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Difference between revisions of "Fibroblastic/myofibroblastic tumours"
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Fibroblastic/myofibroblastic tumours (view source)
Revision as of 22:58, 5 May 2012
, 22:58, 5 May 2012→Solitary fibrous tumour: +malignant
m (→Microscopic: w) |
(→Solitary fibrous tumour: +malignant) |
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| Line 319: | Line 319: | ||
===Microscopic=== | ===Microscopic=== | ||
Features: | Features: | ||
* | *Spindle cells in a patternless pattern. | ||
*Hemangiopericytoma-like area ([[staghorn vessels]]). | *Hemangiopericytoma-like area ([[staghorn vessels]]). | ||
*Keloid-like collagen bundles - '''key feature'''. | *Keloid-like collagen bundles - '''key feature'''. | ||
*Usually well-circumscribed. | |||
Criteria for malignancy:<ref>{{Ref WMSP|609}}</ref> | |||
*Necrosis. | |||
*Mitoses >4/10 HPF (definition suffers from [[HPFitis]]). | |||
*Increased cellularity. | |||
*Marked nuclear atypia. | |||
*Infiltrative margin. | |||
Images: | Images: | ||