A teratoma is a tumor made up of several different types of tissue, such as hair, muscle, teeth, or bone. Teratoma typically form in the ovary, testicle, or coccyx. [Source: Wikipedia ]

Is A
Germ cell neoplasm
Germ cell tumor
Liver neoplasm
Pineal tumor
Primary liver tumor
Presacral teratoma
Sacrococcygeal teratoma
May Cause
Abdominal calcification in an infant or child
Anterior indentation on rectosigmoid junction
Avascular intracranial mass
Avascular or hypovascular liver lesion
Brain tumor in an infant
Calcifications in scrotum
Calcified mediastinal mass
Calcified pancreatic lesion
Cardiac or pericardial neoplasm or cyst
Curvilinear intracranial calcification
Cystic mesenteric lesion
Ectopic gonadotropin production
Enlarged brainstem
Enlarged intervertebral foramen
Enlargement or erosion of sella turcica
Extradural lesion with normal adjacent bone
Extradural spinal lesion
Extratesticular tumor in scrotum
Fat-containing renal mass
Fatty liver lesion
Fatty mass in abdomen
Fatty pancreatic lesion
Fatty parapharyngeal space lesion
Fetal cardiac mass
Fetal chest mass
Fetal intra-abdominal calcification
Focal calcification in kidney
Focal cystic or low density splenic lesion
Fourth ventricular lesion
Germ cell testicular tumor
Hormone-secreting neoplasm causing precocious puberty
Hyperdense sellar lesion
Hyperdense suprasellar lesion
Hypodense brainstem lesion
Hypodense sellar lesion
Hypodense suprasellar lesion
Hypodense supratentorial lesion
Hypoechoic placental lesion
Increased presacral space
Increased prevertebral space in infants or children
Indistinct heart border on frontal chest radiograph
Infratentorial intracranial tumor in a child
Intradural extramedullary spinal lesion
Intramedullary spinal lesion
Intraorbital calcification
Intraventricular lesion
Juxtadiaphragmatic lesions in children
Lateral ventricle body lesion
Mass in scrotum
Massive pleural effusion
Mediastinal shift
Metastasis to subarachnoid space
Minimally enhancing intracranial lesion
Nasal ridge mass in a child
Nasopharyngeal lesion
Neck mass
Neonatal renal mass
Nonvisceral abdominal calcification
Paralaryngeal cystic mass
Parasellar calcification
Parasellar lesion
Pediatric chest tumor
Pericoronal radiolucency in the jaw
Posterior fossa tumor in a child
Posterior mediastinal lesion
Posterior third ventricle lesion
Presacral mass
Renal cystic disease
Sacrococcygeal mass
Scrotal calcification
Sellar lesion
Sinonasal lesion
Soft-tissue mediastinal mass
Soft-tissue neck mass
Solid mesenteric lesion
Solid ovarian tumor
Solid pelvic mass
Solid placental mass
Solitary intracranial calcification
Solitary lesion of spleen
Superior mediastinal mass
Supratentorial intracranial tumor in a child
T1-hyperintense intracranial lesion
T1-hypointense brainstem lesion
T2-hyperintense intracranial lesion
T2-intermediate renal mass
Testicular tumor in a child
Umbilical cord enlargement
Unilateral exophthalmos
Unilateral testicular tumor
Vallecular mass
Water-attenuation mediastinal lesion
Wide mediastinum
Wide superior mediastinum in an infant or child