Clinicopathological significance of SOX9 and β-catenin expression in pre-neoadjuvant chemotherapy cases of osteosarcoma: molecular and immunohistochemical study.

The molecular pathogenesis of osteosarcoma (OS), the most frequent primary malignant bone tumor of all age groups, is still obscure. Since multidrug chemotherapeutic regimens were introduced in the 1970s, survival rates have been stationary. The Wnt-β-catenin signaling cascade and SOX9 have a significant contribution to skeletal growth, development, and tumorigenesis.

Prognostic value of microRNA-125a expression status in molecular groups of pediatric medulloblastoma.

Purpose: Medulloblastoma (MB) is the most common malignant pediatric brain tumor. Current treatment allows decent survival rates but often with life-long morbidity. Molecular classification provides a base for novel therapeutic approaches.

Effect of Nigella sativa seed administration on prevention of febrile neutropenia during chemotherapy among children with brain tumors.

Purpose: Seeds of Nigella sativa (NS) are used to combat various disease conditions through their antibacterial effects. To evaluate the seeds' potential, we studied their effect on the prevention of febrile neutropenia (FN) in children with brain tumors.

Methods: A randomized pretest-post-test control group study including 80 children (2-18 years) with brain tumors undergoing chemotherapy were equally allocated into two groups.

Diffusion-weighted MRI and in-phase/opposed-phase sequences in the assessment of bone tumors.

Purpose: To evaluate the role of diffusion-weighted apparent diffusion coefficient (ADC) and in-phase/opposed-phase sequences in the differentiation of benign and malignant osseous tumors.

Materials And Methods: At 1.5T, routine sequences were compared to diffusion-weighted and in-phase/opposed-phase in 63 patients.

Lymphadenopathy in a series of Egyptian pediatric patients and the role of pathology in the diagnostic workup.

Assessment of lymphadenopathy in children represents a diagnostic challenge because of the extensive differential diagnoses, including reactive and malignant conditions. Knowledge of the etiologic pattern of lymphadenopathy in a given geographical region is essential for making a confident diagnosis or for suspecting a disease. Hence, the present study was carried out to identify different etiologies of lymphadenopathy in children in our region and to assess parameters commonly associated with malignancy, with an emphasis on the role of pathology.