Heterotopic bone formation is seldom detected in lesions of gastrointestinal pathology. We report a rare case of osseous metaplasia in a juvenile rectal polyp in a four year old boy with a brief review of literature. As per the literature survey, this appears to be ninth case of osseous metaplasia in a juvenile rectal polyp. ARTICLE HISTORY

Teratomas are the germ cell tumors composed of multiple cell types derived from one or more of the three germ layers.Teratomas range from benign well differentiated [mature] cystic lesions to those that are solid and malignant [immature].Additionally, teratomas may be monodermal and highly specialized. Rarely, within some mature teratomas, certain elements like squamous component undergo malignant transformation.Teratomas are known to occur at birth and are derived from pleuripotent germ cells and embryonic cells. Teratomas of embryonic origin are congenital and are seen in the midline of the body-skull, neck, mediastinum, retroperitoneum, and coccyx.Teratomas derived from the germ cells are seen in testis in men and ovaries in women. AIMS: This prospective and retrospective study was conducted to determine the frequency of the teratomas occurring in various sites along with their histomorphological presentations. MATERIALS AND METHODS: The study was conducted at Rajarajeswari Medical College and Hospital between January 2010 to December 2012 in the Department of Pathology. Morphological and histopathological features of teratomas were studied. RESULTS: Teratomas were more common in females between 25-35yrs.Most of the teratomas were seen in ovaries followed by retroperitoneum and sacrococcygeal region.87% of teratomas diagnosed were of mature cystic teratoma with histologic grading 0 and remaining 13% showed malignant transformation. CONCLUSION: Mature teratomas are typically benign and found more frequently in women and there is risk of malignant transformation.

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Carcinoma ex-pleomorphic adenoma (CaxPA) is a carcinoma arising from a primary or recurrent benign pleomorphic adenoma (PA). It presents approximately 11.6% of all malignant neoplasms of salivary gland and mostly originates from major salivary glands. It is a common histologic subtype of primary parotid malignancy. Location in the minor salivary gland is uncommon and occurs in less than 7% of all cases. The majority of CaxPA develops from epithelial component of PA. Salivary gland tumors are known to have a benign clinical behavior with unrecognized metastatic potential. It often poses a diagnostic challenge to clinicians and pathologists. The entity is difficult to diagnose preoperatively. Pathologic assessment is the gold standard for making the diagnosis. We present a case of a 55-year-old female patient who had a right preauricular mass of 10 years duration, with sudden onset of pain of duration of 1 month. How to cite this article Sharmila PS, Shashikala K, Harish K, Jeychandran P. An Unusual Case of Carcinoma Expleomorphic Adenoma of the Parotid Gland: A Comprehensive Clinicopathological Review. J Med Sci 2015;1(2):44-46.