STBT5:Volunteer Assignments and Opportunities

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WHO Classification of Soft Tissue and Bone Tumours (5th edition) Content
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes

CHAPTER 2 (SOFT TISSUE TUMOURS)










Lipoma Disease
Lipomatosis Disease
Lipomatosis of nerve Disease
Lipoblastoma and lipoblastomatosis Disease
Angiolipoma Disease
Myolipoma of soft tissue Disease
Chondroid lipoma Disease
Spindle cell lipoma and pleomorphic lipoma Disease
Hibernoma Disease
Atypical spindle cell / pleomorphic lipomatous tumour Disease
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Atypical lipomatous tumour / well-differentiated liposarcoma Disease Kauser Begum Ravishankar (trainee), with Katie 2/25/2026 5/25/2026 PENDING Katie Schieffer
Dedifferentiated liposarcoma Disease
Myxoid liposarcoma Disease Karla Sofía Peláez Valdés (trainee);

Katie Schieffer (mentor)

3/1/2026 PENDING Katie Schieffer
Pleomorphic liposarcoma Disease
Myxoid pleomorphic liposarcoma Disease
Nodular fasciitis Disease
Proliferative fasciitis and proliferative myositis Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/8/2025 Katie Schieffer 12/8/2025 Minimal genetic content added
Myositis ossificans and fibro-osseous pseudotumour of digits Disease
Ischaemic fasciitis Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 10/16/2025 Katie Schieffer 10/16/2025 No genetic association
Elastofibroma Disease
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Fibrous hamartoma of infancy Disease
Fibromatosis colli Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 9/22/2025 Katie Schieffer 9/22/2025 No genetic association
Juvenile hyaline fibromatosis Disease
Inclusion body fibromatosis Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 10/16/2025 Katie Schieffer 10/16/2025 No genetic association
Fibroma of tendon sheath Disease
Desmoplastic fibroblastoma Disease
Myofibroblastoma Disease
Calcifying aponeurotic fibroma Disease
EWSR1-SMAD3-positive fibroblastic tumour (emerging) Disease
Angiomyofibroblastoma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 10/21/2025 Katie Schieffer 10/21/2025
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Cellular angiofibroma Disease
Angiofibroma of soft tissue Disease
Nuchal-type fibroma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/8/2025 Katie Schieffer 12/8/2025 No genetic association
Acral fibromyxoma Disease
Gardner fibroma Disease
Palmar fibromatosis and plantar fibromatosis Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/12/2025 Katie Schieffer 12/12/2025 Minimal genetic content added
Desmoid fibromatosis Disease
Lipofibromatosis Disease
Giant cell fibroblastoma Disease
Dermatofibrosarcoma protuberans Disease He Fang 2/19/2026 5/20/2026 PENDING Katie Schieffer
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Solitary fibrous tumour Disease Yiting Li (trainee);

Shashirekha Shetty (mentor)

9/24/2025 12/24/2025 COMPLETE 12/18/2025 Katie Schieffer 12/18/2025
Inflammatory myofibroblastic tumour Disease Katherine Geiersbach 8/11/2023 11/11/2203 COMPLETE 1/8/2025 Katherine Geiersbach 1/8/2025
Low-grade myofibroblastic sarcoma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/10/2025 Katie Schieffer 12/10/2025 No genetic association
Superficial CD34-positive fibroblastic tumour Disease
Myxoinflammatory fibroblastic sarcoma Disease Mokhtar Abdelhammed, MD (trainee);

Katie Schieffer (mentor)

3/1/2026 6/30/2026 COMPLETE 3/3/2026 Katie Schieffer 3/4/2026
Infantile fibrosarcoma Disease Katie Schieffer 4/21/2025 10/1/2025 COMPLETE 9/18/2025 Katie Schieffer 9/18/2025
Adult fibrosarcoma Disease
Myxofibrosarcoma Disease
Low-grade fibromyxoid sarcoma Disease
Sclerosing epithelioid fibrosarcoma Disease
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Tenosynovial giant cell tumour Disease
Deep fibrous histiocytoma Disease
Plexiform fibrohistiocytic tumour Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/8/2025 Katie Schieffer 12/8/2025 No genetic association
Giant cell tumour of soft tissue Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/10/2025 Katie Schieffer 12/10/2025 No genetic association
Synovial haemangioma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 11/10/2025 Katie Schieffer 11/10/2025 No genetic association
Intramuscular angioma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/10/2025 Katie Schieffer 12/10/2025 No genetic association
Arteriovenous malformation/haemangioma Disease
Venous haemangioma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/10/2025 Katie Schieffer 12/10/2025 No genetic association
Anastomosing haemangioma Disease
Epithelioid haemangioma Disease
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Lymphangioma and lymphangiomatosis Disease
Tufted angioma and kaposiform haemangioendothelioma Disease
Retiform haemangioendothelioma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/11/2025 Katie Schieffer 12/11/2025 Minimal genetic content added
Papillary intralymphatic angioendothelioma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/11/2025 Katie Schieffer 12/11/2025 Minimal genetic content added
Composite haemangioendothelioma Disease
Kaposi sarcoma Disease
Pseudomyogenic haemangioendothelioma Disease
Epithelioid haemangioendothelioma Disease
Angiosarcoma Disease
Glomus tumour Disease
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Myopericytoma, including myofibroma Disease
Angioleiomyoma Disease
Leiomyoma Disease
EBV-associated smooth muscle tumour Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/12/2025 Katie Schieffer 12/12/2025 No genetic association
Inflammatory leiomyosarcoma Disease
Leiomyosarcoma Disease
Rhabdomyoma Disease
Embryonal rhabdomyosarcoma Disease
Alveolar rhabdomyosarcoma Disease
Pleomorphic rhabdomyosarcoma Disease
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Spindle cell / sclerosing rhabdomyosarcoma Disease
Ectomesenchymoma Disease
Gastrointestinal stromal tumour Disease Shanmugapriya Veeralakumar (trainee); Katie as mentor 2/23/2026 PENDING Katie Schieffer
Soft tissue chondroma Disease
Extraskeletal osteosarcoma Disease
Schwannoma Disease
Neurofibroma Disease
Perineurioma Disease
Granular cell tumour Disease
Dermal nerve sheath myxoma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/11/2025 Katie Schieffer 12/11/2025 No genetic association
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Solitary circumscribed neuroma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/11/2025 Katie Schieffer 12/11/2025 No genetic association
Ectopic meningioma and meningothelial hamartoma Disease
Benign triton tumour / neuromuscular choristoma Disease
Hybrid nerve sheath tumour Disease
Malignant peripheral nerve sheath tumour Disease
Malignant melanotic nerve sheath tumour Disease
Intramuscular myxoma Disease
Juxta-articular myxoma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/12/2025 Katie Schieffer 12/12/2025 No genetic association
Deep (aggressive) angiomyxoma Disease
Atypical fibroxanthoma Disease
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Angiomatoid fibrous histiocytoma Disease
Ossifying fibromyxoid tumour Disease
Myoepithelioma, myoepithelial carcinoma, and mixed tumour Disease
Pleomorphic hyalinizing angiectatic tumour of soft parts Disease Mokhtar Abdelhammed, MD (trainee);

Katie Schieffer (mentor)

9/11/2025 12/11/2025 COMPLETE 12/29/2026 Katie Schieffer 1/7/2026
Haemosiderotic fibrolipomatous tumour Disease Mokhtar Abdelhammed, MD (trainee);

Katie Schieffer (mentor)

3/1/2026 6/30/2026 PENDING
Phosphaturic mesenchymal tumour Disease
NTRK-rearranged spindle cell neoplasm (emerging) Disease James Solomon, MD, PhD 2/20/2022 12/9/2025 COMPLETE 2/26/2026 Katie Schieffer 2/26/2026
Synovial sarcoma Disease
Epithelioid sarcoma Disease
Alveolar soft part sarcoma Disease Maxine Sutcliffe, PhD 10/13/2025 12/31/2025 COMPLETE 12/24/2025 Katie Schieffer 12/24/2025
Clear cell sarcoma of soft tissue Disease
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Extraskeletal myxoid chondrosarcoma Disease
Desmoplastic small round cell tumour Disease Maxine Sutcliffe, PhD 1/12/2026 4/12/2026 PENDING
Extrarenal rhabdoid tumour Disease
PEComa Disease
Intimal sarcoma Disease
Undifferentiated sarcoma Disease

CHAPTER 3 (UNDIFFERENTIATED SMALL ROUND CELL SARCOMAS OF BONE AND SOFT TISSUE)










Ewing sarcoma Disease Sadeem Qdaisat (trainee); Eric McGinnis (mentor) 10/1/2023 12/9/2025 PENDING Katie Schieffer
Round cell sarcoma with EWSR1-non-ETS fusions Disease
CIC-rearranged sarcoma Disease
Sarcoma with BCOR genetic alterations Disease He Fang 2/19/2026 8/20/2026 PENDING Katie Schieffer
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes

CHAPTER 4 (BONE TUMOURS)










Subungual exostosis Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/12/2025 Katie Schieffer 12/12/2025 No genetic association
Bizarre parosteal osteochondromatous proliferation Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 12/8/2025 Katie Schieffer 12/8/2025
Periosteal chondroma Disease
Enchondroma Disease
Osteochondroma Disease
Chondroblastoma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 11/14/2025 Katie Schieffer 11/14/2025
Chondromyxoid fibroma Disease
Osteochondromyxoma Disease
Synovial chondromatosis Disease
Central atypical cartilaginous tumour / chondrosarcoma, grade 1 Disease Katie Schieffer 9/21/2025 12/31/2025 COMPLETE 11/14/2025 Katie Schieffer 11/14/2025
Secondary peripheral atypical cartilaginous tumour / chondrosarcoma, grade 1 Disease
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Central chondrosarcoma, grades 2 and 3 Disease
Secondary peripheral chondrosarcoma, grades 2 and 3 Disease
Periosteal chondrosarcoma Disease
Clear cell chondrosarcoma Disease
Mesenchymal chondrosarcoma Disease
Dedifferentiated chondrosarcoma Disease
Osteoma Disease
Osteoid osteoma Disease
Osteoblastoma Disease
Low-grade central osteosarcoma Disease
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Osteosarcoma Disease Fang Fang (trainee); Katie Schieffer (mentor) 11/19/2025 4/15/2026 PENDING Katie Schieffer
Parosteal osteosarcoma Disease
Periosteal osteosarcoma Disease
High-grade surface osteosarcoma Disease
Secondary osteosarcoma Disease
Desmoplastic fibroma of bone Disease
Fibrosarcoma of bone Disease
Haemangioma of bone Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 11/14/2025 Katie Schieffer 11/14/2025 No genetic association
Epithelioid haemangioma of bone Disease See STBT5: Epithelioid haemangioma page N/A N/A N/A N/A N/A N/A
Epithelioid haemangioendothelioma of bone Disease See STBT5: Epithelioid haemangioendothelioma page N/A N/A N/A N/A N/A N/A
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Angiosarcoma of bone Disease See STBT5: Angiosarcoma page N/A N/A N/A N/A N/A N/A
Aneurysmal bone cyst Disease
Giant cell tumour of bone Disease
Non-ossifying fibroma Disease
Benign notochordal cell tumour Disease
Conventional chordoma Disease
Dedifferentiated chordoma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 11/14/2025 Katie Schieffer 11/14/2025 No genetic association, early genetic studies referenced
Poorly differentiated chordoma Disease
Chondromesenchymal hamartoma of chest wall Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 11/14/2025 Katie Schieffer 11/14/2025 No genetic association
Osteofibrous dysplasia Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 10/22/2025 Katie Schieffer 10/22/2025
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Adamantinoma of long bones Disease
Simple bone cyst Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 10/21/2025 Katie Schieffer 10/21/2025
Fibrocartilaginous mesenchymoma Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 10/21/2025 Katie Schieffer 10/21/2025
Fibrous dysplasia Disease
Lipoma and hibernoma of bone Disease
Leiomyosarcoma of bone Disease See STBT5: Leiomyosarcoma page N/A N/A N/A N/A N/A N/A
Undifferentiated pleomorphic sarcoma Disease Maxine Sutcliffe 2/23/2026 4/12/2026 COMPLETE 4/27/2026 Katie Schieffer 4/28/2026
Bone metastases Disease Katie Schieffer 9/21/2025 12/21/2025 COMPLETE 10/21/2025 Katie Schieffer 10/21/2025
Solitary plasmacytoma of bone Disease
Primary non-Hodgkin lymphoma of bone Disease
Disease Page Type Author Date Assigned to Author Target Completion Date Author Content (Pending or Complete) Date Completed by Author Associate Editor Date of Last Editor Review Notes
Langerhans cell histiocytosis Disease See HAEM5 volunteer sheet for authorship status N/A N/A N/A N/A N/A N/A
Erdheim-Chester disease Disease See HAEM5 volunteer sheet for authorship status N/A N/A N/A N/A N/A N/A
Rosai-Dorfman disease Disease See HAEM5 volunteer sheet for authorship status N/A N/A N/A N/A N/A N/A

CHAPTER 5 (GENETIC TUMOUR SYNDROMES OF SOFT TISSUE AND BONE)










Enchondromatosis Disease See GTS5 volunteer sheet for authorship status N/A N/A N/A N/A N/A N/A
Li-Fraumeni syndrome Disease See GTS5 volunteer sheet for authorship status N/A N/A N/A N/A N/A N/A
McCune-Albright syndrome Disease See GTS5 volunteer sheet for authorship status N/A N/A N/A N/A N/A N/A
Multiple osteochondromas Disease See GTS5 volunteer sheet for authorship status N/A N/A N/A N/A N/A N/A
Neurofibromatosis type 1 Disease See GTS5 volunteer sheet for authorship status N/A N/A N/A N/A N/A N/A
Rothmund-Thomson syndrome Disease See GTS5 volunteer sheet for authorship status N/A N/A N/A N/A N/A N/A
Werner syndrome Disease See GTS5 volunteer sheet for authorship status N/A N/A N/A N/A N/A N/A