BackgroundMeningeal melanocytoma is a rare pigmented tumor arising from leptomeningeal melanocytes. Patients with this tumor might initially consult a dentist because a mass lesion in Meckel’s cave could manifest as dental pain and malocclusion, thereby mimicking temporomandibular disorder. The diagnostic approach, especially using imaging modalities, would be challenging in such cases unless an interdisciplinary approach is used.Case presentationHere, we report a case of a 39-year-old Japanese man who had a history of pain and numbness on the left side of his face and malocclusion for 3 months before the initial visit. The diagnosis was primary intracranial meningeal melanocytoma arising from Meckel’s cave.ConclusionsThe process by which the final diagnosis of meningeal melanocytoma was reached highlights the importance of collaboration between the medical and dental disciplines. This case also demonstrates that meningeal melanocytoma has a specific signal pattern on magnetic resonance imaging, including high signal intensity on T1-weighted images and low signal intensity on T2-weighted images.
Cystadenocarcinoma is a rare malignant tumor that accounts for less than 0.2% of all salivary gland tumors. We report a rare case of cystadenocarcinoma arising in the hard palate. A 63-year-old man was referred to our department for a detailed examination of a 2.5mm mass on the right side of the hard palate. A biopsy was performed based on the clinical diagnosis of papilloma, and the results showed cystadenocarcinoma. Imaging studies showed no cervical lymph node metastasis or distant metastasis. Based on the diagnosis of cystadenocarcinoma, the tumor resection was performed under general anesthesia. Nine years have passed since the surgery, and there has been no sign of recurrence or metastasis.
BackgroundMyoepithelioma is a rare type of salivary gland tumor that mainly occurs in the parotid glands and palate.Case presentationA 43‐year‐old woman presented with swelling and pain in the right maxillary molar. We performed enucleation and curettage under general anesthesia. The tumor was cyst‐like. Histopathological examination revealed nests of tumor cells diffusely interspersed within fibrotic connective tissues. A few cells were positive for cytokeratin AE1/AE3, α‐SMA, GFAP, and vimentin; S‐100 protein and calponin were also positive. Final diagnosis was myoepithelioma.ConclusionOver 7 years after the surgery, the postoperative course was good, with no recurrence of the tumor.
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