Xanthogranulomatous Osteomyelitis Presenting as a Subacute Infectious Condition in the Fibula of a Young Female

Xanthogranulomatous osteomyelitis is a rare, chronic inflammatory disease characterized by infiltrating lipidized histiocytes, lymphocytes, and plasma cells. Xanthogranulomatous osteomyelitis commonly presents as a mass-like lesion on imaging and may be mistaken for a tumor. Here, we describe an unusual manifestation of xanthogranulomatous osteomyelitis with imaging findings resembling those of Brodie’s abscess, posing a diagnostic challenge in a child. Additionally, we suggest a potential correlation between xanthogranulomatous osteomyelitis and a history of prior trauma.

Combined Intramedullary and Intradural Extramedullary Solitary Fibrous Tumor in Cervical Spine

We present a rare case of solitary fibrous tumor (SFT) located in the intramedullary (IM) and intradural extramedullary sites of cervical spine, mimicking thrombosed aneurysm and meningioma. Herein, we present a case of spinal intradural SFT in a 59-year-old woman. She presented to the outpatient clinic with a right-sided motor weakness for over a year. The case was initially misinterpreted as a thrombosed aneurysm of the posterior spinal artery. Cervical spine magnetic resonance imaging revealed a well-circumscribed intradural mass with isosignal intensity on T1 and T2-weighted images with markedly T2 dark signal focus and homogenous intense enhancement at the level of C6. Computed tomography showed a slightly high-density mass without evidence of calcification or cystic component. Surgical removal was performed. However, due to combined IM component with adhesion, incomplete tumor resection was done. Pathologic analysis revealed hypocellular spindle cells with a thick collagenous stroma and immunohistochemical staining confirmed SFT. Spinal intradural SFT is a rare spindle cell tumor. Radiologists should consider SFT as a differential diagnosis if T2-weighted imaging shows an intradural located mass with markedly dark signal intensity focus.

Extradural Spinal Lymphoplasmacyte-Rich Meningioma in the Thoracic Spine: A Case Report and Literature Review

Most spinal meningiomas have an intradural or partly extradural location. The meningothelial origin is the most common pathologic type of spinal meningioma. Pure extradural spinal meningiomas are not common, and lymphoplasmacyte-rich meningioma (LPRM) is very rare. We report a case of isolated extradural spinal meningioma in the thoracic spine that was pathologically confirmed as LPRM.

Early Imaging Findings of Hypertrophic Osteoarthropathy Mimicking Bone Metastasis from Extrathoracic Malignancy

Hypertrophic osteoarthropathy (HOA) is a syndrome characterized by digital clubbing, periosteal bone formation, and synovial effusions. Secondary HOA is associated with intrathoracic malignancy in most cases; however, in rare cases, HOA can be caused by extrathoracic conditions. We report early ultrasound, computed tomography, magnetic resonance imaging, and bone scintigraphy findings of HOA in a patient with breast cancer. Its ambiguous clinical and imaging findings that mimicked malignant conditions are particularly interesting and informative.

Ultrasonography-guided intra-articular steroid injection in the hip for symptomatic round ligament partial tear or degeneration

Purpose@#The objectives of this study were to demonstrate the benefits of ultrasonography-guided intra-articular steroid injection in the hip (UISIH) for the treatment of partial tear or degeneration of the round ligament of the femur and to determine the prognostic factors for this treatment. @*Methods@#We retrospectively analyzed the records of 40 patients who were diagnosed with a partial tear or degeneration of the round ligament of the femur and who underwent UISIH between August 2014 and November 2018. The inclusion criteria were a lack of history of UISIH or other interventional procedure and the presence of follow-up records after the hip injection. The short-term clinical outcome was evaluated at the first follow-up appointment after UISIH. Possible prognostic factors for UISIH such as age, sex, injection side, and average follow-up time were analyzed using the chi-square test, the Fisher exact test, and the t test. @*Results@#UISIH was found to have been effective in 35 of the 40 patients (87.5%) at the first follow-up visit. The average follow-up time was 43 days. No significant differences were observed in the clinical outcome of UISIH with respect to age, sex, injection side, or follow-up time. @*Conclusion@#In this study, we demonstrated that UISIH was a safe and effective treatment in patients with a partial tear or degeneration of the round ligament of the femur over the course of short-term follow-up. Age, sex, injection side, and follow-up time were not identified as prognostic factors for this treatment.