UNASSIGNED: To evaluate the imaging characteristics of the tumor, emphasizing its location, and to determine the frequency of typical and atypical locations of olfactory neuroblastoma (ONB).
UNASSIGNED: We retrospectively reviewed the computed tomography and magnetic resonance imaging findings of patients with pathologically proven ONB between April 2000 and April 2023. Demographic information, chief complaints, tumor location, and tumor extension were extracted.
UNASSIGNED: Of the 58 patients, 50 (86.2%) had the epicenter of the mass at the superior part of the nasal cavity, while eight patients (13.8%) had the epicenter at other atypical locations: seven patients (12.1%) at the middle part of the nasal cavity and one patient (1.7%) within both sphenoid sinuses.
UNASSIGNED: ONB is not always present in the upper part or the roof of the nasal cavity, and a significant number of ONBs are occasionally found in the rest of the nasal cavity and other atypical locations.

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OBJECTIVE: Mucosal melanoma (MM) is a rare, aggressive neoplasm in the head and neck region, primarily affecting the nasal cavity and maxillary sinus. This study investigates the correlation of PRAME IHC staining with clinicopathological factors and survival outcomes in sinonasal MM.
METHODS: The retrospective cohort included patients diagnosed with melanoma from January 2011 to May 2022. Histopathological reassessment confirmed MM subtype (epithelioid or spindle). IHC testing involved S100, MelanA, HMB45, SOX10, PRAME, BRAF V600E, and pan-TRK. Kaplan-Meier and Cox proportional hazards analyses explored survival probabilities and outcomes.
RESULTS: The cohort comprised 30 patients (17 females, 13 males) with a mean age of 65 years (standard deviation 13). The 5-year survival probability was approximately 32%. Cox analysis revealed male sex and PRAME IHC staining in ≥70% of cells as associated with lower survival probability.
CONCLUSIONS: In sinonasal MM, PRAME IHC staining in ≥70% of cells is associated with significantly lower survival probability. Male sex, pN1 stage, and tumor location in the sinus are also predictive of poorer survival outcomes. These findings highlight the potential prognostic significance of PRAME expression and other clinicopathological factors in MM. Further studies are warranted to validate and expand upon these observations.

UNASSIGNED: Cutaneous actinomycosis of popliteal fossa is quite unusual, chronic granulomatous disease caused by a group of anaerobic or microaerophilic Gram positive filamentous bacteria that colonize the mouth, colon, and urogenital tract. Actinomycosis of popliteal fossa is rare clinical condition; therefore, recognition of this entity needs high degree of suspicion as the organism is specific internal habitant; primary involvement of extremities is rare.
UNASSIGNED: This case report presents a rare case of actinomycosis of popliteal fossa (left side) in a 40-year-old male patient. The patient complained of presence of a mass with multiple pus oozing sinuses over popliteal fossa. The X-ray of leg revealed presence of foreign body. Histopathological examination of the biopsy from the lesions confirmed diagnosis of cutaneous actinomycosis.
UNASSIGNED: Cutaneous actinomycosis is a disease with great diagnostic challenge and requires high degree of suspicion for the early diagnosis which avoids unnecessary surgery and decreased morbidity and mortality.

BACKGROUND: Frontal sinus stents have been introduced to reduce frontal sinus re-stenosis after surgery and to improve outcomes.
METHODS: This study was a retrospective analysis of 19 patients who had endoscopic sinus surgery with approach to the frontal sinus and insertion of a soft sinus stent.
RESULTS: The frontal recess was patent in 78.9 per cent and stenosed in 21.1 per cent of patients; no completely closed recesses were observed. Mean follow up was 20.7 months, and time period of stenting was 9.8 months on average; complications were observed in 47.4 per cent of the patients, with post-operative sinonasal infection being the most common.
CONCLUSIONS: In the authors\' experience, indications for frontal sinus stenting include recalcitrant chronic rhinosinusitis after multiple functional endoscopic sinus surgeries (especially in chronic rhinosinusitis with nasal polyps), patients with history of important craniofacial surgery or trauma, and recurrent mucoceles. The stent was overall well tolerated as only minor complications were observed. Close clinical follow up is mandatory.

The respiratory tract is a compartmentalised and heterogenous environment. The nasopharynx and sinuses of the upper airways have distinct properties from the lungs and these differences may shape bacterial adaptation and evolution. Upper airway niches act as early colonisation sites for respiratory bacterial pathogens, including those, such as Pseudomonas aeruginosa, that can go on to establish chronic infection of the lungs in people with cystic fibrosis (CF). Despite the importance of upper airway environments in facilitating early adaptation to host environments, currently available in vitro models for study of respiratory infection in CF focus exclusively on the lungs. Furthermore, animal models, widely used to bridge the gap between in vitro systems and the clinical scenario, do not allow the upper and lower airways to be studied in isolation. We have developed a suite of culture media reproducing key features of the upper and lower airways, for the study of bacterial adaptation and evolution in different respiratory environments. For both upper and lower airway-mimicking media, we have developed formulations that reflect airway conditions in health and those that reflect the altered environment of the CF respiratory tract. Here, we describe the development and validation of these media and their use for study of genetic and phenotypic adaptations in P. aeruginosa during growth under upper or lower airway conditions in health and in CF.

Single-cell technologies have recently allowed the identification of multiple lymphatic endothelial cell (LEC) subsets in subcapsular, paracortical, medullary, and other lymph node (LN) sinus systems in mice and humans. New analyses show that LECs serve key immunological functions in the LN stroma during immune responses. We discuss the roles of different LEC types in guiding leukocyte and cancer cell trafficking to and from the LN parenchyma, in capturing microbes, and in transporting, presenting, and storing lymph-borne antigens in distinct types of lymphatic sinuses. We underscore specific adaptations of human LECs and raise unanswered questions concerning LEC functions in human disease. Despite our limited understanding of human lymphatics - hampering clinical translation in inflammation and metastasis - we support the potential of LN LECs as putative targets for boosting/inhibiting immunoreactivity.

Conventional treatment for eosinophilic chronic rhinosinusitis with nasal polyps (eCRSwNP) is usually limited; consequently, relapses occur frequently, accurate local drug delivery is currently a research area of major interest.
Based on postoperative nasal sinus computed tomography (CT) images, the 3D printing technique was used to design and fabricate a precise track-guided sinus drug delivery device. The control group was treated with glucocorticoids by nasal spray for 1 year according to the conventional method, while the experimental group received topical nasal glucocorticoids using the 3D-printed track-guided precise sinus drug delivery device for 1 year. Scores on the Sino-Nasal Outcome Test (SNOT-22) scale and the Lund-Kennedy nasal endoscopic scale during reexamination at 1 month, 3 months, 6 months, and 1 year after the operation were used as the basis for evaluation.
The follow-up duration was 12 months or more following endoscopic sinus surgery (ESS) with neosinus cavity formation. The two groups showed significant differences in SNOT-22 scores and nasal polyp Lund-Kennedy subscores at 3 months, 6 months, and 1 year (p < 0.001) and no differences in plasma cortisol at 6 months and 1 year (p > 0.05).
Local drug administration using our 3D-printed precise sinus drug delivery device is superior to conventional nasal cavity administration in controlling eCRS recurrence.

Tuberculosis is a global health problem. Extrapulmonary tuberculosis remains to be a challenge in the diagnosis and treatment. Tuberculous otitis media being not so commonly diagnosed due to its varied presentation, early diagnosis and treatment remains to be a challenge. The aim of this study is to present the varied and unusual presentations and the importance of histopathological confirmation and new diagnostic tools like CBNAAT (cartridge based nucleic acid amplification test) which aids in the confirmation and to start anti-tubercular treatment (ATT). Five cases of tuberculous otitis media within a period of two years were included in the study. Among the five cases three cases presented with discharging sinuses, one with mastoid abscess and one with tuberculous otitis media with pulmonary origin. All five cases were confirmed with proper histopathological examination and two cases with CBNAAT (cartridge based nucleic acid amplification test) confirmation. Anti-tubercular treatment (ATT) was started and the patients were disease free. Tuberculous otitis media remains to be a rare complication of chronic suppurative otitis media and it has to be kept in mind while treating chronic suppurative otitis media. Classical presentations of tuberculous otitis media are not seen nowadays and the disease extending to the mastoid is the changing trend as the initial presentation. A proper suspicion with confirmation of the disease remains to be the gold standard for diagnosis and for treatment with anti-tubercular therapy.

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