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Retroperitoneal synovial sarcoma is extremely rare, with only a few cases reported in the literature. The diagnosis is often made late, due to anatomical considerations, with common symptoms including low back pain and weight loss. Imaging is critical for diagnosis, often revealing a heterogenous mass with the “triple sign” and calcifications. The main differential diagnoses include liposarcoma, undifferentiated pleomorphic sarcoma and leiomyosarcoma. Surgical resection remains the treatment of choice, though it is not always feasible, which contributes to the poor prognosis. The presented case is a retroperitoneal synovial sarcoma in a 29 years old man with findings from ultrasound, computed tomography and magnetic resonance imaging.

A pituitary adenoma in the suprasellar region without involvement of the Sella turcica is uncommon, with few examples recorded in the literature. Imaging, particularly magnetic resonance imaging, is critical for diagnosis. Radiological features aid in distinguishing ectopic pituitary adenoma from other possible diagnoses, which include Rathke cleft cyst, suprasellar abscess, diabetes insipidus, suprasellar cellular infiltrate, and suprasellar tumors such as germinoma, craniopharyngioma, optic pathway glioma, suprasellar hemangioblastoma, and pituitary lymphoma. A 48-year-old lady with impaired visual acuity underwent an MRI, which revealed a suprasellar ectopic pituitary adenoma in contact with the pituitary stalk and optic chiasm.

Hydatid cyst, which is caused by the cestode echinococcus granulosus, is endemic in many countries around the world. Despite the frequency of this disease, no previous case of cerebral hydatid cyst with orbital extension has been reported, demonstrating the scarcity of this presentation. Cerebral hydatid cyst may be primary or secondary. Given to the nonspecifity of the clinical symptoms, cross sectional imaging, including CT and MRI, play an important role in the diagnosis by ruling out differential diagnoses, which are represented essentially by neoplastic and nonneoplastic intraparenchymal cysts as well as brain abscesses. Surgery remains the cornerstone treatment for cerebral and orbital hydatid cyst. In this article, we present the imaging findings of a patient with a primary cerebral hydatid cyst with orbital extension, and also the radiological features that could eliminate other differential diagnoses.

We report an uncommon case of primitive neuroectodermal tumor/ Ewing's sarcoma of the lumbar and sacral nerve plexus in a 17years old boy who presented with an intense pain in the lower back radiating to legs. Magnetic resonance imaging showed a soft tissue mass with thickening of lumbar and sacral spinal nerve roots (L5-S3 level), along with widening of the corresponding foramina. There was also posterior scalloping of L5/S1 vertebrae and invasion of the sacral bone. A Partial resection has been performed, and the ensuing histopathology confirmed the diagnosis of PNET/Ewing's sarcoma. MRI in conjunction with histopathology are the key to narrow down the differential diagnoses list. PNET of lumbosacral area remain scarce, and only few cases have been reported nowadays. Given to the aggressivity of these tumors, the prognosis is poor despite appropriate treatment.

Carotydinia, also called transient perivascular inflammation of the carotid artery (TIPIC) is a rare diagnostic entity related to an inflammation over the carotid bifurcation region. Despite the confusion about the definition of this term, neck pain remains the main symptom. Several articles revealed the relevance of imaging in the diagnosis of this disease. We report magnetic resonance and ultrasound images of a case with carotydinia, and also the elements that could eliminate differential diagnoses.