A cystic space containing chocolate-colored fluid is characteristic of_______________?
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Answer: D. Papillary cystadenoma lymphomatosum
Explanation
Warthin tumor contains cystic spaces filled with thick brown fluid rich in cellular debris. The brownish chocolate-colored fluid results from cystic degeneration and hemorrhage inside the tumor. This characteristic fluid appearance aids pathologists during microscopic examination. Papillary cystadenoma lymphomatosum is the formal histopathological name for Warthin tumor. It represents a benign salivary gland neoplasm occurring almost exclusively in the parotid gland. Histology reveals double-layered oncocytic epithelium overlying lymphoid stroma.
Maxillofacial surgeons remove parotid tumors carefully to preserve facial nerve function. Smokers have a significantly higher risk of developing Warthin tumors compared to non-smokers. Fine needle aspiration biopsy helps identify benign salivary neoplasms prior to surgery. Dentigerous cysts enclose the crown of an unerupted tooth containing clear straw-colored fluid. Odontogenic keratocysts contain thick cheesy keratinaceous debris rather than chocolate fluid. Unicystic ameloblastomas present with cystic spaces containing serous or hemorrhagic fluid.
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