ABSTRACT
Rhabdomyosarcoma (RMS) is the most common mesenchymal tumor in children and adolescents, with 10% of cases occurring in the orbits. RMS should be suspected whenever children present with rapidly progressing unilateral exophthalmos. Its symptoms depend on the lesion's origin and location. We report the clinical case of a 19-year-old male patient admitted to the hospital because of blurred vision and bulging eyes that gradually increased over several months. Magnetic resonance imaging showed a mass located mainly in the left orbit, pushing and deforming but not invading the eyeball. The lesion had grown into the left ethmoid sinus wall. The histopathological incisional biopsy results were with alveolar RMS.
ABSTRACT
Solitary fibrous tumor (SFT), previously termed hemangiopericytoma, is a rare primary intracranial tumor. SFT is classified into grades I, II, and III with different prognoses; grade III tumor has malignant characteristics with a high probability of recurrence and extracranial metastasis. We report the case of a 63-year-old female patient admitted to the Vietnam National Cancer Hospital with headache, dizziness, nausea, ataxia, and loss of balance. Computed tomography showed a markedly enhanced tumor, without calcification, located in the posterior fossa close to the tentorium cerebelli. No changes in the adjacent bone were seen. Magnetic resonance imaging revealed a lobular extra-axial tumor with prominent flow voids, a finding that has been seen frequently in these tumors. The tumor was resected following an initial diagnosis of SFT. Postoperative histology indicated a grade III SFT according to the World Health Organization 2021 classification. SFT is often misdiagnosed as meningioma, as they have some imaging features in common. However, we believe that there are some characteristic magnetic resonance imaging features that help to distinguish between these tumors, as well as playing an essential role in SFT grading and potentially guiding the best therapeutic decision.
