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Tenosynovial giant cell tumor

From Wikipedia, the free encyclopedia

Tenosynovial giant cell tumor
Other namesLocalized: Localized pigmented villonodular synovitis (L-PVNS), Giant cell tumor of the tendon sheath (GCT-TS), Nodular tenosynovitis, Localized nodular tenosynovitis, and L-TGCT
Diffuse: Pigmented villonodular synovitis (PVNS), Conventional PVNS, and D-TGCT
Micrograph of diffuse TGCT, also known as pigmented villonodular synovitis. H&E stain.
SpecialtyOncology
SymptomsSwelling, pain, sensitivity, and/or limited range of motion
ComplicationsSpreading of tumors to surrounding tissues
TypesDiffuse and localized
Diagnostic methodMRI, biopsy, surgery
TreatmentSurgery, CSF1R inhibitors

Tenosynovial giant cell tumor (TGCT) is a group of rare, typically non-malignant tumors of the joints. TGCT tumors often develop from the lining of joints (also known as synovial tissue).[1][2][2]: 100[3][3]: 245.

Common symptoms of TGCT include swelling, pain, stiffness and reduced mobility in the affected joint or limb.[2]: 102 This group of tumors can be divided into different subsets according to their site, growth pattern, and prognosis.[4][4]: 361 Localized/nodular TGCT is sometimes referred to as giant cell tumor of the tendon sheath;[2]: 100 diffuse TGCT is also called pigmented villonodular synovitis (PVNS).[2]: 102These two distinct subtypes determined by radiographic appearance.[5] Localized TGCT is defined as a well circumscribed tumor while diffuse TGCT exhibits a locally aggressive and infiltrative behavior.[6]

Classification

Classification for TGCT encompasses two subtypes that can be divided according to site – within a joint (intra-articular) or outside of the joint (extra-articular) – and growth pattern (localized or diffuse) of the tumor(s).[2]: 100[4]: 361 Localized and diffuse subsets of TGCT differ in their prognosis, clinical presentation, and biological behavior, but share a similar manner of disease development.[2]: 100

Localized TGCT

Histopathology of localized TGCT arising in hand finger. H&E stain.

Localized TGCT is sometimes referred to as localized pigmented villonodular synovitis (L-PVNS), giant cell tumor of the tendon sheath (GCT-TS), nodular tenosynovitis, localized nodular tenosynovitis, and L-TGCT.[1]: 1[2]: 100

The localized form of TGCT is more common.[2]: 100[3]: 245 Localized TGCT tumors are typically 0.5 cm-4 cm),[2]: 101 develop over years,[2]: 100 are benign and non-destructive to the surrounding tissue, and may reoccur in the affected area.[2]: 101 The most common symptom is painless swelling.[2]: 101 Localized TGCT most often occurs in fingers, but can also occur in other joints.[2][7]

Diffuse TGCT

Micrograph of diffuse TGCT showing pigmented hemosiderin-laden macrophages (brown/red). H&E stain.

Diffuse TGCT is sometimes referred to as pigmented villonodular synovitis (PVNS), conventional PVNS, and D-TGCT.[1]: 1[4]: 361[8]: 1[2]: 102

Diffuse TGCT occurs less frequently and is locally aggressive (in some cases, tumors may infiltrate surrounding soft tissue).[3]: 245[1]: 1[2]: 102[8][8]: 1 It most commonly affects people under 40 years old, though the age of occurrence varies.[2]: 102 Diffuse TGCT may occur inside a joint (intra-articular) or outside of a joint (extra-articular). Intra-articular tumors typically occur in the knee (approximately 75% of cases) and hip (approximately 15% of cases).[2]: 102 Extra-articular tumors are usually found in the knee, thigh, and foot.[2]: 101 Symptoms include swelling, pain, sensitivity, and/or limited range of motion.[2]: 102 The rate of reoccurrence is estimated to be 18-46% for intra-articular tumors and 33-50% for extra-articular tumors.[2]: 103[8]: 1

Complications

Diffuse TGCT is locally aggressive and can spread to surrounding tissues, causing bone erosion and tissue damage. If not treated early, it can spread to areas outside the joint, extra-articular, and potentially cause permanent loss of range as well as intense pain.[9][10]

Mechanism

TGCT tumors grow due to genetic overexpression of colony stimulating factor 1. This causes colony-stimulating factor-1 receptor (CSF1R) cells to accumulate in the joint tissue.[11][12]

Diagnosis

TGCT can be diagnosed by magnetic resonance imaging (MRI), by biopsy, or during surgery.[13][14] The disorder is difficult to identify and is often not diagnosed for years due to nonspecific symptoms or a general paucity of symptoms.[15] TGCT cases are often misdiagnosed as osteoarthritis,[16] localized trauma,[17] sports injuries,[18][19] xanthomas,[20] or other conditions.[21] One study of 122 diffuse TGCT patients found that the average delay in diagnosis was 2.9 years.[22]

To identify or monitor using MRI, the minimum techniques required include T1 weighted images, T2 weighted images, and a fluid sensitive sequence.[23]

Treatment

Patients affected by TGCT should be managed within expert centers or reference networks, by a dedicated, experienced sarcoma multidisciplinary treatment team, including a pathologist, radiologist, orthopaedic surgeon, pain specialist, surgical, radiation and medical oncologists.[24] Patients initially treated at cancer centers have lower recurrence rates than those initially treated by community centers.[25]

Surgery has been the most common form of treatment for both localized[2]: 101[4]: 361 and diffuse TGCT.[2]: 103[4]: 361[8]: 1 After surgery, patients may receive physical therapy in order to help rehabilitate affected joints.[18][10] However, recurrence of TGCT after surgery is common,[16] with a higher rate of recurrence for diffuse TGCT than for localized TGCT.[4]: 361 In cases of recurrent or resistant disease, multiple surgeries, total joint arthroplasties, or amputation may be required.[8]: 1

A multidisciplinary approach, supplementing surgery or other treatments, can also improve outcomes in cases of recurrent TGCT.[26] In the late 2010s, treatment with CSF1R inhibitors emerged as an option[27] that may help improve functionality for patients with recurrent TGCT or TGCT that is not easily managed by surgery.[4]: 361An oral CSF-1R inhibitor pexidartinib is approved in the US and only available through a Risk Evaluation and Mitigation Strategy (REMS) Program,[28] and two other oral CSF-1R inhibitors, pimicotinib and vimseltinib are being developed in phase 3 trials.[29][30].

There is insufficient and contradictory evidence on radiation therapy, in the form of radiosynoviorthesis (yttrium injections) or external beam, before or after surgery and thus no recommendation for its use in TGCT can be made. [31]

For asymptomatic patients, active surveillance is the preferred method[32][33]. Active surveillance includes monitoring with MRI in intervals (e.g., every 6 months) to ensure the delay in treatment does not pose a potential harm[34]. This should be carefully weighed against the potential for over treatment.

Epidemiology

A study conducted in the Netherlands estimated that the worldwide incidence of TGCT is 43 cases per million person-years. The majority – 39 cases per million person-years – were estimated to be localized TGCT; the remaining 4 cases per million person-years were estimated to be diffuse TGCT.[7] TGCT can occur in patients of any age, but people with localized TGCT are typically between 30 and 50 years old,[2]: 100–101  while diffuse TGCT tends to affect people under the age of 40.[2]: 102–103 

See also

References

  1. ^ a b c d Lucas, David R. (2012). "Tenosynovial Giant Cell Tumor: Case Report and Review". Archives of Pathology & Laboratory Medicine. 136 (8): 901–906. doi:10.5858/arpa.2012-0165-CR. PMID 22849738.
  2. ^ a b c d e f g h i j k l m n o p q r s t u v w x y Fletcher, C. D.M.; Bridge, J.A.; Hogendoorn, P.; Mertens, F. (2013). WHO Classification of Tumours of Soft Tissue and Bone. Fourth Edition. World Health Organization. ISBN 9789283224341. Archived from the original on July 19, 2016.
  3. ^ a b c d Rateb, Kochbati; Hassen, Ben Ghozlen; Leila, Abid; Faten, Farah; Med Samir, Daghfous (2017). "Giant cell tumor of soft tissues: A case report of extra-articular diffuse-type giant cell tumor of the quadriceps". International Journal of Surgery Case Reports. 31: 245–249. doi:10.1016/j.ijscr.2016.12.019. PMC 5310176. PMID 28199932.
  4. ^ a b c d e f g h Ravi, Vinod; Wang, Wei-Lien; Lewis, Valerae O. (2011). "Treatment of tenosynovial giant cell tumor and pigmented villonodular synovitis". Current Opinion in Oncology. 23 (4): 361–366. doi:10.1097/CCO.0b013e328347e1e3. PMID 21577109. S2CID 1608847.
  5. ^ Stacchiotti, Silvia; Dürr, Hans Roland; Schaefer, Inga-Marie; Woertler, Klaus; Haas, Rick; Trama, Annalisa; Caraceni, Augusto; Bajpai, Jyoti; Baldi, Giacomo Giulio; Bernthal, Nicholas; Blay, Jean-Yves; Boye, Kjetil; Broto, Javier-Martin; Chen, Wei-Wu Tom; Dei Tos, Paolo Angelo (January 2023). "Best clinical management of tenosynovial giant cell tumour (TGCT): A consensus paper from the community of experts". Cancer Treatment Reviews. 112: 102491. doi:10.1016/j.ctrv.2022.102491. hdl:10067/1923310151162165141. PMID 36502615.
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