Brain teratoma in a free-ranging mallard (Anas platyrhynchos) ˗ case report

ABSTRACT Teratoma is a rare neoplasia with differentiation in two or three germ cell lines. Intracranial teratoma in birds has rarely been reported, especially affecting the brain. This is the first report of a brain teratoma in a mallard with neurological clinical signs. The neoplasm was characterized as a mature brain teratoma, extending from the cerebellum to the brainstem, and with one nodule in the cortex.

Orbital teratoma in the foetus: a rare case without proptosis

Background Congenital orbital teratoma is relatively rare, and few reports of prenatal ultrasound findings in such cases have been published. Case presentation A rare case of congenital orbital teratoma at 24 + 2 weeks of gestation was previously diagnosed as microphthalmia, noting how orbital teratoma without proptosis is different from microphthalmia, retinoblastoma and intracranial teratoma. Ultrasound examination, analysis of gross specimens, and histopathological evaluation confirmed the diagnosis of orbital teratoma. Conclusion Prenatal ultrasound examination is useful for diagnosis and differential diagnosis of congenital orbital teratoma.

Mature intracranial teratoma with meningocele in a lamb

ABSTRACT: This study described the pathological aspects of a mature intracranial teratoma with meningocele in a one-day-old lamb. The diagnosis of mature teratoma was based on microscopic features, where well-differentiated tissues representative of the three germ layers were observed. The tumor consisted of respiratory, gastrointestinal and urinary epithelium as components of the endoderm; muscle and bone tissues as components of the mesoderm; and keratinized stratified squamous epithelium and adnexa as components of the ectoderm. To the best of our knowledge, this is the first report of intracranial teratoma with meningocele in animals.

Intracranial Mature Teratoma in an Adult Patient: A Case Report

Introduction: Primary intracranial teratoma is a subtype of germ cell tumors, classified into three subtypes. They occur very rarely, with only several reported individual cases in adults. Case Description We present a patient with an intermittent headache in the right frontal region. Magnetic resonance imaging (MRI) revealed a right sided high frontal parasagittal mass that compressed the falx, the right lateral ventricle, as well as the brain parenchyma. Patient underwent surgical treatment. Histopathological analysis described mature teratoma. Four months after the surgical treatment there were no signs of residual intracranial mass or relapse. Discussion Primary intracranial teratoma in adults has a nonspecific clinical presentation. MRI reveals a solitary irregular mass with multilocularity and mixed signals derived from different tissues. The patients age, biochemical markers, and patohistological analysis are necessary to confirm the diagnosis. Conclusion Teratoma treatment strategy still remains controversial. It includes radical resection whenever possible. Since the residual portion of mature teratoma may contain part of immature or malignant tissue, tumor recurrence after surgical removal is possible. Also, new tumor mass could occur at other sites intracranial after the initial one was removed. Thus, although patients usually recover, they should be followed-up for a long period of time.

Prenatal diagnosis of congenital intracranial teratoma

The case of prenatal ultrasound diagnosis of congenital brain teratoma at 35 weeks 4 days of gestation is presented. At ultrasound examination no pathology was detected at 12, 21 and 31 weeks of gestation. During ultrasound scanning of the fetus at 35 weeks of gestation the following changes were revealed: the brain architecture is represented by a thinned cortex, inhomogeneous cystic solid formation, significant macrocephaly and hydrocephaly. Pregnancy is ended by сaesarean section. A liveborn fetus with significant macrocephaly is extracted. He died after 2 days after birth. The tumor is estimated as a congenital immature (malignant) teratoma of the brain accordance with histological examination.