Pneumocephalus is a rare complication of neuraxial procedures and is usually associated with inadvertent dural puncture or the use of air during epidural space identification. Epiduroscopic epidural neuroplasty (EEN) is performed without air injection and permits direct visualization of the epidural space; therefore, pneumocephalus after this procedure is extremely uncommon. A 71-year-old woman with a history of lumbar spine surgery underwent EEN via a caudal approach without sedation. No dural puncture was identified during the procedure. Approximately 12 hours later, she developed a non-orthostatic headache. Brain computed tomography revealed pneumocephalus in the basal cistern and left lateral ventricle. Her symptoms improved with oxygen therapy but worsened 5 days later despite radiologic resolution of the pneumocephalus. Suspected cerebrospinal fluid (CSF) leakage was treated with an epidural blood patch, which resolved her symptoms. Pneumocephalus may occur after EEN without clinically or endoscopically recognized dural injury and may coexist with CSF leakage; an occult microdural defect cannot be excluded as the underlying mechanism. Prompt imaging should be considered in patients who develop early or atypical postprocedural headache.

Appendiceal mucinous adenocarcinoma is a rare gastrointestinal malignancy that may metastasize to the ovaries and closely mimic advanced primary ovarian cancer, creating diagnostic and therapeutic challenges. A 61-year-old postmenopausal woman presented with postmenopausal bleeding, abdominal distension, abdominal pain, and weight loss. Imaging demonstrated bilateral adnexal masses with omental caking and ascites, suggestive of advanced ovarian malignancy. Cancer antigen 125 was elevated, and carcinoembryonic antigen (CEA) levels were markedly increased. She had a history of acute appendicitis 1 year earlier. Biopsy revealed mucinous adenocarcinoma with signet-ring cells. Endoscopic evaluation was unremarkable. Despite neoadjuvant chemotherapy for presumed ovarian cancer, the disease progressed, necessitating cytoreductive surgery. Histopathological examination demonstrated bilateral mucinous adenocarcinoma with peritoneal spread. Immunohistochemistry showed positivity for cytokeratin 20, caudal-type homeobox 2, and special AT-rich sequence-binding protein 2 and negativity for cytokeratin 7 and paired-box gene 8, supporting an appendiceal origin. She was started on fluorouracil, leucovorin, and oxaliplatin chemotherapy. Metastatic appendiceal carcinoma can closely resemble primary ovarian malignancy. Bilateral mucinous ovarian tumors with elevated CEA levels and poor chemotherapy response should prompt evaluation for a gastrointestinal primary tumor.

Primary leiomyosarcoma of the breast is an extremely rare malignancy, accounting for less than 1% of all breast tumors. Diagnosis is challenging because its morphology overlaps with that of other spindle cell lesions, and standardized treatment guidelines are currently unavailable. A 44-year-old woman presented with a rapidly enlarging, firm, 15×15 cm mass in the left breast. She had previously undergone surgery elsewhere, with diagnoses of leiomyoma and desmoid-type fibromatosis. Imaging demonstrated a lobulated mass without evidence of metastasis. Excision revealed pleomorphic spindle cells arranged in intersecting fascicles, with necrosis and dermal invasion. Primary breast leiomyosarcoma was confirmed by immunohistochemistry, which demonstrated smooth muscle actin and desmin positivity and negative staining for pancytokeratin, p63, S100, CD34, and BCL2. The patient underwent modified radical mastectomy followed by adjuvant radiotherapy and chemotherapy. Primary breast leiomyosarcoma is a rare entity that remains diagnostically challenging. Immunohistochemistry is essential for accurate diagnosis, and optimal management requires a dedicated multidisciplinary approach.

We present a rare case of a 68-year-old woman who experienced dizziness, nausea, vomiting, and imbalance for 2 months. Imaging studies, including magnetic resonance imaging, magnetic resonance angiography, and digital subtraction angiography, revealed an intrasellar course of the persistent trigeminal artery (PTA) with atherosclerotic changes. Additionally, hypoplasia of the basilar artery and left vertebral artery was observed. The anatomically rare intrasellar PTA, combined with atherosclerosis and vertebrobasilar hypoplasia, likely contributed to compromised posterior circulation and the patient’s symptoms. This case highlights the importance of considering vascular anomalies and the associated pathological changes in patients with otherwise unexplained posterior circulation symptoms.

Elastofibroma dorsi is a rare, benign soft tissue tumor that typically arises in the infrascapular region. Although it is often asymptomatic, some patients experience pain or a snapping sensation during shoulder movement, which warrants surgical excision. We report a symptomatic case in a middle-aged male patient, highlighting the diagnostic imaging features and surgical management of this condition.

Itching is a representative manifestation of urticaria. However, under certain conditions, urticaria may be characterized by nociceptive sensations, such as stinging or tingling, either instead of or in addition to itching. Three patients with chronic urticaria (CU) who experienced nociceptive pain accompanied by itching were identified and treated with immunoglobulin/histamine complex (IHC) therapy. Nociceptive pain resolved along with improvement in CU symptoms after 8 injections of IHC in the first patient and after 4 injections in the second and third patients. Nociceptive pain may present as a symptom of CU. The clinical characteristics of the transition from itching to nociceptive pain, together with the observed outcomes of IHC therapy, appear to support the intensity theory explaining this shift, which may be mediated by histamine. Further clinical and basic immunological studies are warranted to clarify the underlying mechanisms.

Citations

• Histamine-Mediated Syndrome (HMS): Beyond Allergy and Therapeutic Potential of Immunoglobulin/Histamine Complex (IHC)
  Hyuk Soon Kim, Geunwoong Noh
  International Journal of Molecular Sciences.2026; 27(10): 4494.     CrossRef

Methylenetetrahydrofolate reductase (MTHFR) gene mutations, particularly homozygous mutations, have been associated with a higher incidence of venous thrombosis, coronary heart disease, and obstetric complications. We report the case of a 41-year-old man who presented with multiple vascular thrombotic events over a period of 4–5 years, including deep vein thrombosis with pulmonary thromboembolism, cerebral venous thrombosis and posterior circulation stroke. The patient was found to have elevated serum homocysteine levels and subsequently underwent genetic testing for MTHFR mutations after other potential prothrombotic conditions were excluded. This case is notable because compound heterozygous mutations of the MTHFR gene (C677T and A1298C) were identified in association with recurrent vascular thrombotic events. Management focused on long-term anticoagulation and supplementation with vitamin B6, vitamin B12, and folic acid.

A 28-year-old woman developed drug-induced tachycardia in the left lateral decubitus (LLD) position following intravenous administration of glycopyrrolate. The tachycardia was unresponsive to esmolol, labetalol, and fentanyl but resolved unexpectedly after the tidal volume was reduced from 8 to 6 mL/kg. Drug-induced tachycardia or arrhythmia occurring in the LLD position under mechanical ventilation may be attenuated by adopting a low tidal volume ventilation strategy (6 mL/kg).

Citations

• Glycopyrrolate
  
  Reactions Weekly.2026; 2102(1): 94.     CrossRef

Patients with congenital insensitivity to pain and anhidrosis (CIPA) exhibit an inability to perceive pain, recurrent fractures, self-mutilation, and impaired thermoregulation, which lead to severe complications and high morbidity. Children with CIPA often sustain multiple unnoticed fractures that may be mistaken for child abuse because of the presence of fractures at different stages of healing. If unrecognized or inadequately managed, these injuries can cause permanent damage. We report the case of a 9-year-old boy who presented with recurrent fractures, chronic osteomyelitis, heterotrophic ossification, and gangrene. This case underscores the need for heightened awareness among healthcare providers regarding the clinical manifestations and management challenges of CIPA. It also emphasizes the importance of early diagnosis, meticulous follow-up, and a multidisciplinary approach to optimize outcomes and prevent severe complications in affected children.