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Osteoid osteoma medscape

Osteoid Osteoma Treatment & Management - Medscap

Initial treatment of osteoid osteoma is nonoperative. Surgical intervention is generally indicated for patients whose pain is unresponsive to medical therapy, those who cannot tolerate prolonged.. Osteoid osteoma should be considered in any young patient with pain in the back or neck, painful scoliosis, or radicular or referred-type pain into the lower limb or shoulder. Its symptoms can.. Osteoid osteoma (OO) is a benign skeletal neoplasm of unknown etiology that is composed of osteoid and woven bone. It is typically found in children, adolescents, and young adults, with the age.. Osteoid osteoma elicits a profound osteoblastic response in surrounding medullary and cortical bone and shows the characteristic picture of sclerosis around a lucent nidus. It appears as cortical..

Osteoid Osteoma Clinical Presentation - Medscap

Osteoid Osteoma Imaging - Medscap

  1. g tumors that typically occur in children (particularly adolescents). They have a characteristic lucent nidus less than 1.5 or 2 cm and surrounding osteosclerotic reaction, which classically causes night pain that is relieved by the use of salicylate analgesia, e.g. aspirin
  2. Clinically, osteoid osteoma most commonly occurs in the long bones (eg, femur, tibia). The lesions cause night pain that is relieved with nonsteroidal anti-inflammatory drugs (NSAIDs)...
  3. Osteoid osteoma is a benign skeletal neoplasm of unknown etiology that is composed of osteoid and woven bone. The tumor is usually smaller than 1.5 cm in diameter. Osteoid osteoma can occur in any bone, but in approximately two thirds of patients, the appendicular skeleton is involved. The skull and facial bones are involved exceptionally
  4. Osteoid osteoma is a relatively frequent benign bone tumour, consisting of osteoid and woven bone, and surrounded by a halo of reactive sclerotic bone, with an average size of the nidus less than 1.5 cm. It is a condition of late childhood, adolescence and young adult age. It usually occurs in the a

Osteoid osteoma (OO) is a painful, benign and common bone tumor. Characteristic clinical and radiological findings are diagnostic, especially for lesions in typical locations. Some OO cases present atypical location and unusual imaging findings that can lead to misdiagnosis Of 263 patients undergoing RFA for osteoid osteoma over an 11-year period, 184 were male and 79 were female. Age range was two to 56 years. Most tumors were located in the lower extremities, and..

Intralesional excision has been considered the standard treatment for spinal osteoid osteoma (OO). Gasbarrini, et al. retrospectively reviewed treatment modalities of 81 cases of OO of the mobile spine [Spine (Phila Pa 1976). 2011 Nov 15;36(24):2089-93], and found that compared to conventional excision therapy, a minimally invasive approach by video-assisted endoscopy, microscope, or. Osteoid osteoma is a painful, benign, osteoblastic lesion that occurs in younger patients and affects the extremities or the axial skeleton. While plain film findings may suggest the diagnosis, in complex anatomical regions such as the spine, pelvis, wrist and foot advanced imaging modalities are often required Microscopic (histologic) description. Small, circumscribed. Anastomosing, irregular trabeculae or solid, sclerotic nidus of woven bone with variable mineralization. Rimmed by single layer of osteoblasts plus frequent osteoclasts. Loose, fibrovascular stroma. Surrounded by thick sclerotic bone Osteoid osteoma is a painful, benign and common bone tumor that is prevalent in young adults. The typical clinical presentation consists of pain that becomes worse at night and is relieved by. Osteoid osteoma is a painful, benign and common bone tumor that is prevalent in young adults. The typical clinical presentation consists of pain that becomes worse at night and is relieved by nonsteroidal anti-inflammatory drugs. The most common imaging finding is a lytic lesion, known as a nidus, w

Osteoid osteoma is a benign bone-forming lesion that occurs most often in the long bones of the lower extremities. They are very small tumors that do not grow larger than half an inch in diameter. They usually emerge sometime during the teenage years or early adulthood. Osteoid osteoma accounts for approximately 10% of benign bone tumors Osteoid osteoma is a tumor that usually involves the cortex of the bone, and is characterized by a central area called the nidus, which can potentially become sclerotic and mineralized, while the surrounding structures include interlacing trabeculae of woven bone and osteoblasts, as well as vascular connective tissue Orthopedic Oncology Course - Benign Bone Forming Tumors (Osteoblastoma, Osteoid Osteoma) - Lecture 3 Mohammed Al Sobeai Pathology - Osteoid Osteoma B 12/25/2016 622 views 5.0 (2) Login to View Community Videos Login to View Community Videos. Background: Osteoid osteoma is the third most common benign bone tumor and typically induces pain that is worse at night. Objective: To identify the epidemiological, pathogenetic, histological and radiological characteristics of osteoid osteoma and to present the broad variety of treatment options. Material and methods: This review article summarizes relevant clinical studies and meta-analyses.

Osteoid Osteoma Workup - Medscap

Osteoid osteoma is a benign bone tumor of the growing skeleton representing approximately 10% of all benign bone neoplasias [].It usually affects children and young adults [].Heine in 1927 [], Bergstrand in 1930 [], and Jaffe in 1935 [] identified osteoid osteoma as a clinical entity.Pain is often the only symptom of the disease and is typically described as mild and intermittent at first. CONCLUSIONS Osteoid osteoma of the upper extremity is a rare pathology which shall be considered in case of an increasing pain, especially in young men. A plain radiograph of the anatomically complex terrain of the hand and wrist is mostly not useful in diagnosis, whereas the CT examination can visualise even a small size nidus Osteoid Osteoma Treatment with MR Guided Focused Ultrasound (MRgFUS) Although osteoid osteomas may regress spontaneously over the course of years, current standard of care in patients whose pain is not controlled by medical therapy is a minimally invasive treatment with radiofrequency ablation Dr. Ebraheim's educational animated video describes the condition of Osteoid Osteoma.Follow me on twitter:https://twitter.com/#!/DrEbraheim_UTMCOsteoid osteo..

Osteoid osteoma was first described by Jaffe in 1935 and accounts for 10% of all benign bone tumors. It is neither locally aggressive nor does it have the potential for malignant transformation. This bone tumor frequently affects the long bones of the femur and tibia. This chapter will focus on oste Background. Osteoid osteoma (OO) was first reported by Jaffe in 1935 [] in a series of five cases; it is a painful, benign and common tumor, accounting for 3% of all bone neoplasms and 10-12% of benign lesions [2-5].It is particularly prevalent in Caucasian male adolescents and young adults; moreover, 50% of these tumors occur during the second decade of life, and they rarely occur before.

Osteoid osteomas consist of a nidus with surrounding sclerotic bone. The differential diagnosis covers a wide range of conditions due to the variable presentation of osteoid osteoma. The natural history is for regression to occur within 6 to 15 years with no treatment; however, this can be reduced t Osteoid Osteoma Treated with Minimally Invasive Technique of Radiofrequency Ablation Osteoid osteoma is a benign tumor of the bone. This tumor is most frequently found in the legs but may occur also at other bones in nearly any part of the body. Osteoid osteoma is a tumor of children and young adults, it is very rare in older adults over the age of 50. Diagnosing an Osteoid Osteoma Osteoid. Osteoid osteoma is the third most common benign neoplasm of bone, occurring predominantly in young, male patients ().In most of cases, the patients report inflammatory-like pain that worsens at night and is alleviated with the use of nonsteroidal anti-inflammatory drugs Osteoid osteoma is the third most common benign bone tumor, with well-known clinical presentation and radiological features. Although surgical excision has been the only therapeutic option for a long time, to date it has been replaced by minimally invasive techniques, which proved satisfactory success rates and low complication occurrence

Introduction. Osteoid osteoma is a unique benign tumor of the bones, which has seldom been described in the jaws. Although the true nature of this lesion is unknown, various reports suggest it usually occurs in young adults under 30 years of age. 1 Lichtenstein defined osteoid osteoma as a small, oval or roundish tumor like nidus which is composed of osteoid and trabeculae of newly formed. Clinically, it is difficult to differentiate osteoid osteoma, more than 50% of which occur in the fibia or tibia, from other diseases, i.e. spinal degenerative diseases, inflammatory and noninflammatory arthritis. In this case report, we presented an unusual case of lumbar osteoid osteoma in a 38-ye

An osteoid osteoma is a small bone tumor that usually occurs on the shin bone (tibia) and thigh bone (femur) or spine, but it can occur in any bone. The tumor is benign, which means it does not spread and isn't cancerous. It's not known what causes it. An osteoid osteoma is smaller than 2 centimeters. They usually occur in children over 4. Twenty-four patients were evaluated and diagnosed, between August 1975 and July 1989, as having probable osteoid-osteoma. Fifteen patients had operative treatment (twelve immediate and three delayed); all fifteen had complete relief of pain. The remaining nine patients were treated with non-steroida An osteoid osteoma is a benign bone-forming tumor that has no potential to become malignant. It classically causes severe pain at night relieved with nonsteroidal anti-inflammatory medications. Occasionally, it resolves without treatment. If it is painful, initial treatment consists of anti-inflammatory medications Medical management compared with operative treatment for osteoid-osteoma. Kneisl JS(1), Simon MA. Author information: (1)Department of Surgery, University of Chicago, Illinois 60637. Twenty-four patients were evaluated and diagnosed, between August 1975 and July 1989, as having probable osteoid-osteoma Introduction. Osteoid osteoma is a benign osteoblastic bone tumor that occurs most frequently in men and boys between 7- and 25-year old commonly arising from cortico-diaphyseal and metaphyseal regions of long bones.[] Most patients experience pain that worsens at night and is promptly relieved by the administration of salicylates.[] However, intra-articular osteoid osteomas are less frequent.

An osteoid osteoma is a vascular lesion consisting of an area of immature bone surrounded by osteoblasts and osteoclasts. The tumor starts with the nidus, or nest of vascular osteoid tissue in the center of the tumor. The nidus then becomes surrounded by reactive bone sclerosis Osteoid osteoma (OO) was first reported by Jaffe in 1935 [] in a series of five cases; it is a painful, benign and common tumor, accounting for 3% of all bone neoplasms and 10-12% of benign lesions [2,3,4,5].It is particularly prevalent in Caucasian male adolescents and young adults; moreover, 50% of these tumors occur during the second decade of life, and they rarely occur before the age of. Osteoid osteoma is a very painful benign bone tumor that affects young adults. It is exceptional before 5 and after 30 years of age. It can be seen in any part of the skeleton. Presentation of the. Osteoid Osteoma and Osteoblastoma Abstract Osteoid osteoma and osteoblastoma are commonly seen benign osteogenic bone neoplasms. Both tumors are typically seen in the second decade of life, with a notable predilection in males. Histologically, these tumors resemble each other, with characteristically increased osteoid tissue formation surrounded b Osteoid osteoma is a benign bone tumor of the growing skeleton representing approximately 10% of all benign bone neoplasias [].It usually affects children and young adults [].Heine in 1927 [], Bergstrand in 1930 [], and Jaffe in 1935 [] identified osteoid osteoma as a clinical entity.Pain is often the only symptom of the disease and is typically described as mild and intermittent at first.

Osteoid osteoma is a bone cancer that arises from the osteoblasts and some components of osteoclasts. Originally, it is a benign bone cancer and can originate in any part of the body. However, it usually occurs in the long bones i.e., thigh bones, bones of the hand, and sometimes in the bones of the spine Osteoid osteoma is a very painful benign bone tumor that affects young adults. It is exceptional before 5 and after 30 years of age. It can be seen in any part of the skeleton Osteoid osteoma is a benign tumor of the skeletal system which primarily targets younger individuals, and most commonly develops in long bones. Clinical presentation involves intense localized pain, which is often not relieved by analgesics. Diagnosis can be made by imaging studies such as CT scanning, and permanent effective treatment can be achieved through percutaneous surgical techniques WebPathology is a free educational resource with 11161 high quality pathology images of benign and malignant neoplasms and related entities Osteoid osteoma Osteoid osteoma, which tends to affect young people (commonly aged 10 to 35), can occur in any bone but is most common in long bones. [merckmanuals.com] Figure 1 — Osteoid osteoma , a benign bone-forming tumor, on the proximal right femur of a 17-year-old boy

Osteoid osteoma. - Medscap

Introduction. Osteoid osteoma and osteoblastoma are rare, benign, bone-forming tumours that account for about 12% and 3%, respectively, of all benign bone tumours , .In the past, these two tumours were classified as variants of a single tumour type, based on a number of shared histological features , , .Lesion size was long used as a discriminating criterion, with osteoid osteomas believed to. Osteoid osteoma refers to bone-like tumors that grow on the spine and long bones, such as the thigh and shin bones. These tumors are benign and not cancerous. Although they do not grow, spread, or invade other organs, they can lead to back pain and other signs and symptoms. The cause of osteoid osteoma is still unknown Osteoid Osteoma. Osteoid Osteoma is a benign, bone forming neoplasm. It has a small nidus of neoplastic tissue surrounded by heavy zone of reactive mature bone. This benign tumor is usually located intracortically within the diaphysis of long bones. Osteoid osteoma affects males more than females, and 70% of patients are younger than 20 years old

What are osteoid osteoma spinal tumors? - Medscap

  1. Osteoid osteoma (OO) is a benign osteogenic lesion, regularly noticed in young individuals. A solitary lesion most frequently appears in long bones but is extremely rare in jawbones. Pain is a distinguishing characteristic of this lesion. Herein, we report a rare case of an OO in the right maxilla of a 37-year-old male presenting as pain associated with dental implants
  2. Osteoid Osteoma & Seizure Symptom Checker: Possible causes include Pineal Gland Cyst. Check the full list of possible causes and conditions now! Talk to our Chatbot to narrow down your search
  3. g) tumor that is usually less than 2cm in size. It consists of a central vascularized nidus that represents the neoplastic tissue. The nidus is surrounded by normal reactive bone. It is usually a single lesion that is very painful. The nidus microscopically resembles the same type of tissue.

Osteoid osteoma 1. OSTEOID OSTEOMA19 Yr old male withpain in in the dorsalaspect of the medial aspect of left mid foot . o/e there is pain over the FREE LANCE RADIOLOGYmentioned part of the Basic approach for left mid foot An osteoid osteoma is a type of bone tumor. It isn't cancer (benign). It remains in the same place it starts. It won't spread to other bones or parts of your body. The center of an osteoid osteoma is the nidus. It consists of growing tumor cells, blood vessels, and cells that over time form bone. A bony shell surrounds the nidus Osteoid osteoma is a benign bone tumor of small size, described for the first time by Jaffe in 1935. It represents 10 to 12 % of benign bone tumors; it usually affects individuals during the first three decades of life, with a predominance in males [].It is characterized by the presence of a central hypervascular nidus which may calcify An osteoid osteoma is a rare benign tumor of the carpal bones. It is extremely rarely found in the lunate bone in patients above 30 years of age. We present a case report of a 61-year-old man with.

Osteoid Osteoma of the Coracoid Process - Medscap

  1. Osteoid osteoma is a small, benign but painful lesion with specific clinical and imaging characteristics. Computed tomography is the imaging modality of choice for visualization of the nidus and for treat-ment planning. Complete surgical excision of the nidus is curative
  2. Osteoid osteoma: A benign tumor of bone tissue. Osteoid osteoma emerges most often in a person?s teens or 20s and is found most frequently in the femur and in males. Symptoms include pain, mostly at night. Diagnosis is made via X-ray. Most cases do not require invasive treatment, but just the use of analgesics to treat pain
  3. An osteoid osteoma is a non-cancerous bone tumor. As a benign tumor, these can cause pain and discomfort, but will not spread to other parts of the body. These tumors usually develop in the long bones of the body, such as the femur and tibia (shinbone), they affect both men and women equally, and are diagnosed across races
  4. This lecture explain pathology, clinical presentation, imaging and treatment of osteoid osteoma in childre
  5. imally invasive, image-guided procedure called radiofrequency ablation. During this procedure we direct a probe into the tumor and heat it up for.
  6. Osteoid osteoma is a common benign tumor that usually develops in the long bones of the leg — the femur (thigh bone) and tibia (shin bone) - but can occur in any bone. While osteoid osteoma can occur at any age, it is more common between the ages of 5 and 25, and nearly three times as likely to affect boys as girls
  7. g neoplasm, first described by Jaffe in 1935 [1]. Approximately 10% of all benign bone tumors are osteoid osteomas [2, 3]. Any portion of the skeleton may be involved, but it is often found (50-60% of cases) in the long bones of the lower extremity [3] and (between 19 and 31% of the cases) upper.

Clinical and morphological characteristics of osteoid

  1. Osteoid osteoma is a small, benign bone tumor that characteristically causes nocturnal pain, which can be relieved by NSAIDs. The tumor typically involves the diaphysis/metaphysis of a long tubular bone and occasionally occurs in the posterior vertebrae. Osteoid osteoma is more common in the second to third decade of life, with a 3:1 male-to.
  2. Osteoid osteoma was firstly described by Jaffe in 1935. It is a small, benign osteoblastic tumor, comprising 12% of the benign osseous tumors. Osteoid osteoma is characterized by varying intermixtures of osteoid, newly formed bone, and highly vascular supporting osseous tissue (nidus) surrounded by a distinctive surrounding zone of reactive.
  3. g tumour characterized by small size, limited growth potential and disproportionate pain (WHO, 2002). Usually, OO is solitary, although the literature shows few reports of multiples lesions in the same patient, but not concomitant
  4. antly in young, male patients (1). In most of cases, the patients report inflammatory-like pain that worsens at night and is alleviated with the use of nonsteroidal anti-inflam-matory drugs. Osteoid osteoma is classically characterized at con
  5. Osteoid osteoma do, however, typically cause a large amount of reactive bone to form around them. Osteoid osteoma also make a new type of abnormal bone material called osteoid bone. This osteoid bone, along with the tumor cells, forms the nidus of vascular osteoid with surrounding sclerotic bone, which is a clear spot seen on x-rays
  6. istration of salicylates ().The term nidus, which was described as the core or niduslike focus by Jaffe in 1953 (), refers to the tumor itself and is composed of bone.

[Osteoid osteoma of the hand and wrist]

  1. Osteoid osteoma is a benign osteoblastic neoplasm typically smaller than 1.5 cm. The condition was first described in 1930 by Bergstrand [], and Jaffe [] first characterized osteoid osteoma as a discrete clinical entity in 1935.Its pathologic hallmark is an osteoidrich nidus surrounded by vascular connective tissue
  2. Published May 30, 2021. What is osteoid osteoma? An osteoid osteoma is a small, benign bone tumor that forms in our body's long bones, such as the femur or thighbone and tibia or shinbone. Moreover, it usually affects the legs, hands, fingers, and spine. This is more common in youngsters, particularly teens, and is rarely seen in adults aged 50 and up
  3. Osteoid osteoma - spine. Case contributed by Dr Anisha Sawkar Tandon. Diagnosis probable Diagnosis probable . Presentation. Mid thoracic back pain for the last 6 months with no evidence of trauma, weight loss or fever. Partial relief with analgesics was reported. Patient Data. Age: 20 year
  4. The natural history of osteoid osteoma with a report of twenty cases. Journal of Bone and Joint Surgery 36-B, 218-229 1954. PubMed Google Scholar. Freiberger R. H., Lortman B. S., Helgerm M., Thompson T. C.: Osteoid osteoma. A report on 80 cases. American Journal of Roentgenology 82, 194-205 1959
  5. g tumors and typically present during the second decade of life. They have no malignant potential, but osteoblastoma can behave locally aggressive [1, 2].Both lesions are more or less histologically indistinguishable, and distinction is predo
  6. Osteoid osteoma accounts for about 10% of all benign bone tumours. The most common location is the femur, with 40% of cases , but many other sites can be involved. The acetabular fossa is one of the uncommon locations, with three of 448 cases according to Campanacci . Pain is the presenting symptom
  7. Osteoid Osteoma. An osteoid osteoma is a benign (noncancerous) bone tumor that usually develops in the long bones of the body, such as the femur (thighbone) and tibia (shinbone). Although osteoid osteomas can cause pain and discomfort, they do not spread throughout the body. Osteoid osteomas can affect people of all ages, but they occur more.
Osteoma

Osteoid osteoma Radiology Reference Article

Sujit Jos, Consultant Orthopaedician (Joint Replacements & Sports Injuries) at MOSC Hospital and Medical College, Kolenchery, Kochi, Kerala at MOSC Hospital and Medical College, Kolenchery, Koch On November 27, 2020, the Food and Drug Administration approved the Sonalleve MR-HIFU system (Profound Medical Inc.) for the treatment of osteoid osteoma in the extremities Osteoid osteoma is a solitary benign tumour of the bone that classically affects men (M:F 2-3:1) in their second decade.1 The pain that usually peaks at night in this condition is attributed to the prostaglandins that are released by the tumour.2 Though characteristics of pain, response to NSAIDs and radiological features make the diagnosis certain1 involvement of pelvic bones is uncommon in. The double-density sign, seen on radionuclide bone scans, is described for diagnosing osteoid osteomas and for localizing the nidus. Its use in differentiating the nidus of an osteoid osteoma from osteomyelitis is also described. The utility of computed tomography in localization of the nidus is also illustrated An osteoid osteoma is a relatively common non-cancerous bone tumour. These tumours are usually small (less than 2 cm) and are most frequently found in the bones of the legs, arms, spine, hands, and feet. They generally occur in children and young adults but can occasionally occur in older adults

Tumors » SONSA

Osteoid osteoma and osteoblastoma

Osteoid osteoma (OO) is the most common benign bone tumor. It constitutes 10-12% of benign bone tumors and 2-3% of primary bone tumors . This tumor has a low growth potential and is usually less than 1 cm in diameter. Histologically, nidus was found in 85% of osteoid osteoma cases . Osteoid osteoma can be observed in many bones in the body, but. Ontology: Osteoid osteoma (C0029441) Definition (NCI) A small benign bone-forming neoplasm characterized by the presence of differentiated osteoblasts. The tumor is usually surrounded by hypervascular sclerotic bone and has limited growth potential. Clinical signs and symptoms include pain and localized tenderness, at the site of the lesion Osteoid = a substance produced by cells that make new bone Osteoma = a type of tumor that develops in bones. Osteoid osteomas are small, benign bone tumors. Osteoid osteomas most commonly occur in the legs, hands, fingers, and spine. At the Spine Hospital at the Neurological Institute of New York, we specialize in osteoid osteomas of the spine We present a case series of four children, younger than 3 years old, with osteoid osteoma of the lower limb. Pain and limping were the main symptoms. With careful clinical examination, we could localize the affected area. Radiological evaluation revealed cortical thickening in 3 children. On MRI examination, we found extensive edema, with normal bony cortices Osteoid osteoma is a small benign bone tumor that arises from osteoblasts, which was first described by Jaffe in 1935 1 as a smaller version of an osteoblastoma. A tumor size of <1.5 cm was regarded as an osteoid osteoma, while a tumor of >1.5 cm was regarded as an osteoblastoma

Osteoid Osteoma Imaging - emedicine

Osteoid osteoma is a painful, benign, osteoblastic lesion that occurs in younger patients and affects the extremities or the axial skeleton. While plain film findings may suggest the diagnosis, in complex anatomical regions such as the spine, pelvis, wrist and foo An osteoid osteoma is a benign (non-cancerous) bone tumor that arises from osteoblasts and some components of osteoclasts. It was originally thought to be a smaller version of an osteoblastoma.Osteoid osteomas tend to be less than 1.5 cm in size. The tumor can be in any bone in the body but are most common in long bones, such as the femur and tibia

Osteoid osteoma - PubMe

Osteoma of the paranasal sinuses is a common benign tumor, usually found incidentally. Epidemiology Osteomas are commonly found in patients undergoing imaging of the sinuses, appearing in up to 3% of CT examinations of the paranasal sinuses 1.. Osteoid Osteoma - Bone scan • A bone scan is helpful in detecting the doubledensity sign, which is a focal area of increased activity with a second smaller area of increased uptake superimposed on it, is said to be diagnostic of osteoid osteoma. 11. Osteoid Osteoma - MRI • MRI has not been useful in the diagnosis of osteoid osteoma

Osteoid osteoma of the femoral head treated byOsteoid Osteoma - Pathology - OrthobulletsOsteoid Osteoma Imaging: Practice Essentials, RadiographyOsteoma, OsteoidOsteoid osteoma pada tulang paha | Medianers

RESULTS: CT was more accurate than MR imaging in detection of the osteoid osteoma nidus in 63% of cases. MR imaging was better than CT in showing intramedullary and soft-tissue changes in all cases. This may produce a misleading aggressive appearance on MR images. There was a statistically significant correlation between presence or absence of. Osteoid osteoma is benign tumor of the bone which typically causes nocturnal pain, classically alleviated by aspirin. It shows typical focal intense radiotracer uptake on a bone scan. This patient was successfully treated with radiofrequency ablation of the lesion Osteoid osteoma typically affects young individuals. Typical radiological appearance is a small well defined lucency with a small central nidus and surrounding periosteal reaction with or without soft tissue reaction. The patients present with pain, more in night that is typically relieved by salicylates. When occurring close to a joint the. Osteoid osteoma rarely presents with multicentric involvement; Radiographic findings: Lesions involve medulla, cortex, subcortical bone or even bone surface; In long bones-lesion is located in cortex with nidus appearing as oval lucency which is well demarcated and may have variable meneralization; Central lucency may show calcification with.