A case of solid pseudopapillary neoplasm of the pancreas and tumor doubling time.
BACKGROUND
Solid pseudopapillary neoplasm of the pancreas is a rare tumor with unique clinicopathological features. Although it is considered to grow slowly, little is known about its doubling time.


METHODS
We encountered a young Japanese woman with a solid pseudopapillary neoplasm of the pancreas that had been detected at another hospital 5 years previously but was resected at our hospital. The tumor showed only a solid component without any cysts. Computed tomographic scans taken 5 years apart were compared to determine the tumor doubling time.


RESULTS
The tumor doubling time according to the formula of Schwartz and co-workers was determined to be 765 days.


CONCLUSIONS
These findings confirm that this tumor grows quite slowly and also support long disease-free periods even in patients who have recurrence or metastases.
Kato
Tetsuro
T
Department of Internal Medicine, Tokyo Metropolitan Komagome Hospital, Japan.
Egawa
Naoto
N
Kamisawa
Terumi
T
Tu
Yuyang
Y
Sanaka
Masaki
M
Sakaki
Nobuhiro
N
Okamoto
Atsutake
A
Bando
Nobuko
N
Funata
Nobuaki
N
Isoyama
Toru
T
D000328:Adult; D002291:Carcinoma, Papillary / Q000473:pathology* / Q000601:surgery*; D002455:Cell Division / Q000502:physiology*; D005260:Female; D006801:Humans; D007700:Kinetics; D010190:Pancreatic Neoplasms / Q000473:pathology* / Q000601:surgery*; D013997:Time Factors; D016896:Treatment Outcome