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Diagnostics (Basel) 2021 May 26;11(6). Epub 2021 May 26.

Department of Neuroradiology, Klinikum Rechts der Isar, School of Medicine, Technical University of Munich, 81675 Munich, Germany.

The aim of this study is to assess whether perifocal bone marrow edema (BME) in patients with osteoid osteoma (OO) can be accurately detected on dual-layer spectral CT (DLCT) with three-material decomposition. To that end, 18 patients with OO (25.33 ± 12. Read More

Medicina (Kaunas) 2021 May 11;57(5). Epub 2021 May 11.

Department of Orthopedic Surgery, Good Samaritan Regional Medical Center, Corvallis, OR 97330, USA.

Osteoid osteomas are one of the most common bone tumors. Although benign in nature, they can cause significant pain and distress to the afflicted patient. The main goal of treatment is to relieve pain. Read More

BMC Musculoskelet Disord 2021 May 28;22(1):491. Epub 2021 May 28.

Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, 49 North Garden Road, Haidian District, 100191, Beijing, China.

Background: Osteoid osteoma (OO) of the acetabulum is a relatively rare disease. However, the the clinical outcomes of hip arthroscopy for treatment of OO of the acetabulum are still uncertain.

Methods: We evaluated consecutive patients who were diagnosed with OO of the acetabulum and who underwent hip arthroscopy at our hospital between January 2013 and March 2020. Read More

Eur J Radiol Open 2021 3;8:100349. Epub 2021 May 3.

Department of Radiology, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu, 41944, South Korea.

Osteoid osteoma is one of the osteoblastic benign bone tumors, which occurs frequently at the cortex of long bones, usually in the diaphysis or metadiaphysis. Although the tumor location in the bone varies, epiphyseal intramedullary osteoid osteoma has been rarely reported. Herein, we report a 14-year-old male patient with epiphyseal intramedullary osteoid osteoma, occurring at the distal radius, with magnetic resonance imaging findings. Read More

World J Clin Cases 2021 May;9(13):3063-3069

Department of Orthopedic Surgery, Keio University School of Medicine, Shinjuku-ku 160-8582, Tokyo, Japan.

Background: Intracortical chondroma of the metacarpal bone which could be painful is an extremely rare condition and previously only one case has been reported. Due to the similar physical features and appearance on clinical imaging, it is difficult to differentiate between intracortical chondroma and osteoid osteoma. Therefore, pathological examination is usually required to establish a definite diagnosis, which is often carried out only after tumor removal. Read More

Eur J Med Res 2021 May 7;26(1):42. Epub 2021 May 7.

Department of Rehabilitation, Hebei Provincial Academic of Traditional Chinese Medicine, Shijiazhuang, 050000, Hebei, China.

Background: Enchondromas originating in the epiphyses of long bones are rare and epiphyseal osteoid osteomas are also uncommon. Diagnosis can become elusive when enchondromas or osteoid osteomas occur in atypical locations and present with nonspecific clinical and imaging characteristics.

Case Presentation: We report a case of epiphyseal enchondroma of the left proximal femur in a 15-year-old girl with a 2-month history of left lower extremity pain. Read More

Int J Spine Surg 2021 Feb 29;14(s4):S26-S32. Epub 2020 Dec 29.

Rheumatology Department, Charles Nicolle Hospital, Tunis, Tunisia.

Osteoid osteoma (OO) is a benign tumor that usually occurs in long bones of young males. We report a rare case of spinal OO in a 25-year-old woman, revealed by a sciatica. Spinal radiographs and computed tomography scan were normal, although performed at 6 months of symptom evolution. Read More

Arthroscopy 2021 Apr 16. Epub 2021 Apr 16.

Department of Sports Medicine, Peking University Third hospital. Institute of Sports Medicine of Peking University, Beijing Key Laboratory of Sports Injuries, Haidian District, Beijing, China.

Purpose: To identify the clinical features of intra-articular osteoid osteoma (OO) of the hip, to evaluate the clinical effect of arthroscopic excision for intra-articular OO, and to summarize the characteristics of revision cases of hip OO and the revision surgery under arthroscopy in these cases.

Methods: We retrospectively reviewed the data of 25 patients who underwent arthroscopic excision of hip OO. The case series included 10 patients who underwent revision surgery. Read More

Clin Radiol 2021 Apr 14. Epub 2021 Apr 14.

Radio-diagnosis Department, Faculty of Medicine, South Valley University, Qena, Egypt.

Aim: To evaluate the ability of diffusion-weighted magnetic resonance imaging (DW-MRI) to differentiate between benign and malignant bony tumours.

Materials And Methods: This prospective study was conducted from October, 2018 to December, 2019. The study included 62 patients (37 male and 25 female) with clinically suspected bony lesions referred to the Radiology Department. Read More

Am J Case Rep 2021 Apr 17;22:e930902. Epub 2021 Apr 17.

Department of Pathology, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, South Korea.

BACKGROUND Osteoma is a benign bone tumor that typically arises in facial bones and less frequently in the long bones. It rarely occurs in the appendiceal skeleton. Pathologic findings are similar to those for parosteal osteosarcoma, periostitis ossificans, and osteoid osteoma. Read More

Eur J Orthop Surg Traumatol 2021 Apr 11. Epub 2021 Apr 11.

Diagnostic and Interventional Radiology, IRCCS Istituto Ortopedico Rizzoli, Via G.C.Pupilli, 1-40136, Bologna, Italy.

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. Therefore, the purpose of this literature review was to describe the main updates of these recent procedures in the field of interventional radiology, with particular attention paid to the results of the leading studies relating to the efficacy, complications, and recurrence rate. Read More

Orthopade 2021 Apr 8. Epub 2021 Apr 8.

Orthopädische Universitätsklinik, Klinikum Bad Bramstedt GmbH, Bad Bramstedt, Deutschland.

Background: Osteoid osteomas belong to the benign osseous neoplasia and can occur on the entire skeleton. The prolonged diagnosis of an osteoid osteoma of the great toe prompted us to prepare a case report with a literature review to identify possible sources of error and to contribute to a more expeditious diagnosis and therapy.

Literature: Currently, only two case reports on osteoid osteomas of the toes are known in the German literature. Read More

Semin Ultrasound CT MR 2021 Apr 29;42(2):134-149. Epub 2020 Aug 29.

Department of Musculoskeletal Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX.

We present a review of several bone (osteoid)-forming tumors including enostosis, osteoid osteoma, osteoblastoma, and osteosarcoma. These entities were chosen because they are reasonably common-neither seen every day nor rare. When applicable, recent information about the lesions is included. Read More

Cureus 2021 Feb 26;13(2):e13565. Epub 2021 Feb 26.

Medical Sciences, Keele University, Keele, GBR.

Background Bone tumours of the talus are a rare cause of ankle pain. This study aims to provide additional clinical clarity regarding the presentation and management of a minimally researched topic. Methods Sixteen patients were diagnosed with bone tumour of the talus between 2002 and 2020 following referral for ankle pain. Read More

PLoS One 2021 18;16(3):e0248589. Epub 2021 Mar 18.

Radiologia Interventistica, Istituto Nazionale Tumori IRCCS "Fondazione G. Pascale", Napoli (IT), Naples, Italy.

Purpose: To assess efficacy and safety of imaging-guided radiofrequency ablation (RFA) of Osteoid Osteoma (OO) in both typical and atypical sites.

Methods And Materials: Between January 2014 and March 2019, 102 consecutive percutaneous RFA were performed and retrospectively reviewed. The procedures were performed using a RFA bipolar ablation system (Covidien, exposed tip of 0. Read More

Asian J Neurosurg 2020 Oct-Dec;15(4):1037-1040. Epub 2020 Oct 19.

Department of Pathology and Lab Medicine, AIIMS, Bhubaneswar, Odisha, India.

Osteoid osteoma (OO) affecting the spine is one of the common causes of painful scoliosis in the growing age group. The involvement is usually in the posterior elements involving the lumbar and cervical spine. We report a case of OO affecting the body of the thoracic vertebral body. Read More

Br J Radiol 2021 May 18;94(1121):20201457. Epub 2021 Mar 18.

Department of Musculoskeletal Radiology, Leeds Teaching Hospitals, Leeds, UK.

Atraumatic fractures of femur, although not as common as traumatic fractures, are frequently encountered in the clinical practice. They present with non-specific symptoms and can be occult on initial imaging making their diagnosis difficult, sometimes resulting in complications. Overlapping terminologies used to describe these fractures may hamper effective communication between the radiologist and the clinician. Read More

Insights Imaging 2021 Mar 8;12(1):32. Epub 2021 Mar 8.

Department of Musculoskeletal Radiology, Fleury Medicina e Saúde Higienópolis, Rua Mato Grosso 306, 1st Floor, Higienópolis, São Paulo, SP, 01239-040, Brazil.

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, with variable intralesional mineralization, accompanied by bone sclerosis, cortical thickening and surrounding bone marrow edema, as well as marked enhancement with intravenous contrast injection. Read More

Radiol Case Rep 2021 May 24;16(5):1037-1041. Epub 2021 Feb 24.

Department of Orthopedic Surgery, University of Utah Health, 590 Wakara Way, Salt Lake City, UT 84108, USA.

A 15-year-old boy presented with left-sided hip pain and imaging consistent with the diagnosis of femoroacetabular impingement. Following hip arthroscopy, which included an osteochondroplasty, labral repair, and capsular repair, the patient's anterior hip pain improved. However, his deep aching hip pain persisted until an ischial osteoid osteoma was identified and treated with radiofrequency ablation. Read More

Medicina (Kaunas) 2021 Feb 12;57(2). Epub 2021 Feb 12.

Department of Orthopedic Surgery, Anam Hospital, Korea University College of Medicine, Seoul 02841, Korea.

Osteoid osteomas are benign bone-forming lesions that usually present in adolescence. In patients with severe pain and those not responding to medication, surgical treatment should be considered. Medulloscopy is a standard arthroscopic technique for visualizing the intramedullary canal of the tibia. Read More

Oper Neurosurg (Hagerstown) 2021 Feb 27. Epub 2021 Feb 27.

Department of Otolaryngology, University of Tennessee Health Science Center, Memphis, Tennessee, USA.

Background: Transoral robotic surgery (TORS) has become a routine technique for treating benign and malignant lesions of the oropharynx with the advantage of reducing morbidity compared to open surgical techniques. However, TORS has not been used routinely for accessing lesions of the spine.

Objective: To describe how TORS can be used to access spinal lesions. Read More

J Surg Case Rep 2021 Feb 15;2021(2):rjaa614. Epub 2021 Feb 15.

Cliniques universitaires Saint-Luc, Service d'orthopédie et de traumatologie de l'appareil locomoteur, Brussels, Belgium.

Osteoid osteoma is a benign bone tumor, found in young subjects with typical intense focal pain, nocturnal exacerbation and favorable response to salicylates. Painless osteoid osteomas are rare and their diagnosis is difficult, especially whether their imaging appearance is not typical. We report the case of a 13-year-old boy with a spontaneous painless lesion of the distal phalanx of a toe. Read More

Handchir Mikrochir Plast Chir 2021 Feb 15;53(1):76-81. Epub 2021 Feb 15.

Kepler Universitätsklinikum Linz, Abteilung für Kinderchirurgie.

A three-year-old girl experienced a fifteen-month odyssey before the surgical removal of an osteoid-osteoma at the distal phalanx of the thumb to relieve her pain. Osteoid-osteoma is a benign bone tumor rarely found in the hand and not yet described as occurring in a small child in extant literature. In one of the first x-ray examinations, a small foreign body was found in the soft tissues of the right thumb. Read More

PeerJ 2021 15;9:e10724. Epub 2021 Jan 15.

Department of Radiology, the First Medical Centre, Chinese PLA General Hospital, Beijing, China.

Background: The traditional treatment for osteoid osteoma is the nidus' surgical resection, which was difficult to eradicate with more invasive and complications because of osteosclerosis surrounding the nidus. This study aimed to analyze the efficacy and safety of percutaneous CT-guided cryoablation of osteoid osteoma at different sites (especially refractory sites such as the spine).

Methods: Fifteen patients with osteoid osteoma who underwent cryoablation at our institution were analyzed retrospectively on their imaging data and clinical visual analog scale (VAS) pain scores before and after the procedure. Read More

JBJS Case Connect 2020 12 10;10(4):e20.00132. Epub 2020 Dec 10.

Department of Orthopaedic Surgery, Beaumont Health, Royal Oak, Michigan.

Case: We report the case of a 15-year-old male patient presenting with persistent wrist pain after surgical treatment of a triquetral osteoid osteoma. The patient was found to have a persistent nidus. These tumors are difficult to observe intraoperatively or through fluoroscopy, limiting adequate resection and resulting in continued pain. Read More

Radiographics 2021 Mar-Apr;41(2):543-558. Epub 2021 Jan 22.

From the Division of Musculoskeletal Radiology, Laboratório Delboni Auriemo, Diagnósticos da América SA (DASA), R. Dr. Diogo de Faria 1379, Vila Clementino, São Paulo, SP 04037-005, Brazil (J.E.C.A., S.R.N.C., A.K.T., F.N.C., A.Y.S., A.Y.A.); Division of Musculoskeletal Radiology, Alta Diagnósticos, São Paulo, Brazil (J.E.C.A., S.R.N.C., A.K.T., A.Y.S.); Musculoskeletal Imaging Division, Hospital Israelita Albert Einstein, São Paulo, Brazil (A.K.T.); Department of Diagnostic Imaging, Federal University of São Paulo, São Paulo, Brazil (F.N.C., A.Y.A.); Division of Musculoskeletal Radiology, Hospital do Coração (HCor), São Paulo, Brazil (A.K.T., A.Y.S.); and Teleimagem, São Paulo, Brazil (A.K.T., A.Y.S.).

Spinal pain due to facet joint disease is difficult to diagnose since the clinical history and physical examination findings are usually nonspecific. Facet joint disorders have a wide range of causes and, because of the potential for chronic back pain and disability, an accurate diagnosis is essential. The most frequent cause of pain in facet joints is osteoarthritis, which can be assessed at radiography, CT, or MRI. Read More

SN Compr Clin Med 2020 Nov 14;2:2170-2177. Epub 2020 Sep 14.

Memorial Sloan Kettering Cancer Center, Department of Surgery, Orthopedic Oncology Service, 1275 York Ave, New York, NY 10065.

Object: To assess the impact of MRI findings on management of symptomatic patients following RFA of OO.

Materials & Methods: Retrospective review of 43 patients with RFA for OO between June 2010 and June 2017 was performed. Patient, nidus and ablation data were reviewed. Read More

Int J Surg Case Rep 2020 1;77:143-146. Epub 2020 Nov 1.

Department of Orthopedics, College of Medicine, Taibah University, Al-Madinah, Saudi Arabia. Electronic address:

Introduction: Osteoid osteoma is a benign tumor of bone that predominantly affects young age group. It can affect any bone, but lower extremities are more commonly involved more than the upper extremities and it rarely affects the scapular glenoid.

Presentation Of Case: The present case is an 18-year-old female patient who suffered from chronic right forearm and shoulder nocturnal pain for 5 years, which was sometimes relieved by non-steroidal anti-inflammatory drugs intake. Read More

Neuropediatrics 2021 04 27;52(2):105-108. Epub 2020 Oct 27.

Department of Biomedical, Metabolic and Neural Sciences, Neurosurgery Unit, Azienda Ospedaliero-Universitaria di Modena, Modena, Italy.

Osteoid osteoma is a benign osteoblastic tumor, quite uncommon in the spine. We report a case of an osteoid osteoma involving the atlas in a 6-year-old boy, who presented with suboccipital pain and torticollis. Initial radiological findings were ambiguous as magnetic resonance imaging showed mainly edema of upper cervical soft tissues. Read More

Medicina (Kaunas) 2020 Oct 13;56(10). Epub 2020 Oct 13.

Department of Orthopedic Surgery 1, SUNY Upstate Medical University, Syracuse, New York, NY 13210, USA.

Bone islands (BI; enostoses) may be solitary or occur in the setting of osteopoikilosis (multiple bone islands) and are sometimes associated with Gardner's Syndrome (osteopoikilosis and colonic polyposis). Characteristic features of bone islands are (1) absence of pain or local tenderness, (2) typical radio dense central appearance with peripheral radiating spicules (rose thorn), (3) Mean CT (computerized tomography) attenuation values above 885 Hounsfield units (HU) (4) absence of uptake on bone scan and (5) radiographic stability over time. However, when enostoses display atypical features of pain, unusual radiographic appearance, aberrant HU, increased radiotracer uptake, and/or enlargement, they can be difficult to differentiate from more sinister bony lesions such as osteoblastic metastasis, low grade central osteosarcoma, osteoid osteoma and osteoblastoma. Read More