Yoshiro Otsuki
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View article: Three cases of invasive solid papillary carcinoma of the breast displaying a wide variety of histological patterns with diagnostic challenges
Three cases of invasive solid papillary carcinoma of the breast displaying a wide variety of histological patterns with diagnostic challenges Open
View article: Utilizing a Confronting Upside-Down Approach for IgG4-Related Posterior Mediastinal Fibrosis: A Report of a Rare Case
Utilizing a Confronting Upside-Down Approach for IgG4-Related Posterior Mediastinal Fibrosis: A Report of a Rare Case Open
View article: Locally Advanced Prostate Squamous Cell Carcinoma Diagnosed Using <scp>PET</scp>‐<scp>CT</scp> and Treated With Robot‐Assisted Radical Prostatectomy
Locally Advanced Prostate Squamous Cell Carcinoma Diagnosed Using <span>PET</span>‐<span>CT</span> and Treated With Robot‐Assisted Radical Prostatectomy Open
Introduction Primary squamous cell carcinoma of the prostate accounts for < 1% of prostate cancers. Case Presentation A 70‐year‐old man with no urinary symptoms and a normal prostate‐specific antigen of 0.96 ng/mL was referred for abnormal…
View article: Diagnostic Utility of Podoplanin Immunohistochemistry Combined with the NanoSuit-Correlative Light and Electron Microscopy Method for Thoracic Malignant Tumors
Diagnostic Utility of Podoplanin Immunohistochemistry Combined with the NanoSuit-Correlative Light and Electron Microscopy Method for Thoracic Malignant Tumors Open
Background/Objectives: Differentiating thoracic malignant tumors, such as epithelioid malignant pleural mesothelioma (EMPM) and non-small-cell lung carcinoma (NSCLC), primarily comprising lung adenocarcinoma (LAC) and lung squamous cell ca…
View article: Immunohistochemical and molecular evolutionary features of jejunoileal adenocarcinoma unveiled through comparative analysis with colorectal adenocarcinoma
Immunohistochemical and molecular evolutionary features of jejunoileal adenocarcinoma unveiled through comparative analysis with colorectal adenocarcinoma Open
View article: Cardiac Rupture and Death Following Administration of Recombinant Tissue-Type Plasminogen Activator (rt-PA)
Cardiac Rupture and Death Following Administration of Recombinant Tissue-Type Plasminogen Activator (rt-PA) Open
View article: Exploring the Genetic and Clinical Landscape of Dedifferentiated Endometrioid Carcinoma
Exploring the Genetic and Clinical Landscape of Dedifferentiated Endometrioid Carcinoma Open
Dedifferentiated endometrioid carcinoma (DDEC) is rare, has a poor prognosis, and the genes responsible for dedifferentiation remain unclear. This study aimed to clarify the characteristics of DDEC in Japanese patients and develop treatmen…
View article: Histological Characteristics of the Filum Terminale in Occult Tethered Cord Syndrome and Filum Terminale Lipoma
Histological Characteristics of the Filum Terminale in Occult Tethered Cord Syndrome and Filum Terminale Lipoma Open
The observed decrease in collagen type I and elastic fibers in OTCS suggests compromised filum terminale elasticity, potentially contributing to pathological tethering. In FTL, adipose infiltration is the primary factor driving spinal cord…
View article: Rapidly Progressing Prostate Cancer With Low Prostate-Specific Antigen and Gleason Score 5+5: A Case Report
Rapidly Progressing Prostate Cancer With Low Prostate-Specific Antigen and Gleason Score 5+5: A Case Report Open
View article: Exploring the Genetic and Clinical Landscape of Dedifferentiated Endometrioid Carcinoma
Exploring the Genetic and Clinical Landscape of Dedifferentiated Endometrioid Carcinoma Open
Dedifferentiated endometrioid carcinoma (DDEC) is rare, has a poor prognosis, and the genes responsible for dedifferentiation remain unclear. This study aimed to clarify the characteristics of DDEC in Japanese patients and develop treatmen…
View article: Endoscopic and Clinicopathological Features of a Colorectal Mucin-Rich Variant of Traditional Serrated Adenoma
Endoscopic and Clinicopathological Features of a Colorectal Mucin-Rich Variant of Traditional Serrated Adenoma Open
Introduction: The mucin-rich variant of traditional serrated adenoma (MR-TSA), pathologically defined by the presence of goblet cells comprising over 50% of the lesion compared to the absorptive epithelial eosinophilic cytoplasm, was recen…
View article: Intrathoracic Vagal Schwannoma Mimicking Metastatic Lymphadenopathy with a Positional Shift
Intrathoracic Vagal Schwannoma Mimicking Metastatic Lymphadenopathy with a Positional Shift Open
Schwannomas originating from the thoracic vagus nerve can exhibit pedunculated growth and positional migration, posing diagnostic challenges. Mobile mediastinal nodules should prompt consideration of vagal nerve schwannomas in the differen…
View article: Effective Management of Refractory Paraneoplastic Vasculitis in Myelodysplastic Syndromes With Azacitidine, Prednisolone, and Azathioprine
Effective Management of Refractory Paraneoplastic Vasculitis in Myelodysplastic Syndromes With Azacitidine, Prednisolone, and Azathioprine Open
A 62‐year‐old man presented with left ear pain, sensorineural hearing loss, and high‐grade fever. Peripheral blood tests revealed abnormal blood cells, prompting further investigation that led to a diagnosis of myelodysplastic syndromes (M…
View article: Idiopathic multicentric Castleman disease developing after a diagnosis of sarcoidosis: A case report and literature review
Idiopathic multicentric Castleman disease developing after a diagnosis of sarcoidosis: A case report and literature review Open
A 72-year-old woman presented with an abnormal shadow on chest radiograph. She was histologically diagnosed with sarcoidosis 20 years previously, and prednisolone was initiated 8 years previously. Computed tomography revealed centrilobular…
View article: Confronting Upside-Down Video-Assisted Thoracic Surgery Approach for Hemorrhagic Bronchogenic Cyst Manifested by Sudden Back Pain
Confronting Upside-Down Video-Assisted Thoracic Surgery Approach for Hemorrhagic Bronchogenic Cyst Manifested by Sudden Back Pain Open
Hemorrhagic bronchogenic cysts should be considered in the differential diagnosis of intrathoracic cysts presenting with sudden pain. Upfront surgery is recommended for symptomatic bronchogenic cysts, irrespective of the location or etiolo…
View article: Delayed Hemorrhage Following Needle Aspiration for a Mediastinal Cyst: The Significance of Confronting Upside-Down Video-Assisted Thoracic Surgery Under Two-Lung Ventilation
Delayed Hemorrhage Following Needle Aspiration for a Mediastinal Cyst: The Significance of Confronting Upside-Down Video-Assisted Thoracic Surgery Under Two-Lung Ventilation Open
A delayed intracystic hemorrhage is a potential risk following an EUS-FNA for mediastinal cysts. A confronting upside-down VATS approach provides sufficient maneuverability even for superior mediastinal tumors, despite a limited surgical f…
View article: Differential Expression of MicroRNAs in the Colorectal Serrated Neoplasia Pathway and Adenoma–Carcinoma Sequence
Differential Expression of MicroRNAs in the Colorectal Serrated Neoplasia Pathway and Adenoma–Carcinoma Sequence Open
Background and Aim: Colorectal carcinogenesis involves two distinct pathways, the serrated neoplasia pathway and adenoma (AD)–carcinoma sequence, whose precursors are sessile serrated lesion (SSL) and traditional AD, respectively. MicroRNA…
View article: Re-Evaluation of Histopathological Factors for the Outcome of Salivary Duct Carcinoma Patients: A Multi-Institutional Retrospective Study of 240 Cases in a Japanese Cohort
Re-Evaluation of Histopathological Factors for the Outcome of Salivary Duct Carcinoma Patients: A Multi-Institutional Retrospective Study of 240 Cases in a Japanese Cohort Open
View article: Combined Posterior and Interlobar Approaches Enable S10 Segmentectomy for a Centrally Located Intrapulmonary Schwannoma Diagnosed by Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration: Surgical Strategy and Technical Consideration
Combined Posterior and Interlobar Approaches Enable S10 Segmentectomy for a Centrally Located Intrapulmonary Schwannoma Diagnosed by Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration: Surgical Strategy and Technical Consideration Open
Preoperative histological diagnosis of an intrapulmonary schwannoma by EBUS-TBNA is both feasible and clinically advantageous, enabling a limited anatomical resection. A preoperative strategy that incorporates both the tumor's benign natur…
View article: A case of rapidly progressive prostate cancer with bone and lymph node metastasis after contact laser vaporization for benign prostatic hyperplasia
A case of rapidly progressive prostate cancer with bone and lymph node metastasis after contact laser vaporization for benign prostatic hyperplasia Open
Introduction Prostate cancer is incidentally diagnosed in 6%–11% of benign prostatic hyperplasia surgeries. Case presentation A 79‐year‐old man was diagnosed with benign prostatic hyperplasia. The prostate volume was 54.5 mL, and the prost…
View article: Difficult-to-diagnose concurrent onset of sarcoidosis and Hodgkin lymphoma
Difficult-to-diagnose concurrent onset of sarcoidosis and Hodgkin lymphoma Open
View article: Localized nodular pulmonary amyloidosis mimicking primary lung cancer associated with cystic airspaces: A case report
Localized nodular pulmonary amyloidosis mimicking primary lung cancer associated with cystic airspaces: A case report Open
Localized nodular pulmonary amyloidosis can form pulmonary nodules associated with cystic air spaces, but due to its rarity, it cannot be included in the differential diagnosis without appropriate knowledge. Among the differential diagnose…
View article: Pulmonary sclerosing pneumocytoma mimicking a low-grade primary malignancy: A case report
Pulmonary sclerosing pneumocytoma mimicking a low-grade primary malignancy: A case report Open
View article: A solitary pulmonary nodule in a former glass blower mimicking a primary lung adenocarcinoma
A solitary pulmonary nodule in a former glass blower mimicking a primary lung adenocarcinoma Open
Solitary pulmonary nodules due to inhaled glass fragments may mimic a primary lung adenocarcinoma. A definitive diagnosis requires a histological examination in this rare condition.
View article: Cytologic findings of nodular fasciitis in the parotid region
Cytologic findings of nodular fasciitis in the parotid region Open
View article: A case of adrenal lymphangioma successfully treated with laparoscopic partial adrenalectomy
A case of adrenal lymphangioma successfully treated with laparoscopic partial adrenalectomy Open
Introduction Adrenal lymphangioma is a rare benign tumor of lymphatic origin, usually incidentally detected from various imaging studies taken for an unrelated purpose. We present a case of a right adrenal lymphangioma treated successfully…
View article: A case of prostatic metastasis from non‐seminomatous testicular cancer
A case of prostatic metastasis from non‐seminomatous testicular cancer Open
Introduction Prostatic metastasis from testicular cancer is extremely rare, with only 10 reported cases, all of which were diagnosed as relapse. Herein, we report the case of a patient with concurrent testicular cancer and prostatic metast…
View article: An Adult Case of Idiopathic Pulmonary Hemosiderosis Associated with Pulmonary Fibrosis and Emphysematous Change
An Adult Case of Idiopathic Pulmonary Hemosiderosis Associated with Pulmonary Fibrosis and Emphysematous Change Open
A 48-year-old woman was admitted to our hospital with acute respiratory failure. Chest computed tomography showed ground-glass opacity and patchy emphysematous lesions in both lungs. Corticosteroid therapy was effective; however, the disea…
View article: Promising Therapeutic Impact of Immune Checkpoint Inhibitors in Type II Endometrial Cancer Patients with Deficient Mismatch Repair Status
Promising Therapeutic Impact of Immune Checkpoint Inhibitors in Type II Endometrial Cancer Patients with Deficient Mismatch Repair Status Open
Type II endometrial cancer (EC) is responsible for most endometrial cancer-related deaths due to its aggressive nature, late-stage detection, and high tolerance to standard therapies. Thus, novel treatment strategies for type II EC are imp…
View article: Elective video-assisted thoracic surgery for a ruptured mature mediastinal teratoma: A case report
Elective video-assisted thoracic surgery for a ruptured mature mediastinal teratoma: A case report Open
Elective video-assisted thoracic surgery could be a feasible option even for a ruptured mature mediastinal teratoma in selected patients. Besides its maximum size, a large proportion of the cystic component and the absence of great vessel …