, hyperproteinemia with monoclonal gammopathy, and the presence of plasmacytosis in the bone marrow. Cytologic analysis of the spleen was performed in two dogs and was suggestive of the presence of lymphocytes or plasma cells of a neoplastic nature in one of the cases and plasma cell hyperplasia associated with extramedullary hematopoiesis in the other. Given the hypotheses of lymphoid neoplasms with a plasma cell phenotype, cell blocks from aspiration punctures were performed for immunohistochemical analysis with anti-CD3, CD20, CD79αcy, PAX5, and MUM1 antibodies. The results revealed positive staining for MUM1 in 80% of the cells in the spleen cell block and for CD20 and MUM1 in 70% of the cells in the bone marrow cell blocks, with negative staining for the other antibodies. The immunophenotyping results allowed the diagnosis of MM in the three cases and excluded other lymphoid neoplasms. This work reinforces the importance of using cell blocks in the diagnosis of neoplasms by demonstrating their potential to aid the diagnosis of MM.

Immunohistochemical expression of p53, ki-67, tenascin, and fibronectin in giant cell fibroma and traumatic fibroma of the oral mucosa

Objective: This study aimed to compare the immunoexpression of p53, ki-67, tenascin, and fibronectin between giant cell fibroma (GCF) and traumatic fibroma (TF), in order to explore a benign neoplastic or a reactive nature of GCF. Methods: A cross-sectional study was conducted. Samples of GCF and TF were retrieved from the files of Oral Pathology Service, matched by site and size. Immunohistochemistry for p53, ki-67, tenascin, and fibronectin was evaluated in the superficial and deep regions of the lesions using the Image J Software. The number of positive cells was determined for p53 and ki-67, and the positive area was established for tenascin and fibronectin. Statistical analysis was performed with Mann-Whitney and independent t-tests (p≤0.05).Results: Comparing to TF, GCF showed higher expression of p53 protein in superficial (p=0.009) and deep regions (p=0.027), as well as higher tenascin expression in deep regions (p=0.000). Ki-67 and fibronectin immunoexpression did not differ between GCF and TF (p>0.05). Conclusion: The results of the present study seem supportive of a benign neoplastic nature of GCF, rather than a reactive one, especially considering the p53 and tenascin expression. Further studies with larger samples and broader markers should confirm this hypothesis.

Nasal and sinonasal tumors formed by atypical adenomatous lesions arising in respiratory epithelial adenomatoid hamartoma/seromucinous hamartoma.

Two benign adenomatous lesions are commonly recognized within the sinonasal tract, namely respiratory epithelial adenomatoid hamartoma (REAH) and seromucinous hamartoma (SH). We present 10 hitherto unrecognized benign polypoid nasal and sinonasal tumoriform lesions having in average 3.6cm in largest dimension, which are histogenetically related to SH and REAH. In addition to typical structures of REAH and SH, these lesions contained an additional characteristic and slightly atypical adenomatous component, which we termed atypical sinonasal glands arising in SH (ASGSH). ASGSH often produced deep red colored secretion with peripheral clearing similar to that seen in thyroid follicles. In contrast to SH, ASGSH was endowed by both secretory and myoepithelial layers and had mostly angulated shapes with snout-like protrusions into the lumens. Both layers were formed by an irregular, disorganized, and often incomplete cell lining, which had slightly atypical cytological features without mitoses. In 3 cases, ASGSHs revealed sebaceous differentiation, and in 3 cases the stroma produced a well-differentiated cartilage. Neoplastic nature of ASGSH was supported by finding of various mutations as revealed by next generation sequencing in five cases. In two cases each, we found identical mutations in BRAF gene (Val600Glu), and RET gene (Arg912Trp), respectively and in one case FAT1 gene alteration (Pro1665Leu).

OP135 Machine Learning And Cancer Registry: Evaluation Of The Effectiveness Of Case Coding

IntroductionMachine learning (ML) algorithms are computational procedures that use pattern recognition and inference by learning from previously categorized documents to predict the category to which a new document belongs. The role of machine learning within cancer registries remains unclear given the lack of in-depth testing and guidance from health technology assessment (HTA) agencies. We evaluated the effectiveness of coding new cases through machine learning at the Integrated Cancer Registry.MethodsThe Integrated Cancer Registry covers the eastern area of Sicily in Italy, which has an annual average incidence of about 10,000 cases of malignant neoplasm. Potential new cancer cases were retrieved from pathology services and processed by pathologists who confirmed the neoplastic nature of supposed cases and specified the morphological type and location of the tumors. The current method involves identification by reading the free-text report when International Classification Diseases for Oncology information was not provided. We used the new Microsoft ML.Net Library, a framework developed in response to the challenge of facilitating machine learning pipeline utilization in large software applications. A total of 1,050,952 free-text pathology reports published from 2003 to 2018 were selected separately from all Sicilian pathology services and uploaded to machine learning software that explored eight binary classification algorithms.ResultsWe evaluated each algorithm’s performance by calculating metrics (the number of true positives, true negatives, false positives, and false negatives) from the classification procedure applied to the test dataset. The metrics used were accuracy, F1 score, and area under the receiver operating characteristic curve. With a test set of around 210,000 text diagnoses, each algorithm reached an F1 score of up to 95 percent.ConclusionsMachine learning algorithms capture relevant information about tumors from free-text pathology reports, optimizing the process and reducing waste. With the help of machine learning systems, cancer registries can provide more timely data for research and evaluation of all types of new cancer technologies (drugs, devices, radiology and radiotherapy equipment, diagnostic devices, robotic surgery, and vaccines).

Immunohistochemical Study of MDM2 Expression in Odontogenic Keratocyst andDentigerous Cyst

Introduction: Dentigerous cyst and odontogenic keratocyst (OKC) are two of the most common developmental odontogenic cysts. Different developmental mechanism and biological behavior of OKC is due to unknown factors inherent in the epithelium or enzymatic activity in the wall. P53 plays a role in determining the pathways for DNA repair، apoptosis، angiogenesis and genomic stability and is negatively confronted with the MDM2 oncoprotein. Aim of this study was to evaluate the expression of MDM2 as an important indicator of proliferation and cell cycle regulation in OKC and dentigerous cyst.
 Methods: In this descriptive-cross-sectional study، MDM2 expression in the suprabasal and basal epithelium regions of 15 samples from each of the dentigerous cysts and OKC was assessed using immunohistochemistry. Finally، the data were entered into the SPSS16 software and analyzed using the t-test.
 Results: MDM2 expression in the suprabasal and basal epithelium regions in OKC was higher than dentigerous cyst، but there was not seen a statically significant difference (P: 0.551)، (P: 0.825). The expression level of this marker in both groups in the suprabasal region was significantly higher than the basal region (P: 0.005)، (P: 0.004).
 Conclusion: Higher expression of MDM2 in OKC، especially in the suprabasal areas، could indicate a secondary role of this protein in the pathogenesis، growth and spread of this cyst and the proliferation، apoptosis and differentiation processes confirm the neoplastic nature and specific biological behavior of this lesion.

Concurrent PTEN and PDGFRB Alterations Characterize Storiform Collagenoma.

Storiform collagenoma is a rare mesenchymal skin tumor that is composed of thickened collagen bundles arranged in a characteristic storiform pattern with a relatively hypocellular CD34-positive spindle cell component. Storiform collagenoma is most often sporadic, but multiple lesions can occur in Cowden syndrome, which is characterized by germline alterations in PTEN (phosphatase and tensin homolog) on chromosome 10. Here, we investigated the molecular pathogenesis of storiform collagenoma using a targeted next-generation DNA sequencing platform, including 5 sporadic cases and one case associated with Cowden syndrome. Recurrent PTEN alterations were identified in all cases, with biallelic PTEN inactivation observed in the case associated with Cowden syndrome and one sporadic case. Unexpectedly, we also identified recurrent activating mutations in the platelet-derived growth factor receptor beta (PDGFRB) gene. This included a missense substitution in the D5 Ig-like domain of PDGFRB in the Cowden syndrome-associated case. In addition, we report missense alterations in the juxtamembrane domain of PDGFRB in 4 of 5 (80%) sporadic cases, including mutations that have been previously described in sporadic myofibroma and myopericytoma. Therefore, we confirm the neoplastic nature of storiform collagenoma, we expand the spectrum of reported PDGFRB alterations in mesenchymal tumors and we suggest a possible collaborative role for PTEN and PDGFRB in the pathogenesis of storiform collagenoma.

CYTOPATHOLOGIC DIAGNOSIS OF LIVER MASS LESION

Objective: The objective of the study is to categorize and establish the various cytological patterns of liver lesions. Methods: The present study was a hospital-based both retrospective and prospective study, on 504 patients with liver space-occupying lesions (SOLs) as USG/CT-guided fine needle aspiration cytology or biopsy was done and the smears or tissue was sent to the Department of Pathology, for 5 years between January 2018 and December 2022. Investigations done before the procedure was platelet count and plasma prothrombin time to know patients with bleeding tendencies. Under ultrasonography guidance, fine needle aspiration was performed on patients diagnosed for nodular or diffuse lesions of the liver. Results: Mean age of the study population was 58.53±12.62 years, 60.32% were male, 87.30% were Hindu, and 68.45% were rural. The most common complaint was pain abdomen 384 (76.19%) followed by jaundice 70 (13.89%). About 95.44% were neoplastic nature out of which 98.96% were malignant, out of which 83.61% were secondary. Out of 64 primary neoplastic lesions, maximum 98.44% were hepatocellular carcinoma. Out of 398 secondary neoplastic lesions, maximum 87.69% were metastatic carcinoma. Conclusion: We concluded that in any SOL, the screening of the liver is essential for early detection and long survival of cases.

Adenomatoid odontogenic tumor: True neoplasm vs hamartoma

Adenomatoid odontogenic tumor (AOT) is an uncommon benign epithelial odontogenic tumor frequently involving the maxillary anterior region. It presents as an encapsulated slow growing lesion displacing the roots of associated teeth. The histopathological findings are characteristic and aid in diagnosis of this entity. We present a case of a 28 year old female who developed an expansile swelling in the anterior maxillary region which was reported as an Adenomatoid Odontogenic Tumor (AOT) post-surgical excision. This article discusses the hamartomatous vs true neoplastic nature of AOT along with histopathological findings.