Search results for “fibromas”
345 results
Article
Skeletal lesions with giant cells
There are a number of skeletal lesions with giant cells on histology, which may occasionally lead to mischaracterization of the lesion.
Below is a list of lesions with giant cells as an important histological feature, to aid in differential diagnosis if the histological diagnosis of a lesion do...
Article
Bone tumors with internal trabeculations (mnemonic)
A mnemonic to remember the types of bone tumors with internal trabeculations or pseudotrabeculations is:
D CHANG
Mnemonic
D: desmoplastic fibroma
C: chondromyxoid fibroma
H: hemangioma (intraosseous)
A: aneurysmal bone cyst
N: non-ossifying fibroma
G: giant cell tumor
Article
Osteochondromyxoma
Osteochondromyxomas (OMX) are very rare benign tumors with both a chondroid and osteoid matrix mostly seen within the Carney complex.
Epidemiology
Generally, osteochondromyxomas are extremely rare. Within the Carney complex, they occur in about 1% of the patients and are usually seen early in ...
Article
Ovarian thecoma
Ovarian thecomas are benign ovarian tumors of sex cord / stromal (mesenchymal) origin. They are thought to account for approximately 0.5-1% of all ovarian tumors. As ovarian thecomas secrete estrogen, they are described as functional ovarian tumors.
Epidemiology
They typically present in older...
Article
Osteolytic lesions with septations and trabeculations (differential)
Differential diagnosis of lytic bone lesions with septations and trabeculations include 1:
benign lesions
unicameral bone cyst
aneurysmal bone cyst
giant cell tumor
non-ossifying fibroma
intraosseous lipoma
fibrous dysplasia
Brown tumor
ameloblastoma
adamantinoma
haemophilic pseudotum...
Article
Phosphaturic mesenchymal tumor
Phosphaturic mesenchymal tumors are the cause of the vast majority of cases of tumor-induced (oncogenic) osteomalacia due to the production of fibroblast growth factor-23 (FGF-23).
Epidemiology
These tumors are extremely rare, with fewer than 500 cases reported in the literature 1. Most occur ...
Article
Meigs syndrome
Meigs syndrome is defined as the presence of ascites and pleural effusion in association with a benign, usually solid ovarian tumor, most commonly an ovarian fibroma.
Epidemiology
Most presentations occur in post-menopausal women with a peak incidence at ~70 years old. It is extremely rare in ...
Article
Parosteal osteosarcoma
Parosteal osteosarcoma is a subtype of osteosarcoma and arises from the outer layer of the periosteum.
Epidemiology
It is the most common type of juxtacortical or surface osteosarcoma and accounts for ~4% of all osteosarcomas 1-3. It typically presents in early adulthood and middle age with a...
Article
Fibrous lesions
The differential for fibrous lesions is wide and includes:
non-ossifying fibroma
fibrous dysplasia
osteofibrous dysplasia / adamantinoma
desmoplastic fibroma
fibromatoses, e.g.
plantar fibromatosis
palmar fibromatosis
malignant fibrous histiocytoma / fibrosarcoma
dermatofibrosarcoma p...
Article
Desmoid tumor
Desmoid tumors are benign, non-inflammatory fibroblastic tumors with a tendency for local invasion and recurrence post resection. They are sometimes considered a locally aggressive proliferative disease within the family of soft-tissue sarcomas but, metastasis is uncommon 7,11.
Terminology
Th...
Article
Ovarian tumors
Ovarian tumors are relatively common and account for ~6% of female malignancies. This article focuses on the general classification of ovarian tumors. For specific tumor features, please refer to the relevant subarticles.
Pathology
Subtypes
Primary ovarian tumors
Surface epithelial-stromal o...
Article
Differential diagnosis for metatarsal region pain
Forefoot pain in the metatarsal region is a common complaint and may be caused by a number of conditions. It is worthwhile for a radiologist to have knowledge of the potential causes and their imaging features 1.
Pathology
Etiology
Trauma
turf toe
plantar plate disruption
sesamoiditis
str...
Article
Sclerosing stromal tumor of the ovary
Sclerosing stromal tumor (SST) of the ovary is a rare ovarian neoplasm. It is considered a subtype of ovarian sex cord / stromal tumor and is included in the fibroma-thecoma group of ovarian tumors 9.
Epidemiology
It occurs predominantly in young women and its incidence peaks around the 2nd to...
Article
Chondroblastoma
Chondroblastomas are benign chondrogenic bone neoplasms characteristically arising in the epiphysis or apophysis of a long bone in young patients. Despite being rare, they are one of the most frequently encountered benign epiphyseal neoplasms in skeletally immature patients 1.
Chondroblastoma a...
Article
Sex cord / stromal ovarian tumors
Sex cord / stromal ovarian tumors are a subtype of ovarian tumors and account for 8-10% of all ovarian tumors. They arise from two groups of cells in the ovary:
stromal cells
primitive sex cords: celomic epithelium
The group of tumors includes
ovarian fibroma-thecoma spectrum
ovarian fibrom...
Article
Brenner tumor
Brenner tumors are an uncommon surface epithelial tumor of the ovary. It was originally known as a transitional cell tumor due to its histological similarity to the urothelium. Brenner tumors account for ~3% of ovarian epithelial neoplasms. They can very rarely occur in other locations, includin...
Article
Pseudo Meigs syndrome
Pseudo Meigs syndrome refers to a clinical syndrome of pleural effusion and ascites associated with an ovarian tumor that is not a fibroma or a fibroma-like tumor.
Pathology
Entities that have been reported to result in pseudo Meigs syndrome include
Krukenberg tumors
colon carcinoma metastas...
Article
Tuberous sclerosis (diagnostic criteria)
The tuberous sclerosis diagnostic criteria have been developed to aid the diagnosis of tuberous sclerosis and have been updated in 2012 by the International Tuberous Sclerosis Complex Consensus Group (at time of writing - 2019) 1.
Diagnosis
Genetic criteria
The identification of either a TSC...
Article
Benign lytic bone lesions
Benign lytic bone lesions encompass a wide variety of entities. A useful starting point is the FEGNOMASHIC mnemonic.
The differential diagnosis for benign lytic bone lesions includes:
fibrous dysplasia (FD)
eosinophilic granuloma (EG)
enchondroma
non-ossifying fibroma (NOF)
osteoblastoma
...
Article
Fibrous dysplasia
Fibrous dysplasia (FD) is a developmental benign medullary fibro-osseous process characterized by the failure to form mature lamellar bone and arrest as woven bone that can be multifocal. It can affect any bone and occur in a monostotic form involving only one bone or a polyostotic form involvin...
Unable to process the form. Check for errors and try again.