[Malignant mediastinal mesenchymoma associated with gastric cancer].
D000230:Adenocarcinoma / Q000473:pathology*; D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000473:pathology*; D008637:Mesenchymoma / Q000473:pathology*; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary; D013274:Stomach Neoplasms / Q000473:pathology*