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Teratoma prognosis

Female reproduction: Ovarian tumors at University ofTeratoma; Dysembryoma; Teratoid Tumor; Teratoma, Cystic

What is the prognosis of ovarian teratoma? - Medscap

When teratoma is the only component in lymph node metastases, the prognosis is usually good. Late recurrences (> 2 yrs. after complete response to therapy) are usually teratomas and are associated with better prognosis than post-chemotherapy recurrence with non-teratomatous GCTs Teratomas are uncommon neoplasms comprised of mixed dermal elements derived from the three germ cell layers. Historically, teratomas were attributed to demons, sexual misconduct, and abnormal fertilization. They attract attention because of their bizarre histology and gross appearance. While the maj As with many types of cancer the prognosis for those with teratoma varies greatly depending on the type of teratoma, the size and the location of the tumor. Where complete removal of the teratoma is possible prognosis is very good. For some patients complete removal is not possible due to the proximity to healthy tissue

Immature Teratoma Treatment and Prognosi

Prognosis As with many types of cancer the prognosis for those with teratoma varies greatly depending on the type of teratoma, the size and the location of the tumor. Where complete removal of the teratoma is possible prognosis is very good Prognostic factors of testicular seminoma include age and pathology of the primary tumor: small vessel invasion, tumor size, and invasion of rete testis (1). In the current study, a retrospective analysis was conducted on the 3-, 5- and 10-year survival rates of patients with testicular seminoma in 58 different cases benign mature cystic teratoma. There was no other intra­ operative or postoperative complication. Sandy was sent home the next day with no sign of chemical peritonitis. Six months postoperatively, she began to have regular monthly menses and a decrease in the rate of facial hair growth. CASE II Louise (pseudonym), a 47-year-old multigravid woman Necrosis and increased mitoses are frequent in malignant teratoma. Skeletal Muscle and Immature Muscle. This immature region of a malignant teratoma shows features of rhabdoid differentiation, with a strap-cell configuration. These types of cells would be immunoreactive with myogenin or MYOD1. Rosettes and Immature Glial Tissu

Webpathology

Immature teratoma of the ovary is an uncommon tumor, comprising less than 1% of ovarian teratomas. In contrast to the mature cystic teratoma, which is encountered most frequently during the reproductive years but occurs at all ages, the immature teratoma occurs most commonly in the first 2 decades of life and is almost unknown after menopause. By definition, an immature teratoma contains immature neural elements The prognosis of Teratoma of Lung depends upon whether it is a mature or immature type. 4 out of 5 cases are mature teratomas that behave in a benign manner. With complete surgical removal of the tumor, the prognosis is typically excellent An immature teratoma is a teratoma that contains anaplastic immature elements, and is often synonymous with malignant teratoma. A teratoma is a tumor of germ cell origin, containing tissues from more than one germ cell line, It can be ovarian or testicular in its origin. and are almost always benign. An immature teratoma is thus a very rare tumor, representing 1% of all teratomas, 1% of all ovarian cancers, and 35.6% of malignant ovarian germ cell tumors. It displays a specific age of incidence

Malignant teratoma of the mediastinum. A teratoma is a type of cancer that contains one or more of the three layers of cells found in a developing baby (embryo). These cells are called germ cells. A teratoma is one type of germ cell tumor. The mediastinum is located inside the front of the chest in the area that separates the lungs Aim: Immature teratoma (IT) of the ovary represents 1% of all ovarian cancers and 20% of malignant ovarian germ cell tumors. This retrospective study of 28 such cases aims to look at its morphological spectrum and to study the correlation of the grade and stage of the tumor with prognosis

• Teratoma is well encapsulated. • In teratomas, distinction between benign and malignant is in cooperate maturity of the constituent tissues, site, and age of the patient while seminoma is most treatable and curable cancer in early stages. • Elevated alpha feto protein levels are commonly associated with teratoma Grade 1 immature teratoma. A grade 1 immature teratoma is made up mostly of non-cancerous tissue, and only a few cancerous areas are seen. These tumors rarely come back after being removed. If careful staging has determined that a grade 1 immature teratoma is limited to one or both ovaries, surgery to remove the ovary or ovaries containing the. Ultrasound scans every 4 weeks to monitor the size of the tumor: brain teratoma presents rapidly growing, and may be associated with progressive hydrocephalus and polyhydramnios. Delivery: Place: hospital with neonatal intensive care and pediatric neurosurgery. Time: 38 weeks. Method: cesarean section if the fetal head circumference is >40 cm Cardiac teratoma of the interventricular septum with congenital aortic stenosis in a newborn. Patel A, Rigsby C, Young L Pediatr Cardiol 2008 Nov;29(6):1126-8. Epub 2008 Aug 15 doi: 10.1007/s00246-008-9281-5 Ovarian teratomas include mature cystic teratomas (dermoid cysts), immature teratomas, and monodermal teratomas (eg, struma ovarii, carcinoid tumors, neural tumors). Most mature cystic teratomas can be diagnosed at ultrasonography (US) but may have a variety of appearances, characterized by echogenic sebaceous material and calcification

What is the prognosis of sacrococcygeal teratomas

Prognosis. Gonzalez Crussi grading system is used to classify the stage of teratoma development and helps decide course of treatment. Ø Stage 0 - benign and mature. Ø Stage 1 - immature and probably benign. Ø Stage 2 - immature and possibly cancerous. Ø Stage 3 - malignant . The tumours of the first three stages have a possibility of turning cancerous The effect of 6 putative prognostic factors on survival was studied in patients with Stages III and IV malignant teratoma of the testis. Differences between survival curves were tested for. Purpose To identify the impact of the histological diagnosis on the prognosis of prenatally diagnosed sacrococcygeal teratoma (SCT), we analyzed the data obtained during prenatal surveillance and assessed the postnatal outcomes in a large cohort of fetuses with SCT in Japan. Methods A nationwide retrospective cohort study was conducted among 97 fetuses prenatally diagnosed with SCT between. Sacroccycgeal Teratoma Prognosis. A tumor that develops at the base of the tailbone or coccyx is the most common tumor seen in newborns. Sacroccycgeal Teratoma Cause, Treatment. This tumor is very rare and occurs in 1 in every 35,000 live births. Sacrococcygeal teratoma cause is not known Histologya a Good prognosis: mature teratoma with germinoma; Intermediate prognosis: immature teratoma, teratoma with malingnant transformation, or mixed tumors mainly composed of teratoma or germinoma; poor prognosis: choriocarcinoma; yolk sac tumor, embryonal carcinoma, or mixed tumors mainly composed of these tumor types. Good prognosis: 3: 10

About 30 percent of testicular cancer patients will have viable tumors or teratoma after chemotherapy, even if the lymph nodes appear normal, notes Dr. Carver. The larger the area a surgeon removes, the more lymph nodes, tumors, and teratomas are removed Sacrococcygeal teratoma is the most common of these and commonly diagnosed during birth and neonatal period. This type of tumor can affect children 4 years and below. Risk factors such as genetics, family history, infertility and exposure to carcinogenic materials and substances are also being considered Growing teratoma syndrome is a rare condition described in both testicular and ovarian cancer. We present a case of a 26-year-old male with known mixed germ cell tumor which exhibited new and progressive secondary lesions during imaging surveillance, later to be histologically characterized as teratomas This finding does not change the prognosis and should not lead to the tumor being classified as immature teratoma. Gliomatosis peritonei is a rare finding associated with teratoma and size of tumor is variable with most less than 10 cm. Mature teratomas must contain at least 2 embryonic layers

Mature cystic teratoma Clinical presentation. Mature cystic teratoma is a benign neoplasm that is composed of tissue from at least two germ cell layers (also read: solitary fibrous tumor).Although they might be present at any age, most commonly this type of teratoma is seen in young woman (around 30 years of age) However, most cervical teratomas have some type of relationship with the thyroid and the clinical picture and prognosis between these tumors is the same. Therefore, many researchers have abandoned separating these tumors and classify all neck teratomas as cervical teratomas Treatment of Growing Teratoma Syndrome. To the Editor: Growing teratoma syndrome consists of an enlarging mature teratoma arising during or after chemotherapy for a nonseminomatous germ-cell tumor. The 5-year survival rates of patients with good, intermediate and poor prognosis (International Germ Cell Consensus Classification) were 100%, 100%, and 71.4%, respectively. Patients who received induction chemotherapy at other hospitals had significantly poorer prognosis than those at our hospital (p=0.0043)

Teratoma types, causes, symptoms, diagnosis & teratoma

Therefore, from the perspective of gynecologists, we provide an overview of the relationship between the encephalitis and ovarian teratoma, the clinical features and treatment of this disease, and prognosis of pregnant women with this encephalitis Germ cell ovarian tumours. Germ cell ovarian tumours begin in the ovarian cells that develop into eggs (germ cells). They are rare and usually affect girls and young women up to their early 30s. Non cancerous (benign) teratomas are the most common type. You have surgery to remove the tumour. You might have chemotherapy if your tumour is cancerous teratoma on prognosis Teratoma components of germ cell tumors (GCTs) are clini-cally challenging due to their uniform resistance toward con-ventional anticancer treatment; for example, chemotherapy and radiotherapy. Approximately one in three non-seminoma patients undergoing residual mass resection have residual ter

Post-pubertal Teratoma : Prognosis - WebPatholog

Mediastinal teratomas. Mature teratomas of the mediastinum should be completely surgically resected. The tumor may be adherent to surrounding structures, necessitating resection of the pericardium, pleura, or lung. When complete resection is achieved, it results in excellent long-term cure rates with little chance of recurrence An immature cystic teratoma is characterised by the presence of immature or embryonic tissue, as well as the mature tissue elements seen in a mature teratoma. The proportion of immature neuroepithelium present correlates with the tumour grade (and hence prognosis) 5. Macroscopically, immature teratomas are large, encapsulated masses which have. Malignant sacrococcygeal teratoma--endodermal sinus, yolk sac tumor--in infants and children: a 32-year review. J Pediatr Surg 1985; 20:473. Marina N, London WB, Frazier AL, et al. Prognostic factors in children with extragonadal malignant germ cell tumors: a pediatric intergroup study Pure seminoma means that there are no teratoma cells in the tumour. You will have normal Alpha fetoprotein (AFP) marker levels if you have pure seminoma. There are two categories of outlook for pure seminoma testicular cancer - good prognosis and intermediate prognosis

Some studies have found that size and histology were the major factors determining prognosis for patients with malignant mixed germ cell tumors of the ovary.[6,8] Prognosis was poor for patients with large tumors when more than one-third of the tumor was composed of endodermal sinus elements, choriocarcinoma, or grade 3 immature teratoma Mediastinal teratoma is a rare disease, many cases were reported before, but few articles focus on large case analyses. The objective of this article is to summarize the clinical characteristics of benign mediastinal teratoma and the experience of surgical treatment, especially thoracoscopic surgery for benign mediastinal teratoma. The clinical data of 108 patients with benign mediastinal. Of the 99 women, 18 had bilateral mature cystic teratoma and 10 had multiple teratomas in a single ovary. Two women developed malignant germ cell neoplasms, and three developed a recurrent mature cystic teratoma in an ovary from which a teratoma was previously removed Cervical teratoma. Prevalence: 1 in 50,000 births. 5% of all fetal teratomas. Ultrasound diagnosis: Vascular solid mass with cystic components, located anterior or anterolateral to the fetal neck. The tumor grows rapidly (especially >26 weeks' gestation due to materal estrogens) and can extend inwards producing hyperextension of the neck and. PROGNOSIS Mortality for congenital teratomas depends on gestational age and the size and location of the tumors. Survival of preterm infants younger than 30 weeks' gestation with sacrococcygeal teratoma is only 7%, whereas the survival for infants older than 30 weeks' gestation is 75

Most melanoma patients 'have fewer than 20 moles' and none

Primary retroperitoneal teratomas: a review of the

  1. El tratamiento para un teratoma inmaduro incluye tanto la cirugía como la quimioterapia. Los pacientes con teratoma inmaduro grado I del grado Ia generalmente se tratan con cirugía sola porque el pronóstico es excelente. Cuando el grado del tumor avanza a 2 o 3, o la etapa va más allá de Ia, generalmente se recomienda la quimioterapia
  2. oma . Both teratoma and se
  3. Tumour-marker levels and prognosis in malignant teratoma of the testis. Germa-Lluch JR, Begent RH, Bagshawe KD. British Journal of Cancer, 01 Dec 1980, 42(6): 850-855 DOI: 10.1038/bjc.1980.332 PMID: 6161630 PMCID: PMC2010592. Free to read & use . Share this.
  4. Mature cystic teratoma of the ovary (MCTO) may occur in 10-20% of women during their lifetime [].The biological behavior of MCTO is benign, while 0.17-2% of MCTO may undergo malignant transformation [].There are various histological types of malignant transformation such as squamous cell carcinoma (SCC), adenocarcinoma, small cell carcinoma, sarcoma, malignant melanoma and mixed histology []
  5. As for the other case whose survival time arrived up to 11 years, the tumor was mature teratoma with rare foci of immature elements and without lymph node metastasis. We should be aware that renal malignant teratoma is a rare malignancy with an aggressive ability and poor prognosis, and early detection and surgical intervention is critical
  6. Introduction Attempts at defining predictors of poor outcome in fetal sacrococcygeal teratoma (SCT) have been hampered by small patient numbers. We sought to validate the utility of tumor volume to fetal weight ratio (TFR) as a predictor of poor prognosis and to identify other morphological outcome predictors in a multicenter series
Pineocytoma with astrocytic differentiation | Image

Video: Teratoma - Germ Cell Tumor Symptoms, Diagnosis, Treatment

We report survival outcomes of patients with or without teratoma in primary tumor and postchemotherapy retroperitoneal lymph node dissection (PC-RPLND) specimen and assess impact on prognosis The prognosis is related to three factors: the development of fetal hydrops, whether the teratoma is benign or malignant, and the size of the tumour. Hydrops is most frequently associated with perinatal death due to heart failure. Malignant tumours are almost invariably fatal and have a high probability of metastases, making removal impossible CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Summary.-The effect of 6 putative prognostic factors on survival was studied in patients with Stages III and IV malignant teratoma of the testis. Differences between survival curves were tested for statistical significance. A diameter> 5 cm in the larg-est tumour mass, and>8 pulmonary metastases were adverse. The association of ovarian teratoma and anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is a serious and potentially fatal pathology that occurs in young women and that is under-recognized. Our objectives were to analyze prevalence and outcome of this association, and increase awareness over this pathology. MEDLINE and SCOPUS for all studies published prior to November 30, 2013.

Germ cell tumors (GCTs) are classified as extragonadal if there is no evidence of a primary tumor in the testes or ovaries [ 1 ]. Extragonadal GCTs typically arise in midline locations, and specific sites vary with age. In adults, the most common sites, in order of frequency, are the anterior mediastinum, the retroperitoneum, and the pineal and. Gliomatosis peritonei (GP) is a rare condition characterized by mature glial tissue implants widespread in the peritoneum. The GP is often associated with ovarian teratoma. However, little is known about the characteristics and prognosis of GP. The purpose of this study was to describe the features, treatment, and prognosis of GP. Additionally, we review previously reported cases of GP. 畸胎瘤(英語: Teratoma )源自於多能性原始生殖細胞或胚胎幹細胞向胚層組織分化所形成的瘤;其成分包含已分化胚層組織和未分化細胞,兩者雜亂聚集或結構錯亂排列。 大多數畸胎瘤含有二至三個胚層組織成分,偶見僅含一個胚層組織成分;腫瘤組織多數成熟,少數未成熟,且多數為囊性,少數. An immature teratoma is a malignant tumor, which accounts for 1-3% of ovarian teratomas. 2 Teratomas usually arise in the gonads, while extragonadal teratomas are very rare and account for 2-5% of germ cell tumors. 3 Primary teratomas of the uterus have rarely been reported since 1929. 4-7 Here, the case of an 11-year-old patient who had an. WebPathology is a free educational resource with 11202 high quality pathology images of benign and malignant neoplasms and related entities

Although sacrococcygeal teratoma (SCT) is relatively common in children, it is rare in adults. The prognosis for malignant cases is poor, so prompt surgical resection is required. Transabdominal and transsacral approaches are common approaches for tumor resection. In recent years, there have been reports of tumor removal with laparoscopic assistance, but all have applied transabdominal approaches Sacrococcygeal teratoma (SCT) is an uncommon tumor seen in the newborn occurring in 1 per 35,000 to 40,000 live births. The diagnosis is frequently made prenatally although a delayed presentation, which adversely impacts prognosis, can be seen in patients with intra-abdominal lesions Developed by renowned radiologists in each specialty, STATdx provides comprehensive decision support you can rely on - Teratoma. link. Bookmarks (0) Brain. Diagnosis. Pathology-Based Diagnoses. Neoplasms. Germ Cell Tumors. Teratoma. Brain teratoma Prognosis: Survival rate: <10%. See more of Cabinet Médical Dr KIM Sochetra on Faceboo

Pathology Outlines - Teratom

Facial Teratoma in the Newborn: Diagnosis and Prognosis Nadia Ben Jamaa 1, Radhouane Achour 2*, Feirouz Ayari 3, Nadia Lamari 2, Samia Kacem 3, Khaled Neji 2 and Aida Masmoudi A malignant teratoma is a type of cancer consisting of cysts that contain one or more of the three primary embryonic germ layers: ectoderm, mesoderm, and endoderm. Because malignant teratomas have usually spread by the time of diagnosis, systemic chemotherapy is needed. The prognosis for people with malignant teratomas is based on the size of. Some fetuses with sacrococcygeal teratoma (SCT) develop hydrops, but there is no consensus on an appropriate prognostic marker for poor prognosis. The purpose of this study is to establish. Ovarian teratoma is a germ cell tumor and a common neoplasm of the ovaries. Subtypes comprise mature cystic teratoma, immature teratoma, and monodermal teratoma. Ovarian Teratoma (Ovarian Cancer Teratoma): Read more about Symptoms, Diagnosis, Treatment, Complications, Causes and Prognosis

Mediastinal teratoma Radiology Reference Article

Ovarian Teratoma. Ovarian teratoma is a condition that affects women. So, it can result in the intense pain in the abdomen or pelvic region. It is due to the ovarian torsion. The ovarian torsion refers to the twisting pressure on the organ. So, the growing mass can contribute to intense pain and discomfort Keywords: fetus, sacrococcygeal, teratoma, therapy, prognosis. Introduction. 1 Fetal SCT is usually detected by prenatal ultrasonography and diagnosed with the assistance of magnetic resonance imaging (MRI). As the pregnancy progresses, there may be fetal heart failure, fetal edema, intrauterine death, excessive amniotic fluid, mirror syndrome. Retroperitoneal laparoscopic surgery is the preferred treatment for adrenal teratoma, and the prognosis is good. Patients should be closely followed up after surgery whether the tumor is a mature or immature teratoma. However, the present results are not comprehensive due to the limited number of cases. Further studies and long-term follow-up.

Testicular teratoma Radiology Reference Article

Mature cystic teratomas are commonly referred to as dermoid cysts. They are the most common ovarian neoplasm. Mature cystic teratoma of the ovary is invariably benign. In rare cases (1-3%), they may undergo malignant change. The prognosis is generally poor for such malignant tumors. They can occur at any age Teratoma (90803, 90823, 90833) Malignant trophoblastic teratoma (91023) Embryonal carcinoma (90703; also called embryonal cell carcinoma—poorer prognosis) Teratocarcinoma (90813; a combination of teratoma and embryonal carcinoma; may metastasize as embryonal or teratocarcinoma

Prognosis Teratoma Ovarium - Alomedik

Perianal cyst prognosis. For the three nonteratoma types of perianal cysts, the prognosis is excellent. For patients with benign teratomas, adequate surgical excision is curative. Malignant teratomas or teratomas with malignant transformation have a less favorable prognosis, with neurologic involvement being an added negative prognostic factor 15) A teratoma is a unilateral, congenital neoplasm containing structures originating from all three germinal cell layers, and it exhibits a pattern of growth foreign to its anatomic site. The orbit is a rare, but typical, location in which primary extragonadal germ cell tumors arise. Fig.1: Frontal view of a huge orbital teratoma with compressed. Download a 250K clip of intracranial teratoma. Prognosis . Prognosis depends on a number of factors, including the histological type and the size and location of the lesion. Congenital intracranial teratomas are usually fatal. The limited experience with the other neoplasms in prenatal diagnosis precludes the formulation of prognostic. The prognosis depends on the size of the teratoma, its location, the degree of expansion, and the patient's age. Causes & Symptoms. The main cause of teratomas is due to an abnormal development of embryonic tissue at some point. The following is a list with the most common symptoms based on different types of tumor In an attempt to identify immunohistochemical markers of outcome, tumors with a staining pattern of lower Ki67 expression, high apoptosis, and higher p53 expression were associated with a worse prognosis in patients with EC. 40 Although both immature and mature teratoma generally showed low Ki67 expression by immunohistochemistry, mature.

Teratoma - Wikipedi

A malignant teratoma is a type of cancer consisting of cysts that contain one or more of the three primary embryonic germ layers ectoderm, mesoderm, and endoderm. Because malignant teratomas have usually spread by the time of diagnosis, systemic chemotherapy is needed. The prognosis for people with malignant teratomas is based on the size of. A teratoma is a tumor composed of all three germ cell layers; ectoderm, mesoderm and endoderm. Cervical teratoma is a rare congenital tumor with a poor prognosis and a nearly 100% mortality if not. Complete resection is the treatment of choice, which is recommended in all cases.8 Malignancy is uncommon in mature cystic teratoma and the prognosis is favourable with an 80%-100% survival reported after complete surgical excision of the tumour. Because a sacrococcygeal teratoma occurs when a fetus is developing and surgery is needed to remove it, there can be long-term effects of this tumor.. The causes of long-term effects are thought to be the teratoma pressing on nerves and tissues thereby altering the normal development of these body structures, or the nerves and tissues may be disturbed during surgery to remove the teratoma

Prognosis Teratoma Testis - Alomedik

5-year relative survival rates for testicular cancer. These numbers are based on people diagnosed with cancer of the testicle between 2010 and 2016. SEER stage. 5-year relative survival rate. Localized. 99%. Regional. 96%. Distant Sacrococcygeal teratoma (SCT) What is sacrococcygeal teratoma? Sacrococcygeal (sae-crow-cox-i-gee-ul) teratoma (terr-uh-tome-uh) is the most common tumor found in newborns. Sacro refers to sacrum and coccy refers to coccyx. The sacrum is a curved triangular bone at the bottom end of the backbones, just before the coccyx Development of a sarcomatous component in a germ cell tumor is an uncommon phenomenon. Most cases reported have a grim prognosis. Growing teratoma syndrome is also an uncommon phenomenon and occurs in approximately 2% to 7% of non seminomatous germ cell tumors and should be treated surgically. We report the case of a 12-year-old Asian girl with an ovarian mixed germ cell tumor containing a. SUMMARY: This case exemplifies the difficulty in differentiating cystic sacrococcygeal teratoma and terminal myelocystocele. Fetal sonography presentation and perinatal risks of sacrococcygeal teratoma and terminal myelocystocele are compared, and we emphasize the importance of obtaining fetal MR imaging to establish an accurate diagnosis Epignathus is a rare congenital orofacial teratoma infrequently associated with intracranial extension. Intracranial extension of an epignathus indicates a poor prognosis; however, only a small number of such cases have been reported. While there have been some studies reporting cases of epignathus expanding directly into the cranium, others have reported no communication between an epignathus.

Teratoma of the Brain (Teratoma of Brain): Symptoms

Sacrococcygeal teratoma in twin pregnancy is rare. Early antenatal diagnosis is important. Once the sacrococcygeal teratoma is diagnosed, clinicians should be aware of the associated maternal and fetal complications. Expecting parents should be counseled by the multidisciplinary team about the management and prognosis of the STC twin and co-twin The effect of 6 putative prognostic factors on survival was studied in patients with Stages III and IV malignant teratoma of the testis. Differences between survival curves were tested for statistical significance. A diameter greater than 5 cm in the largest tumour mass, and greater than 8 pulmonary metastases were adverse prognostic factors (P = 0.004 and 0.008 respectively) Immature Teratoma.— Immature teratoma typically affects a younger age group; the younger the patient, the more likely that the teratoma will be the immature germ cell type ( 31 , 34 ). Immature teratoma frequently occurs between the ages of 10 and 20 years, with a median age of 17 years, and represents 10%-20% of all ovarian malignancies in. The prognosis of such patients is therefore guarded . Although rare, diagnostic findings of malignant transformation of an ovarian teratoma may be identified on cross-sectional imaging studies, including CT, and should prompt appropriate gynecologic oncology planning

mature teratoma, the malignancy of which could be related to its clinical stage histo- logic immaturity. This study attempts to de- fine the clinical and pathologic features of pure immature teratomas and examines the relationships between their stage, immaturity, and prognosis. MATERIALS AND METHOD The study comprised 58 patients. Fifty percent of patients were between 9 and 15 years old. Mature teratoma was diagnosed in 55(94.83%) patients, while 3(5.17%) patients presented with immature teratoma. Twenty eight (50.91%) girls with mature teratoma had laparotomy and 23 (41.82%) had laparoscopy performed as an initial operative approach The prognosis for an immature teratoma is associated with tumor differentiation. Highly-differentiated tumors have a better prognosis, while those that are mainly composed of undifferentiated embryonal tissue have a worse prognosis. Ogawa et al reported that the 10-yea