[Recurrent pheochromocytoma].
OBJECTIVE
To improve the diagnosis of recurrent pheochromocytoma.


METHODS
To study 11 cases of recurrent pheochromocytoma treated from 1970 to 1996.


RESULTS
The recurrence was due to the metastasis of malignant tumor and the multifocal occurrence of benign one. Extraadrenal pheochromocytomas tended to occur at several sites or metastasize. The metastatic places usually no show pheochromatic tissues, and the recurrent benign tumors were liable to grow at extraadrenal regions. The nature of recurrent tumors should be judged according to variant factors.


CONCLUSIONS
The recurrent pheochromocytomas are not malignant in nature, but they have considerable malignant tendency and should undergo intensive survelliance and regular examinations especially for the primary or recurrent extraadrenal pheochromocytomas.
Sun
Z
Z
Department of Urology, First Affiliated Hospital, China Medical University, Shenyang 110001.
Wang
Y
Y
Li
Z
Z
D000293:Adolescent; D000310:Adrenal Gland Neoplasms / Q000473:pathology / Q000601:surgery; D000328:Adult; D001342:Autonomic Nervous System Diseases / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D010673:Pheochromocytoma / Q000473:pathology / Q000601:surgery; D001749:Urinary Bladder Neoplasms / Q000473:pathology / Q000601:surgery