DISCUSSION Giant cell tumour of the tendon sheath (GCT-TS) comprises approximately 1.6% of all soft-tissue tumors and is characteristically a benign peritendinous fibrous mass.  It is a slow growing proliferative benign non tumoural mass that may arise from the surrounding soft tissues, bursae, joint capsule, ligaments and tendon sheaths. [5 Giant cell tumor (GCT) of the soft tissue (GCT-ST) is a rare, unusual primary soft tissue tumor that is completely distinct from, and should not be confused with, any giant cell-rich tumor of bone.. Giant cell tumour of tendon sheath is a relatively common tumour of small joints. It is grouped with the chondro-osseous tumours. It is abbreviated GCT of tendon sheath . Fibroma of tendon sheath (abbreviated FTS) redirect to this article
What is a Giant cell tumor of bone. Giant cell tumor is a locally aggressive neoplasm of uncertain origin which affects predominantly the epiphysis of long bones. It is so called because the tumor is predominated by the presence of multinucleated osteoclast like giant cells. It was also referred to as osteoclastoma for the same reason SMGCTB were initially diagnosed as conventional giant cell tumor of bone, the recurrent lesion showing malignant features. Histologically, the malignant components included osteosarcoma (11 cases), undifferentiated high-grade pleomorphic sarcoma (two cases), and fibrosarcoma (four cases). SMGCTB cases showed strong expression of p53
.5% of all primary bone neoplasms 1. They almost invariably (97-99%) occur when the growth plate has closed and are therefore typically seen in early adulthood. 80% of cases are reported between the ages of 20 and 50, with a peak incidence between 20 and 30 1 Giant cell tumor of soft tissue (GCT-ST) is an uncommon neoplasm usually occurring in the superficial and deep soft tissues of the extremities [ 1 ]. This tumor type is categorized by tumors with low malignant potential and a propensity for local recurrence, while rarely metastasizing [ 2 ] Giant Cell Tumor - Bone, Histology, PathologySlides for the practical part of the pathology exam at Masaryk Universityhttp://atlases.muni.cz/atlases/stud/atl.. Giant cell tumor (GCT) of bone is a locally aggressive, rarely metastasizing primary bone neoplasm that occurs most frequently in the epiphysis of long bones of young adults. It is composed of round, oval, or elongated mononuclear cells admixed with osteoclast-like giant cells that express receptor activator of nuclear factor κB (RANK) Giant cell tumor of bone: imaging and histology changes after denosumab treatment : Comment on: von Borstel D, Taguibao RA, Strle NA, Burns JE. Giant cell tumor of the bone: Aggressive case initially treated with denosumab and intralesional surgery. Skeletal Radiol 2017;46:571-578. Zhang Y(1)(2), Ilaslan H(2)(3), Bauer TW(4)(5)(6)
Giant cell tumor of bone: imaging and histology changes after denosumab treatment. Comment on: von Borstel D, Taguibao RA, Strle NA, Burns JE. Giant cell tumor of the bone: Aggressive case initially treated with denosumab and intralesional surgery. Skeletal Radiol 2017;46:571-578. Yaxia Zhang 1,2 Giant cell, also called Langhans giant cell, large cell characterized by an arc of nuclei toward the outer membrane. The cell is formed by the fusion of epithelioid cells, which are derived from immune cells called macrophages
Giant cell tumor of soft tissue (GCT-ST) is uncommon and defined as a primary soft tissue neoplasm that is histologically and clinically similar to GCT of the bone [ 1 ]. In 1972, Salm and Sissons [ 2] firstly reported GCT-ST as a case series of ten cases of soft tissue tumors that had histologic features identical to those of GCTs of the bone . 41-43 On gross examination, giant cell tumor of soft tissue is a circumscribed, nodular mass with a red-brown or gray cut surface. Foci of bone may be observed at the periphery of the tumor Giant cell tumor of tendon sheath is also named tenosynovial giant cell tumor. GCT of tendon sheath is a circumscribed tumor that does not always arise from the tendon sheath but may arise from the synovium. Most common in patients after 30 years old and it is the second most common benign hand tumor after a ganglion cyst Giant Cell Tumor of Bone : Aneurysmal Bone Cyst-like areas. Giant Cell Tumor of Bone - Foam Cells. Giant Cell Tumor of Bone - Necrosis. Giant Cell Tumor in Sphenoid Bone . Tweets by @WebPathology. Slide Index Neuropath Breast Head & Neck Mediastinum Peritoneum Genitourinary Lymph Node/Spleen Hematopatholog
Soft tissue giant cell tumor of low malignant potential: a proposal for the reclassification of malignant giant cell tumor of soft parts. Mod Pathol. 1999 Sep;12(9):894-902. O'Connell JX, Wehrli BM, Nielsen GP, Rosenberg AE. Giant cell tumors of soft tissue: a clinicopathologic study of 18 benign and malignant tumors Malignant giant cell tumor of bone or soft tissue (MGCTBS) is one of the malignant tumors associated with poor prognosis. However, it remains controversial whether the combined treatment of both surgery and radiotherapy (surgery + RT) leads to better survival outcomes than surgical treatment alone (surgery alone) does for patients diagnosed with MGCTBS Letter to the Editor Giant cell tumor of bone (GCTB) is a rare, benign primary bone tumor that commonly occurs in young adults. It accounts for approximately 5% of all primary bone tumors and approximately 20% of all benign bone tumors [ 1 - 5 ] The histology of GCT includes three distinct cell types: multinucleated osteoclast-like giant cells, spindle-shaped osteoblast-like stromal cells, and monocytes (likely precursors of the giant cells) . GCTs are considered as benign tumors but may present aggressive local behavior with a high recurrence rate and/or metastatic spread Giant cell tumor of the right femur. (A) X-ray of the right knee showing a lytic lesion in the distal femoral metaphysics without significant cortical destruction or periosteal reaction.(B-D) Hematoxylin and eosin-stained sections showing the hemorrhagic tumor (B) with multinucleated osteoclast-like giant cells with vesicular nuclei and prominent nucleoli and surrounding spindle cells (C, D)
and MRI scans (imaging), and we have the histology (results) from the biopsy taken from the tumour. We will also carry out a chest X-ray to see if any cells have spread to your lungs. Treatment options The usual treatment for giant cell tumour is surgery to remove the tumour. You may need to have some metalwork inserted during the surgery to. The histology of GCT-ST is similar to that of giant cell tumor of the bone in which H3F3A variants have been noted in more than 90% of tumors. 2 The H3F3A variant can be used to distinguish giant cell tumor of the bone from chondrosarcoma and giant cell-rich sarcomas of bone. 3 To our knowledge, this is the first documented association of a pathogenic variant of PALB2 with giant cell tumors and specifically with GCT-ST Giant cell tumor (GCT) of bone is a locally destructive tumor that occurs predominantly in long bones of post-pubertal adolescents and young adults, where it occurs in the epiphysis. The majority are treated by aggressive curettage or resection. Vascular invasion outside the boundary of the tumor can be seen
Giant cell tumor (GCT) is a benign, locally aggressive primary bone tumor. It appears most commonly at the ends of tubular long bones, usually in closed epiphyses around the knee and the distal.. Most giant cell tumors of the tendon sheath are moderately cellular and composed of sheets of rounded or polygonal cells that blend with hypocellular collagenized zones. Variable numbers of giant.. . This group includes aneurysmal bone cysts (ABC) and central giant cell granuloma (CGCG) amongst others The histology of ORU-CUT is similar in morphology to giant cell tumor of the bone, tendon sheath, and soft tissues and is composed of a population of mononuclear cells with intermixed or focally.. Introduction. Giant cell tumor (GCT) of bone was first described by Sir Astley Cooper in 1818 (, 1).Historically, the lesion has been referred to by numerous terms, including myeloid sarcoma, tumor of myeloplaxus, osteoblastoclastoma, and osteoclastoma (, 2-, 5).. GCT is a relatively common skeletal tumor, accounting for 4%-9.5% of all primary osseous neoplasms and 18%-23% of benign bone.
Giant cell tumor (GCT) of the soft tissue (GCT-ST) is a rare, unusual primary soft tissue tumor that is completely distinct from, and should not be confused with, any giant cell-rich tumor of bone. The histological appearance of the tumor is very variable and consists mainly of giant cells containing multiple nuclei as well as single nucleus stroma cells. Multicentric GCT of bone is histologically indistinguishable from solitary lesion; however, fibroblastic and fibrohistiocytic areas are considered to be a major component of these tumors [ 1 , 3 ]
Diagnosis of giant cell tumor of bone Conventional diagnostic methods of GCTB include its clinical, radiological and histopathological manifestations. Diagnostically, typical clinical manifestations of GCTB include regional pain, swelling and occasionally history of pathological fracture [ 21 ] Giant cell fibroblastomas are skin and soft tissue tumours that usually arise in childhood. They are sometimes seen in association with dermatofibrosarcoma protuberans (DFSP, hybrid lesions) or may transform or recur as DFSP.. Histology of giant cell fibroblastoma. In giant cell fibroblastoma, the tumour is based in the dermis or subcutis.There are striking sinusoidal spaces mimicking blood. Giant cell tumor of bone (GCTB) is a relatively rare, benign, but locally aggressive osteolytic skeletal neoplasm of young adults. First recognized in 1818 [ 1 ], it was not until 1940 that GCTB was formally distinguished from other tumors of bone, such as aneurysmal bone cyst, chondroblastoma, and nonossifying fibroma [ 2 ] A giant cell tumor of bone is a type of benign (noncancerous) tumor that typically occurs in young adults between the ages of 20 and 40. Most often, the tumors occur close to the knee joint—at the lower end of the thighbone (femur) or the upper end of the shinbone (tibia)
Giant cell tumor of tendon sheath; Nodular tenosynovitis ; Diagnostic Criteria. Circumscribed. Usually under 4 cm; May erode bone; Rare in skin; Mixed cell population Uniform round to oblong mononuclear cells. Cytologically bland; Mitotic figures rare to frequent High mitotic rate may predict recurrence; Multinucleated giant cells. Same nuclear. A giant cell tumor of the soft tissue is a tumor whose cytomorphology closely resembles that of a giant cell tumor of the bone. Many consider malignant giant cell tumors of the soft parts as histological variants of malignant fibrous histiocytomas Giant cell tumor along with secondary aneurysmal bone cyst of scapula: a rare presentation. Int J Shoulder Surg 2008;2(3):59-61. Crossref, Medline, Google Scholar; 15 Biscaglia R, Bacchini P, Bertoni F. Giant cell tumor of the bones of the hand and foot. Cancer 2000;88(9):2022-2032. Crossref, Medline, Google Scholar; 16 Yale JF, Kaplan JA
A giant cell tumor (GCT) is an expansile, osteolytic primary bone neoplasm containing giant cells. Giant cell tumors represent approximately 5% to 7% of all bone tumors. The majority of giant cell tumors arise in the ends of the long bones, the knee being the most common site; 3% to 7% of giant cell tumors occur in the spine, and 90% of spinal. Discussion. Primary giant cell tumor of soft tissue (GCTST) is a rare soft tissue tumor originally described in 1972 in 2 different series by Salm and Sissons  and Guccion and Enzinger .The lesion affects patients aged between 5-84 years, with no predilection for sex .It commonly involves the thigh, trunk, and upper extremities KEYWORDS: giant cell tumor of bone, malignancy in giant cell tumor of bone, postradiation sarcoma, osteosarcoma, malignant ﬁbrous histiocytoma, ﬁbrosar-coma. P rimary malignancy in giant cell tumor of bone (PMGCT) is ex-tremely unusual. Eight cases were reported by Nascimento et al.1 and ﬁve by the Mayo Clinic.2 Cases also have been. Giant Cell Tumor. Probably arise from zone of osteoclastic activity in skeletally immature patients Incidence ~ 4% of all primary bone tumors ~ 20% of benign skeletal tumors; Histology Multinucleated osteoclastic giant cells intermixed throughout a spindle cell stroma; Age > 98% after epiphyseal plate fusion . Most between 20 and 40 years. a giant cell tumor presenting as an eccentric lytic lesion in the medial epi- and metaphysis of the distal femur. There is a small transitional zone resulting in well-defined borders. Sagittal T1-weighted TSE images before and after Gd. The tumor extends to the subchondral bone plate with endosteal cortical involvement
8003/3 Malignant tumor, giant cell type 8004/3 Malignant tumor, spindle cell type 8005/3 Malignant tumor, clear cell type CARCINOMA, NOS 801 8010/2 Carcinoma in situ, NOS ICD-0-3 SEER SITE/HISTOLOGY VALIDATION LIST June 29, 2020 10 TONGUE (EXCL BASEOF TONGUE) C020-C024,C028-C029 NEOPLASM 800 8000/3 Neoplasm, malignant 8001/3 Tumor cells. Background The giant cell tumor (GCT) is a benign tumor which consists of three types cells: mononuclear histiocytic cells (MNHCs), multinuclear giant cells (MNGCs), and GCT stromal cells (GCTSCs). Numerous studies claim that GCTSCs have mesenchymal stem cells (MSCs) characters and play an important role in osteoclastogenesis; however, there are no research studies concerning macrophage. histology, and biological behavior between this case and previously reported cases of GCT-ST. Keywords head and neck, carotid body tumor, giant cell tumor of soft tissue, carotid, resection, tumor Introduction Giant cell tumor of soft tissue (GCT-ST) is a rare and unusual tumor named for its histological and clinical similarities to giant cell.
Conventional histology, aspiration cytology, and electron microscopy disclosed histiocyte-like cells, fibroblast-like cells, and multinucleated giant cells of both osteoclast-like benign and pleomorphic malignant type, in varying proportions. The histiocyte-like cells and the giant cells exhibited phagocytic activity at these examinations Giant cell tumor of the bone (GCT) is a challenging orthopedic disease representing 10-15% of all benign and 4-5% of all primary bone tumors .GCT has unpredictable biological behavior with locally destructive growth, frequent local recurrences, multifaceted histological appearance, and potential of pulmonary metastases [2,3,4].Sixty to eighty percent of all GCT are found in the third and. Primary malignant giant cell tumors of the bone are histologically distinguishable from giant cell-richosteosarcoma in the following ways:4) microscopic examination reveals that direct formation of osteoid by the malignant spindle cells is not seen in primary malignant giant cell tu mors of the bone, and an area of giant cell tumor is present in addition to verified areas ofsar comatous stroma
9250 = Giant Cell Tumor bone Malig 9538 = Papillary Meningioma 9750 = Malignant Histiocytosis 9251 = Malig Giant Cell Tumorsoftprt 9539 = Meningeal Sarcomatosis 9754 = Langerhans Cell Histiocyt 9252 = Malig TenosynovialGt celltum 9540 = Malig Periph NerveSheath tum 9755 = Histiocytic Sarcom Giant cell tumor of bone (GCTB) is a rare osteoclastogenic stromal tumor. GCTB can rarely undergo malignant transformation. This post hoc analysis evaluated and classified malignancies in patients with GCTB who received denosumab. This analysis was conducted on patients with pathologically confirmed GCTB and measurable active disease treated with denosumab 120 mg subcutaneously once every 4. A tenosynovial giant cell tumor has a characteristic appearance when examined under a microscope. These tumors are characterized by the presence of giant cells, which are large cells that typically contain more than one nuclei (the part of a cell that houses genetic material) Diagnosis of giant cell tumor of bone, aneurysmatic bone cysts with solid features and giant cell reparative granuloma. Histological slides/formalin-fixed paraffin-embedded tissue tumor blocks from archive available to perform the histology analysis; Written informed consent prior to any study-specific analysis and/or data collectio
Free Online Library: Giant cell tumor of the larynx: a case report with discussion of radiologic and histologic features.(RADIOLOGICAL CASE, Case study) by Applied Radiology; Health, general CAT scans Health aspects Usage CT imaging Giant cell tumors Care and treatment Case studies Diagnosis Patient outcomes Risk factors Nuclear radiation Tumors Histology and Histopathology Cellular and Molecular Biology Review The histogenesis of giant cell tumour of bone: a model of interaction between neoplastic cells and osteoclasts M.H. Zheng1, P. Robbins2, J. xu2, L. Huang,2 D.J. Wood2 and J.M. Papadimitriou2 1 Department of Orthopaedic Surgery and Pathology. University of Western Australia an We have reported a case of a nasopharyngeal giant cell tumor, which is an uncommon presentation of a rare soft tissue tumor. While surgery is the preferred treatment for this disease, the location of this tumor precluded resection. This has prompted the decision to employ systemic treatment with Zoledronic acid and subsequently Denosumab for. Giant cell tumour of bone (GCT) is a primary intramedullary neoplasm that accounts for 5% of skeletal tumours, composed by numerous multinucleated osteoclast-like giant cells evenly scattered throughout the mass and ovoid or spindle mononuclear stromal cells .GCT is generally considered a benign tumour, even though it is characterised by localised bone destruction due to the osteolytic. Primary Giant Cell Tumour of Soft Parts - Report of a Case with Fine Needle Aspiration Cytology and Histology Findings Mardi K*, Sharma J+ Abstract A cytohistopathological study of a rare case of giant cell tumour of soft tissues in a 30-year-old male patient is presented. The cytological features when evaluated in conjunction with clinical and.
David Creytens, Expression of H3.3 G34W Distinguishes Giant Cell Tumor of Bone From Its Major Giant Cell-containing Bone and Soft Tissue Mimics, in Particular Aneurysmal Bone Cyst and Giant Cell Tumor of Soft Tissue, Applied Immunohistochemistry & Molecular Morphology, 10.1097/PAI.0000000000000636, 28, 5, (e47-e48), (2020) Campanacchi Giant Cell Tumour, Bone & Soft tissue Tumours,; Springer Verlog 1990Unpredictable behaviour of GCT is not alwaysrelated to Radiographic & Histologicalappearances 38. HistologyBenign & Malignant can be differentiatedGrading is not validPrediction of clinical behaviour of GCT based onHistology is impossible Cancer 1980Rough guide.
A cytohistopathological study of a rare case of giant cell tumour of soft tissues in a 30-year-old male patient is presented. The cytological features when evaluated in conjunction with clinical and radiological features are sufficiently diagnostic. The primary knowledge of its existence and knowledge of its cytological features are important for a correct preoperative cytologic diagnosis cells injected subcutaneously into immunocompromised mice do not produce giant cells (22,24,25). Furthermore, tumor tissues grown on chick chorioallantoic membranes do not appear to recruit chicken monocytes to synthesize new giant cells despite increased vascularization from the membrane, and the survival time is typically 10 days (23) N2 - Background: Giant-cell tumour (GCT) of bone is a primary osteolytic bone tumour with low metastatic potential and is associated with substantial skeletal morbidity. GCT is rich in osteoclast-like giant cells and contains mononuclear (stromal) cells that express RANK ligand (RANKL), a key mediator of osteoclast activation
Although the majority of giant cell tumors (GCTs) of the bone occur in adult patients, occasionally they arise in the pediatric population. In this setting they may be mistaken for tumors more commonly seen in this age group, including osteosarcoma, aneurysmal bone cyst, and chondroblastoma. All ca On radiography and histology of frozen sections the lesion had the appearance of a conventional giant cell tumor of bone. After curettage, the permanent histology slides showed areas of highly malignant osteosarcoma juxtaposed to areas of benign giant cell tumor. The patient was treated with chemotherapy and wide resection of the tumor Giant cell tumor of bone (GCTB) is a benign but locally aggressive primary bone neoplasm. represents GCTB 4-5% of all primary bone tumors. The peak incidence is Fig. 4.Histology and immunohistochemistry of the tumor. Staining methods include (A), (B), hematoxylin and eosin, an A giant cell tumor of the bone is a relatively uncommon tumor. It accounts for about 5% of all biosied primary bone tumors. Of those giant cell tumors diagnosed, only about 2% will arise in the head and neck region. It is characterized by the presence of multinucleated giant cells on histology. Giant cell tumors are normally benign with. Introduction. Giant cell tumor of tendon sheath (GCTTS) is the second most common tumor of the hand, typically presenting in the third to fourth decade of life ().Also known as localized nodular tenosynovitis, GCTTS is characterized by diffuse presence of multinucleated giant cells and proliferation of synovial-like cells ().This benign lesion is predominantly found in the hand, followed by.
Giant cell tumour (GCT) is usually considered a benign entity. A small fraction of these tumours become malignant with time, and an extremely rare fraction may be malignant at onset. We report herein an unusual case of primary malignant GCT of the bone that relapsed locally with the same histology 14 years after a simple surgical curettage Histology: Characterized by proliferating histiocytes, moderately cellular (sheets of rounded or polygonal cells) hemosiderin (brown color) may be present, but typically less than seen with PVNS ; multinucleated giant cells are common ; Treatment: Operative . marginal excision. 5-50% recurrence rat GIANT CELL. TUMOUR. OSTEOCLASTOMA GIANT CELL TUMOUR IT is an aggressive lesion characterised by well vascularised tissue made up of plump spindly or ovoid cells in addition to numerous multinucleated giant cells uniformly dispersed through out the tumour tissue . This lesion represents about 5% of all primary bone tumours GIANT CELL TUMOUR It is distinct neoplasm of undifferentiate Giant cell reparative granuloma: Histology: Areas of multinucleated giant cells are admixed with fibrous tissue and reactive bone. There are several distinctive features of giant cell reparative granuloma. First, the giant cells are smaller than those of a typical giant cell tumor. Second, the giant cells are admixed with extravasated RBCs Giant Cell Tumor (GCT) or osteoclastoma is a benign bone neoplasm, of a locally aggressive mesenchymal nature, of uncertain biological behavior . It consists histologically of multinucleated giant cells dispersed in tumor tissue, whose nucleus has the same characteristic of the very vascularized ovoid and fusiform cells that form its stroma.
Note: Histology codes listed in this Histology Exclusion Table for this site are codes that are not TNM staged according to the AJCC 6th Edition Cancer Staging Manual. When a case is coded in Collaborative Staging and the histology is on the exclusion list, TNM will not be calculated but SEER algorithm Summary Stage 1977 and 2000 can be assigned A comprehensive question bank for indian medical PG preparations- AIIMS, ALL INDIA, JIPMER, PGI, state exams etc. Visual and audio content prepared in view of upcoming pattern of NEET (National Eligibility & Entrance Test) The malignant giant cell tumor of soft parts was characterized in a clini- copathologic survey of 32 human cases [l]. In man it is a rare extraskeletal malignant tumor somewhat resembling a giant cell tumor of bone. It has numerous multinucleated giant cells, histiocytes, fibroblasts and mononu Giant cell tumor of bone (GCTB) accounts for approximately 5% of all primary bone tumors .It usually involves the metaphyseal-epiphyseal region of long bones , and its incidence peaks in the third and fourth decade .The main treatment modality is surgery, consisting of curettage or en bloc resection
A giant cell tumor is one that is made up of a large number of benign (noncancerous) cells that form an aggressive tumor. It usually develops near a joint at the end of the bone. The location of a giant cell tumor is often in the knee, but can also involve the bones of the arms and the legs, or the flat bones such as the breastbone or pelvis Definition: Tenosynovial giant cell tumor (TGCT) or Giant cell tumor of tendon sheath (GCTTS) is the most common benign tumor of synovium and tendon sheath. Immunophenotypical evidence suggests it is of synovial cell origin. GCTTS is a relatively rare soft tissue tumour of uncertain histiogenesis. Complete local excision is the treatment of choice Giant cell tumor of bone is a nonmalignant but locally aggressive lesion. Vigilant follow-up after tumor removal is a cornerstone of management, as outlined in the below summary of factors guiding our approach to these lesions at Cleveland Clinic. Histology. Radiographs reveal a large radiolucent lesion, sometimes surrounded by a distinct.
determined to be a giant cell tumor. e lesion was curetted and the cavity was lled with bone gra ( Figure (b) ). Two months later, a biopsy of a swelling of the distal phalanx of the right th nger was diagnosed as a giant cell tumor by ourHistologyDepartment.Amputationofthedistalphalanx was performed. e patient fell two months later a er th Giant cell tumor of bone is a rare, fast-growing non-cancer tumor. It most often grows in adults between ages 20 and 40 when skeletal bone growth is done. It is slightly more common in women. It usually grows near a joint at the end of the bone. The location of a giant cell tumor is often in the knee, but can also grow in the bones of the arms. Introduction. Spindle cells are of mesenchymal origin, and form the body's connective tissue, fat, muscle, bone, cartilage and blood vessels.. The name 'spindle cell' refers to the shape of the cell on cytology and histology. Spindle cell tumours can be benign (suffix -oma) or malignant (suffix -sarcoma), and will arise from these different cell lines Giant cell tumor (GCT) is one of the most common benign bone tumors, which occurs in young adults 20-40 years old with a high recurrence rate and a potential for aggressive behavior. It is most commonly located at the metaphyseal or epiphyseal portion of the tibia or femur
Giant Cell Tumor of Soft Tissue (GCT-ST) is a low-grade soft tissue tumor occurring just below the skin and sometimes, extending deep into the tissues. The tumor is usually hard and painless GCT-ST usually affects the upper and lower limbs; other tumor areas include the trunk, head, and shoulder regio Histology of a fine needle aspiration and open biopsy were consistent with a benign giant cell tumor (GCT) of the bone. GCT of bone is an uncommon primary tumor typically presenting as a benign solitary lesion that arises in the end of the long bones. While GCT can occur throughout the axial and appendicular skeleton, it is exceedingly uncommon. (A) Histology of giant cell tumor under low power. (B) Histology of giant cell tumor under high power. Note characteristic giant cells. Diagnostic Studies. Standard radiographs show a soft tissue mass. Adjacent to the mass, cortical erosion, from the pressure effect of the mass, is seen. Bony erosion is not an uncommon finding with some giant.