bone cyst

Aneurysmal bone cyst of clivus and C1 C2: case report and review of literature.

Aneurysmal Bone Cyst. Aneurysmal bone cysts may contain many giant cells but show far more cellular pleomorphism, hyperchromatism, and a variety of other cells often of indeterminate appearance [4].

Based on the findings of MRI and CT, an intraosseous ganglion, cyst of degenerative disease, giant cell tumor, aneurysmal bone cyst, and chondroblastoma of the glenoid were suspected.

They are very similar histologically and radiologically to other giant-cell lesions and differential diagnosis includes giant- cell reparative granuloma, true giant-cell tumor and aneurysmal bone cyst. The familial type of hyperparathyroidism with associated lesions in the jaw and kidney is called hyperparathyroidism--jaw tumor (HPT-TT) syndrome.

It helps in defining exact location of lesion, but there are also limitations such as some primitive bone lesions like bone Ewing's sarcoma may appear as normal while some benign lesions like aneurysmal bone cyst or osteoblastoma may appear aggressive on roentgenogram.

Unicameral bone cyst (UBC), also known as simple bone cyst or solitary bone cyst, as the names implies, is generally a unilocular and solitary lesion, which may appear multilocular.

Number and percentage of each pathology Pathology details n % Simple bone cyst 2 3.2 Recurrent ameloblastoma 1 1.6 Osteosarcoma 6 9.7 Osteoid osteoma 1 1.6 Osteochondroma 3 4.8 Multiple myeloma 4 6.5 Metastases 4 6.5 Marrow edema 2 3.2 Lymphoma 4 6.5 Lipoma 1 1.6 Langerhans cell hystocystosis 1 1.6 Inflammatory 4 6.5 Hemangioma 2 3.2 Fibrous dysplasia 1 1.6 Fibrous cortical defect 2 3.2 Ewing sarcoma 16 25.8 Enchondroma 2 3.2 Chondrosarcoma 3 4.8 Chondromyxoid fibroma 1 1.6 Aneurysmal bone cyst 2 3.2 Table 2.

Infiltrative intraosseous lipomas in birds should be distinguished from other lytic bone tumors, including giant cell tumors, (14) air sac cystadenocarcinoma, (15) soft tissue sarcoma, (16) osteoma aneurysmal bone cyst, (18) traumatic bone cyst, (4) and ossifying fibromas, (19) as well as infectious conditions including mycobacteriosis or salmonellosis (20) and metabolic conditions such as nutritional hyperparathyroidism.

These lesions include solitary bone cyst, aneurysmal bone cysts, osteofibrous dysplasia, myositis ossificans, brown tumour of hyperparathyroidism, and giant-cell granuloma.

An MRI revealed that the finding belonged to a benign lesion, a simple bone cyst.

Intraneural and extraneural tumors, hypertrophy seen in athletes in muscles, ganglion of tibiofibular joint, peroneal vascular aneurism, osteochondroma of proximal tibia and fibula, aneurismal bone cyst are the reasons of internal pressure.