Introduction The term teratoma, derived from the Greek teraton meaning “a monster”, was coined by Virchow in 1869 for a tumour originating in the sacrococcygeal region. Teratomas are composed of multiple tissues foreign to the organ or site in which they arise. Although teratomas are sometimes defined as having the three embryonic layers (endoderm, mesoderm, and ectoderm), recent classification...

(This section is meant for residents to check their understanding regarding a particular topic) QUESTIONS 1. What is the incidence of sacrococcygeal teratoma? 2. What factors are considered to modify the biologic behaviour of sacrococcygeal teratomas? 3. Discuss antenatal management of sacrococcygeal teratoma? 4. How a newborn with sacrococcygeal teratoma should be worked up? 5. Discuss surgica...

Individuals with Down syndrome (DS) have a unique profile of neoplasms, with a higher incidence of leukemias and a lower incidence of solid tumors than seen in the general population. We recently encountered two cases of infants with DS with retroperitoneal teratoma. After reviewing the literature on teratomas in DS, we found that the incidence of retroperitoneal teratomas was higher and the in...

Epignathus or oropharyngeal teratomas are extremely rare congenital neoplasms that arise from the oral cavity or pharynx. Teratomas commonly occur in sacrococcygeal region. However, less than 5% occur in the head and neck. Malignant teratomas account 5%-30% of all teratomas. We present an unusual case of immatureoropharyngeal teratoma that arises from sphenoid with intracranial extension, in a ...

CONFLICT OF INTEREST NONE DECLARED. INTRODUCTION Teratomas are derived from embryonic tissues that are typically found in the gonadal and sacrococcygeal regions of adults and children. Primary teratomas in the retroperitoneum are very rare in infant and primary adrenal teratomas are extremely rare. Early diagnosis and surgical resection are important for effective treatment. CASE REPORT We ...

IMPORTANCE Noncongenital immature teratomas in the head and neck are extremely rare, and to our knowledge have not previously been reported in the maxillary sinus of a pediatric patient. OBSERVATIONS Teratomas are neoplasms that contain tissue from more than 1 embryonic cell layer that is foreign to the location where they arise and are most commonly found in the sacrococcygeal and gonadal re...

Although the sacrococcygeal area is the most common site for a teratoma in infants, it is a rare site for a teratoma in older patients. Most of the teratomas found in this area in adults are single mass, but in a few cases, multiple masses have been reported. The author reports on the case of an 18-year-old female patient with 3 presacral teratomas. The tumors were surgically removed via a tran...

Teratomas are bizarre neoplasms derived from embryonic tissues that are typically found only in the gonadal and sacrococcygeal regions of adults. Retroperitoneal teratomas are rare and present challenging management options. We report here the case of a histologically unusual retroperitoneal tumor detected on computed tomography during the workup of abdominal pain in a 32-year-old male. The eva...