[Clinical studies on the paraneoplastic syndrome in intrathoracic neoplastic diseases].

Two own clinical observations concerning the paraneoplastic syndrome are reported: Gynecomastia and hypertrophic osteoarthropathy. The two symptoms appeared as primary manifestation of a bronchial carcinoma and an intrathoracically situated teratoma. The gynecomastia in an estrogen-producing teratoma of this localisation hitherto has not been described; its classification as paraneoplastic syndrome is established. The value of such individual observations may be that the knowledge of these syndromes should be deepened and thus should be indirectly contribute to the diagnostics of tumours, or even to the early recognition of the tumour.