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Schwannomas are benign tumors derived from the sheath of Schwann cells. Though it is common to see schwannomas in the head and neck region, auricular schwannomas are rare and only few cases have been reported. There are no distinguishing clinical findings or images; therefore, the histopathological diagnosis is mandatory. We describe a case of auricular schwannoma with clinical pictures and discuss the differential diagnoses according to histopathologic findings., Competing Interests: Declaration of conflicting interestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Competing Interests: Competing interests: None declared.

Auricular chondritis of unknown cause was suspected in a 10-year-old male Bolognese dog with a five-month history of painful bilateral nodular and ulcerative pyogranulomatous dermatitis of the pinnae with putative auricular cartilage destruction. Pain and lesions resolved with immunosuppressive doses of prednisolone, yet the condition resulted in deformity of both pinnae and external canals., (© 2024 ESVD and ACVD.)

Competing Interests: Disclosure The authors report no conflicts of interest in this work.

Background: Suppurative perichondritis of the auricle is a common disease that can easily cause malformations if it develops into an uncontrolled infection. In nearly half of the cases, otolaryngologists cannot identify the pathogens involved., Case Presentation: In the present work, we described two cases of pyogenic perichondritis, with negative on conventional culture. However, using metagenomic next-generation sequencing (mNGS), we detected fungal infections in the patients and after the patients were given anti-fungal treatment, the patients achieved a good prognosis., Conclusions: These cases highlighted the possibility that fungi might be the involved pathogens in patients who have had multiple negative bacterial cultures, and mNGS should be applied in these cases. mNGS could be used as a supplement to traditional culture methods., (© 2024. The Author(s).)

Competing Interests: Die Autorinnen/Autoren geben an, dass kein Interessenkonflikt besteht.

Competing Interests: Competing interests: None declared.

The details of how macrophages control different healing trajectories (regeneration vs. scar formation) remain poorly defined. Spiny mice (Acomys spp.) can regenerate external ear pinnae tissue, whereas lab mice (Mus musculus) form scar tissue in response to an identical injury. Here, we used this dual species system to dissect macrophage phenotypes between healing modes. We identified secreted factors from activated Acomys macrophages that induce a pro-regenerative phenotype in fibroblasts from both species. Transcriptional profiling of Acomys macrophages and subsequent in vitro tests identified VEGFC, PDGFA, and Lactotransferrin (LTF) as potential pro-regenerative modulators. Examining macrophages in vivo, we found that Acomys-resident macrophages secreted VEGFC and LTF, whereas Mus macrophages do not. Lastly, we demonstrate the requirement for VEGFC during regeneration and find that interrupting lymphangiogenesis delays blastema and new tissue formation. Together, our results demonstrate that cell-autonomous mechanisms govern how macrophages react to the same stimuli to differentially produce factors that facilitate regeneration., Competing Interests: Declaration of interests At the time of publication, D.T. is employed by Glakosmithkline (GSK)., (Copyright © 2024 Elsevier Inc. All rights reserved.)

Cutaneous leishmaniasis can occur on any exposed area of the body; however, the pinna is an exceptionally rare site for the disease. Caused by the parasite Leishmania , cutaneous leishmaniasis has a wide range of presentations and thus is very easy to misdiagnose or mistake for a neoplastic lesion. Here, we report the case of a middle-aged male patient presenting with a painful, ulcerated lesion on the left auricle initially suspected to be a malignancy with histopathology eventually revealing a diagnosis of auricular leishmaniasis. The patient received appropriate therapy and was found to be disease free at follow-up. These isolated lesions of the pinna often resemble neoplastic lesions and thus may escape diagnosis for months at a time, increasing patient stress as well as expenditure. In addition, prompt recognition may also help mitigate recurrence of the disease, making it worthwhile to include cutaneous leishmaniasis as part of the differential, especially in endemic areas., Competing Interests: Competing interests: None declared., (© BMJ Publishing Group Limited 2023. No commercial re-use. See rights and permissions. Published by BMJ.)

Nodular fasciitis (NF) has a low incidence, many classification subtypes and large histological variations. We describe a 17-month-old child who presented with a mass in the right cavity of auricular concha that was successfully cured by 2 procedures. In pediatric patients with fibroproliferative lesions, the possibility of NF should be excluded to avoid misdiagnosis and overtreatment.

Abstract: Auricular defects are demanding to reconstruct due to the complex anatomy and the three-dimensional shape of the ear. The functional perspective needs to be addressed without neglecting aesthetic outcomes though, given that it is a prominent facial landmark. In this report the reconstruction of a sizable soft tissue defect of the helical crus and upper third of the right auricle, following surgical excision of a skin tumor, is presented. A variety of treatment options is explored, and a relevant algorithm is proposed. This defect was reconstructed using a transposition flap from the postauricular area, accomplishing single-stage full defect coverage combined with optimal postoperative aesthetic results. High patient satisfaction levels were achieved, avoiding more complicated and prolonged procedures. This case exemplifies the proposed algorithmic approach of upper-third auricular defects, addressing these defects in a systematic and logical manner., Competing Interests: The authors report no conflicts of interest., (Copyright © 2021 by Mutaz B. Habal, MD.)

This study aimed to investigate the factors associated with congenital auricular deformities and evaluate the long-term frequency of their self-correction. Ninety newborns were enrolled in the study, and data were collected within 2 weeks after birth and at 1 year. The shape of the auricle was classified into seven categories using a digital image. At 2 weeks after birth, several birth-related factors were evaluated in the auricular deformity and normal groups. At 1 year after birth, the images of auricles were compared with the images at birth, and the changes in the auricle shape were investigated. Congenital auricular deformities were observed in 139 out of 180 ears, and the major type noted was helix rim deformity (47 ears), followed by normal ears (41 ears), and cup ears (33 ears). Male sex was found to have a statistically significant association with the occurrence of auricular deformity. In the longitudinal study, among 43 neonates (86 ears) followed-up 12 months later, the self-correction rate was approximately 50%. The normal auricle and prominent ear increased, helix rim deformity and cup ear decreased significantly. The prognosis of deformity varied depending on the type of deformity. Considering the low self-correction rate in the prominent and cup ears, newborns with these deformities might be recommended to undergo management such as auricle molding technique, as required., (Copyright © 2021 British Association of Plastic, Reconstructive and Aesthetic Surgeons. Published by Elsevier Ltd. All rights reserved.)

Competing Interests: The author has no funding or conflicts of interest to declare.

Abstract: The association between earlobe crease(s) and coronary artery atherosclerosis has stimulated debate and controversy over the years. Most available published studies have been conducted on living patients. Although these studies offer valuable insight into such associations in patients who exhibit symptoms, no information is available from these studies on the prevalence of earlobe creases among an asymptomatic population. Postmortem studies offer the advantage of including individuals free of symptomatic cardiovascular disease, thus providing an inbuilt control group. The atherosclerotic pathological findings of 1298 individuals who underwent coronial postmortem examination at Wellington Regional Hospital, New Zealand, between 2006 and 2013 were retrospectively studied. Earlobe creases and atherosclerosis involving the coronary arteries were semiquantitatively appraised. The presence of an earlobe crease was found to be significantly associated with coronary artery atherosclerosis., Competing Interests: The authors report no conflict of interest., (Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.)

Objectives/hypothesis: To analyze the use of highly translatable three-dimensional (3D)-printed auricular scaffolds with and without novel cartilage tissue inserts in a rodent model., Study Design: Preclinical rodent animal model., Methods: This prospective study assessed a single-stage 3D-printed auricular bioscaffold with or without porcine cartilage tissue inserts in an athymic rodent model. Digital Imaging and Communications in Medicine computed tomography images of a human auricle were segmented to create an external anatomic envelope filled with orthogonally interconnected spherical pores. Scaffolds with and without tissue inset sites were 3D printed by laser sintering bioresorbable polycaprolactone, then implanted subcutaneously in five rats for each group., Results: Ten athymic rats were studied to a goal of 24 weeks postoperatively. Precise anatomic similarity and scaffold integrity were maintained in both scaffold conditions throughout experimentation with grossly visible tissue ingrowth and angiogenesis upon explantation. Cartilage-seeded scaffolds had relatively lower rates of nonsurgical site complications compared to unseeded scaffolds with relatively increased surgical site ulceration, though neither met statistical significance. Histology revealed robust soft tissue infiltration and vascularization in both seeded and unseeded scaffolds, and demonstrated impressive maintenance of viable cartilage in cartilage-seeded scaffolds. Radiology confirmed soft tissue infiltration in all scaffolds, and biomechanical modeling suggested amelioration of stress in scaffolds implanted with cartilage., Conclusions: A hybrid approach incorporating cartilage insets into 3D-printed bioscaffolds suggests enhanced clinical and histological outcomes. These data demonstrate the potential to integrate point-of-care tissue engineering techniques into 3D printing to generate alternatives to current reconstructive surgery techniques and avoid the demands of traditional tissue engineering., Level of Evidence: NA Laryngoscope, 131:1008-1015, 2021., (© 2020 American Laryngological, Rhinological and Otological Society Inc, "The Triological Society" and American Laryngological Association (ALA).)

Objectives: The post-traumatic ear deformity, known today as cauliflower ear, has been described since antiquity. It has long been associated with pugilistic sports (wrestling, boxing) as well as among the mentally ill. The aim of this study is to present the various terms used since antiquity to describe these traumatic deformations of the auricle and to trace the origin of the modern moniker "cauliflower ear.", Methods: Historical study, only based on original documentation accessed through personal libraries and universities repositories, completed with online sources and etymological dictionaries., Results: We were able to identify no fewer than 39 names for the deformity. The term cauliflower ear is of relatively recent origin. It was coined in the first decade of the 20th century, initially in the popular press and subsequently adopted by the medical profession., Conclusion: Ironically, the deformity has only superficial resemblance to a cauliflower. The vegetable, which is part of the cabbage family, has a symmetrical and highly ordered fractal geometry with well-circumscribed excrescences. Cauliflower ear, by contrast, notably lacks symmetry and its rounded protuberances flow into one another. Although somewhat a misnomer, the term is deeply rooted in both popular and medical culture., Level of Evidence: N/A Laryngoscope, 131:E1315-E1321, 2021., (© 2020 American Laryngological, Rhinological and Otological Society Inc, "The Triological Society" and American Laryngological Association (ALA).)

Both juvenile temporal arteritis (JTA) and Kimura's disease are eosinophilic inflammatory conditions but exhibit different clinical manifestations. Here, we describe a case involving a 40-year-old man who developed JTA secondary to Kimura's disease. Approximately 3 years before admission, masses appeared on both posterior auricles. A biopsy of the right posterior auricle mass led to a diagnosis of Kimura's disease. Approximately 4 months before admission, both masses increased in size, and almost simultaneously, the left temporal artery became distended. Histopathology of a biopsy of the left temporal artery revealed inflammatory findings with marked eosinophil infiltration and significant intimal hyperplasia with stenosis of the vascular lumen, indicating JTA. An analysis of the 48 reported cases of JTA, identified in a literature review, and the present case, revealed that Kimura's disease was detected in 6 cases, all of which involved Asians. In conclusion, this case and the literature review suggest that JTA can be accompanied by another eosinophilic inflammation-based disorder, Kimura's disease, particularly in Asians. This newly highlighted relationship between JTA and Kimura's disease could lead to a better understanding of JTA, which is an extremely rare disease.

Owing to its ability to form biofilms, Staphylococcus aureus is responsible for an increasing number of infections on implantable medical devices. The aim of this study was to develop a mouse model using microbeads coated with S. aureus biofilm to simulate such infections and to analyse the dynamics of anti-biofilm inflammatory responses by intravital imaging. Scanning electron microscopy and flow cytometry were used in vitro to study the ability of an mCherry fluorescent strain of S. aureus to coat silica microbeads. Biofilm-coated microbeads were then inoculated intradermally into the ear tissue of LysM-EGFP transgenic mice (EGFP fluorescent immune cells). General and specific real-time inflammatory responses were studied in ear tissue by confocal microscopy at early (4-6h) and late time points (after 24h) after injection. The displacement properties of immune cells were analysed. The responses were compared with those obtained in control mice injected with only microbeads. In vitro, our protocol was capable of generating reproducible inocula of biofilm-coated microbeads verified by labelling matrix components, observing biofilm ultrastructure and confirmed in vivo and in situ with a matrix specific fluorescent probe. In vivo, a major inflammatory response was observed in the mouse ear pinna at both time points. Real-time observations of cell recruitment at injection sites showed that immune cells had difficulty in accessing biofilm bacteria and highlighted areas of direct interaction. The average speed of cells was lower in infected mice compared to control mice and in tissue areas where direct contact between immune cells and bacteria was observed, the average cell velocity and linearity were decreased in comparison to cells in areas where no bacteria were visible. This model provides an innovative way to analyse specific immune responses against biofilm infections on medical devices. It paves the way for live evaluation of the effectiveness of immunomodulatory therapies combined with antibiotics., Competing Interests: The authors have declared that no competing interests exist.

Dermoid cyst is a rare benign tumor and about 7% of occurrences are found in the head and neck region. Its location is almost always in the midline of the body such as the orbit, oral cavity, and nose, but it is rarer in and around the auricle. The authors present a 31-year-old woman with dermoid cyst in the postauricular area which is a rare site for this lesion. In surgery under local anesthesia, the mass was limited to the subcutaneous area and excised completely. Surgical excision should be considered for cosmetic reasons and the mass should be excised completely to prevent recurrence and infection. Histopathologic confirmation is important and mandatory after excision to confirm the pathologic diagnosis and rule out the possibility of malignancy.

The most common malignant tumor in humans is skin cancers. Skin cancers are most commonly seen in the head and neck region due to direct exposure to sunlight. Most frequently seen skin cancer in the auricula are basal cell carcinoma (BCC) and squamous cell carcinoma (SCC). The aim of this study is to evaluate the results of postauricular island flap after resection of tumors in the auricula.Twelve patients aged 58 to 84 years were included in the study. Eight patients had BCC, 3 had SCC, and 1 had basosquamous carcinoma (BSC). The tumor was located at the cavum concha in 7 cases, antihelix in 3 cases, triangular fossa in 1 case and scapha in 1 case. Surgical procedure was performed under local anesthesia in 7 patients and under general anesthesia in 5 patients. Postauricular island flap was used in all cases. There were no early complications. Three patients had non-apparent narrowing of the auriculomastoid angle. The patients were followed for an average of 2.6 years between 1 and 9 years. Only one patient with basosquamous carcinoma of the cavum concha had recurrence at 19 months.We believe that the postauricular island flap may be a good alternative for the reconstruction of the defect after resection of tumors in the auricle due to its proximity to the surgical site, color matching, adequate thickness, good vascularization, aesthetic acceptance by the patient and completion of the procedure in one session.

Background: Aural plaques are associated with and thought to be caused by one or more Equus caballus papillomaviruses (EcPV). Aural plaques have not previously been reported to be associated with squamous cell carcinoma (SCC)., Hypothesis/objectives: To describe a horse with aural plaques and squamous cell carcinoma (SCC) on the right pinna., Animals: A 28-year-old thoroughbred gelding presented for multiple plaques and a mass on the right pinna., Methods and Materials: Pinnal resection, histopathological investigation, multiple conventional PCRs for papillomavirus DNA and Sanger sequencing were performed., Results: Multiple, raised, pale tan, fronded plaques covered 60% of the concave surface of the right pinna. Focally these plaques coalesced into an exophytic ulcerated mass near the base of the pinna. Multiple aural plaques and a SCC were diagnosed histopathologically. EcPV4 was detected via PCR in a sample of the SCC., Conclusions and Clinical Importance: This report demonstrates the possibility of malignant transformation from aural plaques to SCC on the pinna of a horse. To the best of the authors' knowledge, this is the first report of EcPV4 associated with SCC., (© 2020 the European Society of Veterinary Dermatology and the American College of Veterinary Dermatology.)

Background: An approach to the reconstruction of the ear requires consideration of gross anatomy, blood supply, and size of the defect to select the repair. While skin grafts provide a convenient option for many helical and conchal defects, using posterior auricular reservoir can preserve ear contour and hide the scar for an aesthetic closure., Purpose: To illustrate the versatility of the post-auricular and mastoid skin reservoir for auricular repairs after surgical removal of a cutaneous malignancy., Data Sources: MEDLINE, EMBASE, and Cochrane Databases were searched for all techniques using a post-auricular approach for auricular repair of surgical defects in the context of cutaneous oncology until November 2019., Data Synthesis: The most well-described techniques of pull-through, post-auricular pedicle and Banner flaps were selected for in-depth review. Illustrative cases and a summary of the spectrum of techniques from case reports are provided., Limitations: Few randomized trials exist to compare the outcomes of the flaps to determine a preferred flap technique., Conclusions: A post-auricular approach for repair of auricular defects can provide a reasonable option for single and multi-staged closure to create an excellent aesthetic outcome while hiding the donor site. More prospective data is required to determine the overall best approach. J Drugs Dermatol. 2020;19(9):883-888. doi:10.36849/JDD.2020.5106.

Angiolymphoid hyperplasia with eosinophilia (ALHE) is a rare, benign vascular tumor. Although its etiology is not clearly known, infection, hormonal factors, and trauma are the suspected reasons. There are few cases considered to be related to pregnancy described in the literature. Granulomas are rarely seen in the histopathology and only four patients with granulomas have been described. Herein, we will present a 28-year-old woman who has been pregnant three times; in every pregnancy, she developed pink nodular lesions on the back of her ear. In the first two pregnancies, the lesions had appeared during the pregnancy and regressed completely in the postpartum period. In her third pregnancy, the condition emerged again and lasted 1.5 years after birth of her child. Histopathology exhibited ALHE with granulomas. Although the relationship between ALHE and pregnancy is already known, there are few cutaneous ALHE cases associated with pregnancy reported in the literature. This association is further supported by this case having recurrent ALHE during each pregnancy period. Also, the presence of naked granuloma in histopathology, unlike most of the cases, contributes to the current histopathological data.

Objectives: Some patients complain of apparent auricle protrusion after chronic otitis media (COM) surgery with the postauricular approach. This study investigates whether auricular protrusion could be restored to the preoperative state after COM surgery; if so, the time needed after surgery and whether the degree of auricular of protrusion differed according to the surgical procedure., Materials and Methods: Forty-seven patients who underwent tympanoplasty and canal wall up and canal wall down mastoidectomy between July 2016 and July 2017 were prospectively studied. To examine the degree of auricular protrusion, the longest distance from the head to the helical rim and the distance from the mastoid process to the helical rim in the plane along the level of the upper margin of the tragus were measured 1 day before surgery and 1 day; 2 weeks; and 1, 2, 4, and 6 months, postoperatively., Results: The superior aspect of the auricle returned to the preoperative state within 2 months of surgery, irrespective of the surgical procedure. The middle aspect was restored to the preoperative state within 4 months of tympanoplasty or canal wall up mastoidectomy, and within 2 months of canal wall down mastoidectomy., Conclusion: Postoperative auricular protrusion is a transient phenomenon.

Competing Interests: Competing interests: None declared.

Neurofibromatosis type 2 (NF2) is a rare genetic disease involving multiple tumors of the central and peripheral nervous systems. Most patients with NF2 have bilateral vestibular schwannomas; nonvestibular schwannomas may also develop. While the majority of patients may present with hearing impairment, tinnitus, dizziness and balance disorders, some may present with cutaneous manifestations. We describe the case of a 20-year-old man who initially presented with a solitary subcutaneous painless nodule in the left preauricular area without any other symptoms. He received excisional biopsy for the preauricular mass and the pathologic diagnosis was schwannoma. Magnetic resonance imaging of brain and neck revealed multiple mass lesions over the bilateral cerebellopontine angle cisterns, extending to the bilateral internal auditory canals, bilateral cervical neuroforamens, cervical and upper thoracic spinal canals, and left posterior neck. The patient was diagnosed with NF2 according to the clinical criteria. He underwent gamma knife stereotactic radiosurgery for bilateral vestibular schwannomas and is now under regular monitoring. CONCLUSION: NF2 patients may present with an isolated solitary cutaneous schwannoma with no other associated clinical findings. Further assessment is thus warranted in young patients presenting with a peripheral schwannoma despite absence of other clinical findings.

Microtia and anotia are hereditary traits characterized by an underdevelopment or complete absence of the outer ear. These congenital malformations observed in many species can exist as part of various syndromes or as an isolated trait as seen in the fat-tailed Awassi sheep breed. Our study aims to identify the genetic mutations causing microtia in Awassi sheep by DNA sequencing. DNA was extracted from blood samples randomly collected from 84 Awassi sheep (16 earless, 41 short ear and 27 normal ear) across different farms. GATA6 exons 1, 2, 4, 6 and 7, CLRN1 intron 3, DCC intron 2, ECR near HMX1 and the intergenic region between GATA6 and MIB1 genes were screened, amplified and sequenced. Allele and genotype frequencies were calculated by direct counting. Association was performed using chi-squared test for goodness-of-fit. Results showed mutations in only two genes significantly associated with microtia in Awassi: duplication in part of ECR near HMX1 (6:114293121-6:114293196) and a SNP at GATA6 exon 7 (23:34498242). Association results revealed that the ECR locus accounts for the microtia phenotype, while GATA6 exon 7 acts as a modifier gene. Genetic screening for these loci can be used to improve selection against microtia in Awassi sheep.