Explanipedia

Perineurial Malignant Peripheral Nerve Sheath Tumor of the Cauda Equina: Diagnostic Challenge Open

Tomonori Kawasaki, Tomoaki Torigoe, Toshiro Watanabe, Satoshi Kanno, Masataka Hirasaki , et al. · 2025

Malignant peripheral nerve sheath tumors (MPNSTs) are rare sarcomas with an extremely rare perineurial subtype. Herein, we present a case of a perineurial MPNST in the cauda equina. Clinically and radiologically, a mass extending from with…

Characteristic magnetic resonance imaging features of atypical spindle cell/pleomorphic lipomatous tumor Open

Kojiro Onohara, Jiro Ichikawa, Hiroaki Watanabe, Keiko Hayakawa, Tomonori Kawasaki , et al. · 2025

Atypical spindle cell/pleomorphic lipomatous tumor (ASPLT) is a newly classified benign lipomatous neoplasm characterized by diverse histological features, leading to broad differential diagnoses. This study evaluated the magnetic resonanc…

Meflin is a druggable target using antibody-drug conjugates in progressive osteosarcoma Open

Nobutoshi Esaki, Tomomi Sakoda, Ryota Ando, Yuki Miyai, Tadashi Iida , et al. · 2025

Limb muscle mass and phase angle asymmetry in 8-year-old children Open

Masanori Wako, Taro Fujimaki, Jiro Ichikawa, Ryoji Shinohara, Sanae Otawa , et al. · 2025

The diagnostic challenge of melanoma with myxoid change mimicking metastatic soft tissue sarcoma Open

Jiro Ichikawa, Youichi Ogawa, Tomonori Kawasaki, Y. Fukushima, Masanori Wako , et al. · 2025

Metastatic subcutaneous Ewing sarcoma mimicking a synchronous second primary neoplasm: a case description Open

Jiro Ichikawa, Koshi Akahane, Minori Tamai, Kojiro Onohara, Masaki Matsuda , et al. · 2025

Irreducible pulled elbow followed with supervised neglect and ultrasonography: Two case reports Open

Masanori Wako, Tetsuhiro Hagino, Tetsuo Hagino, Jiro Ichikawa, Hirotaka Haro · 2025

Proximal Epithelioid Sarcoma Mimicking Inguinal Inflammation Open

Tomonori Kawasaki, Toshiro Watanabe, Satoshi Kanno, Tomoaki Torigoe, Kojiro Onohara , et al. · 2025

Epithelioid sarcoma (ES) is an extremely rare sarcoma categorized into classic and proximal types. Proximal ES is characterized by its occurrence in older individuals, proximal locations, deep tissue involvement, and a tendency to be large…

Pediatric Osteosarcoma: The Clot Traps the Cancer Open

Stephen Chenard, Heather Cole, Tetsuro Ohba, Jiro Ichikawa, Masanori Saito , et al. · 2025

PDK1-dependent metabolic reprogramming regulates stemness and tumorigenicity of osteosarcoma stem cells through ATF3 Open

Kazuya Tokumura, Kazuya Fukasawa, Jiro Ichikawa, Koki Sadamori, Manami Hiraiwa , et al. · 2025

Gastric perineurial malignant peripheral nerve sheath tumor masquerading as lymph node metastasis of esophageal carcinoma Open

Tomonori Kawasaki, Hiroshi Sato, Tomoaki Tashima, Jiro Ichikawa · 2025

Recent topics of differential diagnosis in dermatofibrosarcoma protuberans Open

Jiro Ichikawa, Tomonori Kawasaki, Kojiro Onohara, Masanori Wako · 2025

Extraskeletal Larynx Osteosarcoma: Difficult Diagnosis and Early Resection Open

Tomonori Kawasaki, Mitsuhiko Nakahira, Kojiro Onohara, Tomoko Yamazaki, Tomoaki Tashima , et al. · 2025

Imaging and histopathological considerations in determining the primary site and differential diagnosis of gallbladder liposarcoma Open

Jiro Ichikawa, Shinji Furuya, Tomonori Kawasaki, Kojiro Onohara, Masanori Wako , et al. · 2025

Diagnostic challenge in retroperitoneal tumor by imaging Open

Jiro Ichikawa, Kojiro Onohara, Masanori Wako, Hirotaka Haro · 2025

Intravascular Myopericytoma of the Foot: A Diagnostic Challenge Open

Taro Fujimaki, Tomonori Kawasaki, Masanori Wako, Kojiro Onohara, Jiro Ichikawa · 2025

Intraosseous Pneumatocysts of the Scapula Mimicking Bone Tumors: A Report of Two Rare Cases Along with Elucidation of Their Etiology Open

Jiro Ichikawa, Masanori Wako, Tomonori Kawasaki, Satoshi Ochiai, Tetsuo Hagino , et al. · 2025

Background/Objectives: Pneumatocysts, characterized by gas-filled cavities, are commonly found in the spine and pelvis but are rarely observed in the scapula. In this report, we describe two rare cases of scapular pneumatocysts mimicking b…

Muscle Infiltration in Chronic Lymphocytic Leukemia: A Diagnostic Challenge Open

Jiro Ichikawa, Keita Kirito, Tomonori Kawasaki, Kojiro Onohara, Masanori Wako , et al. · 2025

Chronic lymphocytic leukemia (CLL) is the most common leukemia in adults but is rare in Asia. Extramedullary and extranodal manifestations in CLL are generally uncommon, and muscle involvement is extremely rare. A 70-year-old male with CLL…

Importance of Appropriate and Substantial Imaging and Pathological Information for Rare Conditions Open

Jiro Ichikawa, Tomonori Kawasaki, Kojiro Onohara · 2025

We read with interest the paper by Indra et al titled “Pigmented Villonodular Synovitis (PVNS) of the Knee mimicking Septic Arthritis in a Paediatric Patient: A Case Report”. We would like to thank the authors for publishing this interesti…

Imaging, clinical, and histopathological challenges in diagnosing retroperitoneal extraskeletal osteosarcoma Open

Jiro Ichikawa, Tomonori Kawasaki, Kojiro Onohara, Masanori Wako, Naofumi Taniguchi , et al. · 2025

Comparison of Locations and Frequencies of Referred Pain in Pediatric Hip Disorders: A Retrospective Study Open

Tetsuhiro Hagino, Masanori Wako, Tetsuo Hagino, Jiro Ichikawa, Taro Fujimaki , et al. · 2025

Effects of outdoor play on body composition and physical performance in children: the Yamanashi Adjunct study of the Japan Environment and Children’s Study Open

Masanori Wako, Taro Fujimaki, Jiro Ichikawa, Kensuke Koyama, Ryoji Shinohara , et al. · 2025

Introduction Childhood is a pivotal developmental stage that substantially affects lifelong habits. Recent research has emphasized the vital role of outdoor play in children’s mental and physical well-being. Despite the World Health Organi…

Significance of differential diagnosis for the elucidation of rare and complicated diseases Open

Jiro Ichikawa, Tomonori Kawasaki, Kojiro Onohara, Masanori Wako, Satoshi Ochiai , et al. · 2025

Adequate Diagnostic and Therapeutic Management Practices in Dermatofibrosarcoma Protuberans Open

Jiro Ichikawa, Tomonori Kawasaki, Masanori Wako, Satoshi Ochiai, Tetsuo Hagino , et al. · 2025

Diagnostic Challenge of Localized Tenosynovial Giant Cell Tumor in Children Open

Jiro Ichikawa, Satoshi Ochiai, Tomonori Kawasaki, Kojiro Onohara, Masanori Wako , et al. · 2025

This report describes a rare case of a pediatric tenosynovial giant cell tumor (TSGCT) with a delayed diagnosis. A 9-year-old boy presented with a 3-month history of knee pain and swelling, initially attributed to a femoral non-ossifying f…

Assessment of Fall Risk and Adverse Events Among General Ward Inpatients at a Regional General Hospital in Japan Open

Tetsuo Hagino, Tetsuhiro Hagino, Masanori Wako, Satoshi Ochiai, Naofumi Taniguchi , et al. · 2025

This study identified the risk factors for falls and for adverse events in inpatients and demonstrated the need to pay special attention to patients who require assistance with mobility or excretion. These results suggest the importance of…

Preoperative Spinal Sagittal Alignment Affects Improvement of Locomotive Syndrome by Four Years After Total Hip Arthroplasty Open

Naofumi Taniguchi, Tetsuro Ohba, Tetsuya Jinno, Jiro Ichikawa, Satoshi Ochiai , et al. · 2025

Introduction Most patients with hip osteoarthritis requiring total hip arthroplasty suffer from locomotive syndrome stage 3, which indicates difficulty with mobility and social participation. Although total hip arthroplasty improves their …

Recent advances in immunohistochemical and molecular profiling for differential diagnosis between giant cell-rich lesions and tenosynovial giant cell tumors Open

Jiro Ichikawa, Tomonori Kawasaki, Satoshi Ochiai, Masanori Wako, Tetsuo Hagino , et al. · 2025

Indolent Angiomatoid Fibrous Histiocytoma Mimicking a Benign Cystic Tumor Open

Jiro Ichikawa, Tomonori Kawasaki, Kojiro Onohara, Masanori Wako, Satoshi Ochiai , et al. · 2025

Angiomatoid fibrous histiocytoma (AFH) is a rare intermediate tumor that is often difficult to diagnose radiologically and pathologically. Herein, we report a case of AFH in the knee that was initially misdiagnosed as a cystic lesion. The …

The Degree of Flatfoot in Children is Not Related to Physical Performance But Significantly Related to Postural Stability: The Yamanashi Adjunct Study of the Japan Environment and Children's Study Open

Masanori Wako, Taro Fujimaki, Jiro Ichikawa, Ryoji Shinohara, Sanae Otawa , et al. · 2025

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