AB021. Primary diffuse large B-cell lymphoma of the central nervous system: role of imaging in a rare disease-a case report.

BACKGROUND: Primary diffuse large B-cell lymphoma (DLBCL) of the central nervous system (CNS) constitutes approximately 1-3% of primary CNS tumors. This rare CNS tumor presents diverse clinical manifestations and variable imaging characteristics, making its diagnosis challenging using radiological modalities alone. Recognizing the role of imaging in different stages of treatment and understanding the various imaging patterns and radiological features is crucial for timely diagnosis and appropriate therapeutic decision-making. CASE DESCRIPTION: A 62-year-old woman presented to our tertiary hospital with a 1-month history of left-sided headache and left hemiparesis. A computed tomography (CT) scan from a previous hospital revealed a space-occupying lesion in the right temporo-occipital region with signs of increased intracranial pressure but no evidence of hemorrhage or calcifications. Subsequent magnetic resonance imaging (MRI) demonstrated a solid intra-axial lesion in the right temporoparietooccipital region, which exhibited heterogeneous enhancement with diffusion restriction. The lesion appeared hypointense on T1-weighted and hyperintense on T2-fluid attenuated inversion recovery (T2-FLAIR) sequence, containing cystic components surrounded by edema and causing compression of the occipital horn of the right lateral ventricle without midline shift. Immunohistochemical analysis confirmed the diagnosis of high-grade DLCBL. The patient underwent surgical resection followed by chemotherapy. A follow-up MRI revealed a new lesion in the right temporoparietooccipital region, which had increased in size, suggestive of lymphoma recurrence. The variable radiological presentations of primary CNS lymphoma (PCNSL) can often mimic other pathologies, such as gliomas, infections, abscesses, and secondary lymphomas, making it a diagnostic challenge. The imaging findings in this case align with the typical features of PCNSL. Both initial and follow-up imaging played a crucial role in guiding therapeutic decisions and assessing treatment response. CONCLUSIONS: This case report underscores the importance of recognizing the imaging characteristics of primary DLBCL of the CNS. Timely and accurate diagnosis based on imaging patterns is essential for expediting therapeutic decisions and evaluating the efficacy of treatment interventions, ultimately improving patient outcomes.

AB027. Distinguishing oligodendroglioma from astrocytoma: a radiological case report.

BACKGROUND: Oligodendroglioma, the third most common glioma, accounts for 5% of primary brain tumors and around 20% of all glial neoplasms. It is a rare brain tumor that develops from glial cells called oligodendrocytes, which cover nerve cells. Oligodendroglioma is classified as an adult diffuse glioma in the fifth edition of the World Health Organization (WHO) Classification of Tumors of the Central Nervous System (CNS). Patients may present with cognitive impairment, aphasia, behavioral changes, and seizures. The symptoms at presentation are often related to the anatomic location of the tumor. CASE DESCRIPTION: A 55-year-old female presented with episodes of facial seizure with drooping on the right side of her face 4 months before coming to our hospital. Her seizures lasted around one minute, causing her to be unable to speak during the seizure. She also complained of chronic headaches in the last 1 year. She initially underwent a non-contrast computed tomography (CT) scan of the brain. The scans showed an isodense calcified mass on the perifalcine anterior left lobe with surrounding peritumoral edema. Magnetic resonance imaging (MRI) brain confirmed the presence of an intraaxial white matter mass involving the left frontal lobe. This tumor did not demonstrate any contrast enhancement. MRI findings were suggestive of a low-grade astrocytoma. Histopathological examination following craniotomy and tumor removal surgery confirmed the diagnosis of oligodendroglioma not otherwise specified (NOS) CNS WHO grade II. Molecular analysis revealed to be isocitrate dehydrogenase (IDH) wildtype, inconsistent with the classic molecular profile of oligodendroglioma. The patient underwent adjuvant radiotherapy following surgery. Subsequent follow-up assessments demonstrated stable disease with improvement in symptoms. CONCLUSIONS: Differentiating between oligodendroglioma and astrocytoma poses a significant challenge due to their overlapping clinical and radiological features, yet understanding their key differences is crucial for accurate diagnosis. On MRI, calcification strongly favors oligodendrogliomas, while T2/fluid-attenuated inversion recovery (FLAIR) mismatch sign favors astrocytoma. Only 50% of oligodendrogliomas appear to be contrast-enhanced. While oligodendrogliomas and astrocytomas share some similarities, careful consideration is essential for accurate differentiation, even though histopathological and molecular findings are the final determinants of diagnosis.

Endovascular embolization of Spetzler-Martin Grade I brain arteriovenous malformations: A case report on patient-centered neurointervention.

Brain arteriovenous malformations (AVM) present complex treatment decisions, particularly for low-grade AVM where surgical resection is often considered the standard. This case report emphasizes the importance of patient preferences and cultural considerations in selecting endovascular embolization over traditional surgical approaches for Spetzler-Martin Grade I AVM management, highlighting the evolving practice of patient-centered care in neurointervention. A 30-year-old male presented with recurrent seizures, characterized by a sudden onset of headache followed by speech arrest, without any preceding medical history of neurological deficits. Initial physical examination revealed no focal neurological deficits. Non-contrast computed tomography, magnetic resonance imaging, and magnetic resonance angiography suggested an AVM involving the cortical-subcortical regions of the left frontal lobe, measuring approximately 1.7 × 2.6 × 1.5 cm, fed by the left middle cerebral artery M3 segment, and draining into the superior sagittal sinus. Spetzler-Martin Grade I classification was confirmed via digital subtraction angiography. Given the patient's strong preference against invasive procedures, driven by personal and cultural beliefs, endovascular embolization was selected as the treatment strategy. Post-embolization, the patient showed marked symptomatic improvement with no evidence of residual AVM on follow-up imaging, and no postprocedure complications were reported. This case highlights the importance of considering patient preferences in AVM treatment planning, illustrating that endovascular embolization can be an effective and less invasive alternative to surgery in selected patients, reinforcing the need for personalized, patient-centered approaches in neurointerventional care.

Clinical presentation, management, and outcome of suspected central nervous system infections in Indonesia: a prospective cohort study.

BACKGROUND: Little is known about the etiology, clinical presentation, management, and outcome of central nervous system (CNS) infections in Indonesia, a country with a high burden of infectious diseases and a rising prevalence of HIV. METHODS: We included adult patients with suspected CNS infections at two referral hospitals in a prospective cohort between April 2019 and December 2021. Clinical, laboratory, and radiological assessments were standardized. We recorded initial and final diagnoses, treatments, and outcomes during 6 months of follow-up. RESULTS: Of 1051 patients screened, 793 were diagnosed with a CNS infection. Patients (median age 33 years, 62% male, 38% HIV-infected) presented a median of 14 days (IQR 7-30) after symptom onset, often with altered consciousness (63%), motor deficits (73%), and seizures (21%). Among HIV-uninfected patients, CNS tuberculosis (TB) was most common (60%), while viral (8%) and bacterial (4%) disease were uncommon. Among HIV-infected patients, cerebral toxoplasmosis (41%) was most common, followed by CNS TB (19%), neurosyphilis (15%), and cryptococcal meningitis (10%). A microbiologically confirmed diagnosis was achieved in 25% of cases, and initial diagnoses were revised in 46% of cases. In-hospital mortality was 30%, and at six months, 45% of patients had died, and 12% suffered from severe disability. Six-month mortality was associated with older age, HIV, and severe clinical, radiological and CSF markers at presentation. CONCLUSION: CNS infections in Indonesia are characterized by late presentation, severe disease, frequent HIV coinfection, low microbiological confirmation and high mortality. These findings highlight the need for earlier disease recognition, faster and more accurate diagnosis, and optimized treatment, coupled with wider efforts to improve the uptake of HIV services.

The relationship of vascular endothelial growth factor and osteopontin expression with 3-year progression-free survival of locally advanced nasopharyngeal cancer patients treated with platinum-based chemoradiation.

Introduction: The incidence of nasopharyngeal cancer (NPC) is high, with new cases accounting for 5.2% of all malignancies in Indonesia. Most cases are detected at an advanced stage, and recurrences are common. Vascular endothelial growth factor (VEGF) and osteopontin (OPN) are important markers in tumorigenesis that serve as prognostic predictors. This study aims to determine the correlation of VEGF and OPN expression with 3-year progression-free survival (PFS). Material and methods: This retrospective cohort study analyzed 155 patients with locally advanced NPC. Data were obtained from medical records between 2015 and 2017. The locally advanced sample of this disease that met the inclusion criteria was stained with H&E before being prepared in a paraffin block. Furthermore, the immunohistochemistry staining results for VEGF and OPN were observed with ImageJ 1.50i and calculated semi-quantitatively using the histoscore. Results: The 3-year PFS obtained was 39%, with a median of 23 months. Vascular endothelial growth factor expression was detected in 113 of 155 samples (72.9%), while positive OPN expression was discovered in 99 of 155 samples (63.8%). There was a correlation between VEGF (p = 0.747) and OPN expression (p = 0.584) and 3-year PFS. Positive VEGF and OPN expression in the subgroup of patients with stage IVB and N3 tumors was related to improved 3-year PFS (p < 0.05). This was similar to the positive VEGF expression in the subgroup of patients receiving neoadjuvant chemotherapy (p < 0.05). Conclusions: Vascular endothelial growth factor and OPN remained potential prognostic predictors in NPC. Patients with positive VEGF and OPN expression in N3, IVB, and neoadjuvant treatment had significantly improved 3-year PFS.

The Difference in the Cyclin D1 Expression in Advanced Stage Nasopharyngeal Cancer based on Treatment Response: A Retrospective Cohort Study.

BACKGROUND: nasopharyngeal cancer (NPC) is the most common type of head and neck cancer in Indonesia (28.4%). Reports showed that 18.9% of cases came with advanced stage. Chemotherapy play important role in advanced stage. However, patients with the same stage of the disease may have different treatment response, likely due to the different tumor biological characteristics. Cyclin D1 is a protein involved in the cell cycle, which will stimulate proliferation. This study aimed to examine the proportion of cyclin D1 in NPC and its association with treatment response. METHODS: a retrospective cohort study was conducted on advanced NPC patients that underwent chemotherapy at Cipto Mangunkusumo Hospital from 2015 until 2018. Cyclin D1 immunohistochemistry staining was done by antigen retrieval methods using the cyclin D1 NovocastraTM monoclonal antibody. The cyclin D1 expression was evaluated with h-score. Treatment response was reviewed based on the RECIST 1.1 criteria. RESULTS: fifteen subjects (48.4%) had a positive expression of cyclin D1. Higher proportion of cyclin D1 positive was found in responsive group compare with non-responsive group (66.7% vs. 33.3%, p = 0.032). Statistically significant difference in mean h-score was observed between the subjects who responded and those who did not respond (116.24 SD57.80 vs. 77.97 SD45.27, p = 0.048). CONCLUSION: this study suggests that a higher expression of cyclin D1 is associated with a good treatment response in NPC patients.

Undifferentiated Nasopharyngeal Carcinoma Presenting with Shoulder Mass.

Nasopharyngeal cancer (NPC) is the most common cancer among head and neck cancer that usually presented with unilateral neck mass. Unusual symptoms of NPC can lead us to diagnosis misleading and delayed definitive treatment. We present a case of NPC with bone metastasis in the shoulder. A 33-year-old female presented with right shoulder mass caused by undifferentiated carcinoma of unknown primary, based on biopsy of shoulder mass. After four months, she was complaining painless neck swelling, headache, and hearing impairment in the left ear. Bone MRI showed malignant bone tumour in the right humerus. Neck CT scan showed mass in the nasopharyngeal and bilateral lymphadenopathy. Biopsy in nasopharyngeal revealed undifferentiated carcinoma of nasopharyngeal cancer (WHO-3 type A). The patient was diagnosed as NPC stage IVb and thus was treated with palliative chemotherapy. After three cycles of cisplatin docetaxel, patient condition improved.

Presentation, etiology, and outcome of brain infections in an Indonesian hospital: A cohort study.

BACKGROUND: Little detailed knowledge is available regarding the etiology and outcome of CNS infection, particularly in HIV-infected individuals, in low-resource settings. METHODS: From January 2015 to April 2016, we prospectively included all adults with suspected CNS infection in a referral hospital in Jakarta, Indonesia. Systematic screening included HIV testing, CSF examination, and neuroimaging. RESULTS: A total of 274 patients with suspected CNS infection (median age 26 years) presented after a median of 14 days with headache (77%), fever (78%), seizures (27%), or loss of consciousness (71%). HIV coinfection was common (54%), mostly newly diagnosed (30%) and advanced (median CD4 cell count 30/µL). Diagnosis was established in 167 participants (65%), including definite tuberculous meningitis (TBM) (n = 44), probable TBM (n = 48), cerebral toxoplasmosis (n = 48), cryptococcal meningitis (n = 14), herpes simplex virus/varicella-zoster virus/cytomegalovirus encephalitis (n = 10), cerebral lymphoma (n = 1), neurosyphilis (n = 1), and mucormycosis (n = 1). In-hospital mortality was 32%; 6-month mortality was 57%. The remaining survivors had either moderate or severe disability (36%) according to Glasgow Outcome Scale. CONCLUSION: In this setting, patients with CNS infections present late with severe disease and often associated with advanced HIV infection. Tuberculosis, toxoplasmosis, and cryptococcosis are common. High mortality and long-term morbidity underline the need for service improvements and further study.