Undifferentiated embryonal sarcoma of liver: Paradoxical imaging appearance.

Undifferentiated embryonal sarcoma of the liver is a rare entity. It is a malignant primitive mesenchymal tumor seen in the pediatric age group often between 6 to 10 years of age. It involves the right lobe of the liver commonly and is usually asymptomatic. Acute presentation in these cases is secondary to its rupture/ wall dehiscence. Alfa fetoprotein, a tumor marker elevated in most of the hepatic malignant tumors is however normal in undifferentiated embryonal sarcoma. Imaging wise it is a large encapsulated multiseptated lesion. It shows a "paradoxical appearance" with a predominantly solid appearance on ultrasonography and cystic appearance on CT/MRI. This is a peculiar feature that can help in the early diagnosis of this entity. Besides, normal serum alfa fetoprotein levels favor its diagnosis. Hereby we present a case of a 5-year-old female child, presented with complaints of acute onset abdominal pain and distension which on imaging investigation showed a liver mass with typical paradoxical appearance on ultrasonography, CT and MRI as described.

MRI findings in intraosseous extension of calcific supraspinatus tendonitis.

Calcific Tendinitis is a condition characterized by abnormal deposition of hydroxyapatite crystals in the tendons with secondary inflammation. However, complication like intraosseous migration is rare. Hereby we present a case of 58-year-old female patient who presented with pain in the right shoulder along with restricted movements. The MRI scan revealed features of intraosseous migration of calcification in addition to the detailed evaluation of calcific tendinitis. Furthermore, the patient was treated with ultrasound guided aspiration & percutaneous irrigation post which the pain subsided indicating promising therapeutic role of ultrasonography in such cases. Thus multimodality approach can help in complete diagnosis & treatment of this condition.

Primary ovarian leiomyoma: Imaging in a rare entity.

Primary ovarian leiomyoma is a very rare benign mesenchymal tumor arising from the smooth muscle of walls of ovarian blood vessels. It is usually seen between 20 65 years of age. Being asymptomatic in many patients, these are incidentally detected. Ultrasonography and magnetic resonance imaging are preferred modality while imaging these lesions. Hereby we present a case of a 35-year-old female with incidentally detected right ovarian mass lesion which was hypointense on ultrasonography, hypointense on both T1W and T2W images, and on histopathology confirmed as primary ovarian leiomyoma. T1- and T2-weighted hypointensity on MRI with early homogenous postcontrast enhancement help in its diagnosis, though many a time it is difficult to differentiate it from other mesenchymal fibrous tumors such as fibroma and fibrothecoma. Histopathology and immunohistochemistry remain the mainstay in final confirmatory diagnosis. It is important to keep this entity in the differential diagnosis of solid T1 and T2 hypointense lesions of the ovary.

Primary skull base neuroendocrine carcinoma-a case report and review of literature.

Skull-based neuroendocrine carcinomas are rare tumors with only a few case reports in literature. Here we present an unusual case of primary neuroendocrine carcinoma of the skull in 60-year-old male which was proven on surgical biopsy. The imaging features of this rare tumor along with differential diagnosis are discussed with brief review of the literature.