Organized hematoma in the paranasal sinus and nasal cavity--imaging diagnosis and pathological findings.
OBJECTIVE
The "organized hematoma" is a non-neoplastic, hemorrhagic lesion, which can develop in the paranasal sinus and nasal cavity. This is the first report on the relationship between the imaging and pathological findings.


METHODS
We diagnosed organized hematoma, based on three criteria: no existence of neoplastic cells; consistency of hematoma and fibrosis; and development from the paranasal sinus and nasal cavity. We retrospectively investigated six cases from the patients' medical records.


RESULTS
On the imaging findings, the central part of the lesion was enhanced more strongly than the lesion periphery. All of the pathological findings were hematoma at the center, and fibrosis at the periphery. In three of the cases, dilated vessels were found but not in the other three.


CONCLUSIONS
We found that the biphasic appearance of the imaging findings correlated with that of the pathological findings. There are two pathological types--the dilated vessel type and the non-dilated vessel type.
Omura
Go
G
The Department of Otorhinolaryngology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan. goomura@msn.com
Watanabe
Kenta
K
Fujishiro
Yoshinori
Y
Ebihara
Yasuhiro
Y
Nakao
Kazunari
K
Asakage
Takahiro
T
D000328:Adult; D003937:Diagnosis, Differential; D004724:Endoscopy; D005260:Female; D005355:Fibrosis; D006406:Hematoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009296:Nasal Cavity / Q000473:pathology / Q000601:surgery; D015508:Nasal Obstruction / Q000175:diagnosis / Q000473:pathology; D009668:Nose Diseases / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D010254:Paranasal Sinus Diseases / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed