Department of Surgery Jars
| Description | Periosteal Fibroma or Fibrosarcoma. |
| Author | Department of Surgery |
| Copyright | Cairo University - Faculty of Medicine |
Description
This jar contains one half of a vertically-bisected humerus with some of
the overlying muscles. There is an apparently well-localized swelling
that surrounds the middle of the shaft. The swelling arises from the
periosteum but does not invade bone or the surrounding muscles. The
swelling measures about 12 X 12 cm in maximum diameters. The cut section
shows heterogenicity of colour with no evident necrosis nor haemorrhage.
Diagnosis
Periosteal fibroma or fibrosarcoma.
Remember that a
sarcoma may grossly give a false impression of being well-encapsulated.
Other tumours that may give this false impression are:
Renal cell carcinoma (hypernephroma)
Pleomorphic adenoma of the parotid. This is a benign tumour but its
capsule is defective with microscopic projections of neoplastic tissue
into the surroundings. Therefore, simple enucleation is followed by
recurrence.