[A rare case of tumor-to-tumor metastasis: secondary deposits of pulmonary adenocarcinoma in a secretory meningioma].
OBJECTIVE
To report a rare case of tumour-to-tumour metastasis with differential diagnostic considerations.


RESULTS
We report the operation of a Sylvian fissure secretory meningioma in a 48 year-old woman. The tumour was suspicious of a metastasis related to a pulmonary adenocarcinoma operated 4 months before. Histopathology confirmed metastatic adenocarcinoma in a secretory meningioma.


CONCLUSIONS
Both secretory meningioma and tumour-to-tumour metastasis are rare, and to our knowledge this is the first report of such a rare coincidence. Secretory meningioma can simulate metastases both clinically (extensive oedema, space occupation, carcinoembryonic antigen secretion) and pathologically (secretory inclusions, positivity for cytokeratin 7 and carcinoembryonic antigen and negativity for vimentin), and therefore may cause a special differential diagnostic dilemma.
D000230:Adenocarcinoma / Q000556:secondary*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008175:Lung Neoplasms / Q000556:secondary*; D008577:Meningeal Neoplasms / Q000473:pathology*; D008579:Meningioma / Q000473:pathology*; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
Tumorba való áttétképzôdés ritka esete: a tüdôrák áttéte secretoros meningeomába.