Acute otitis externa also called as \"Swimmers ear\" is commonly seen in all age groups. It is a very common condition, severely painful, characterised by otalgia, otorrhoea, conductive hearing loss and an oedematous ear canal. There is dearth of evidence based treatment guidelines leading to difference of opinion in its treatment particularly in the usage of systemic antibiotics and local antibiotics. To evaluate the clinical efficacy of oral antibiotics in two different protocols in treatment of acute otitis externa. A total of 80 patients with clinically diagnosed otitis externa were included into the study. Group A treated with systemic antibiotics and Group B without antibiotics based on Senturia grading. Response to the treatment was assessed with otoscopic finding and visual analogue scale. Standard analysis was performed with the statistical p value of less than 0.05 which is considered as significant. Group A treated with oral antibiotics had better improvement of the VAS scores in S2b and S2c grades when compared with Group B. However, there was no significant difference in both groups with S1 and S2a grades with or without antibiotics. Oral antibiotics are effective only in cases with severe odema and higher grades of AOE. In cases with initial or milder to moderate AOE the role of antibiotics is still doubtful and hence use of antibiotics to be considered cautiously in this antibiotic resistance era. A combination of good local treatment and IG wicks can produce almost similar results without antibiotics except in severe odematous AOE cases.
UNASSIGNED: The online version contains supplementary material available at 10.1007/s12070-024-04634-7.

OBJECTIVE: Squamous cell carcinomas (SCC) of the external auditory canal (EAC) may harbor unique genomic alterations that may explain aggressive behavior and differentiate these tumors from cutaneous SCCs of other subsites.
BACKGROUND: EAC SCCs arise in a non-ultraviolet-exposed region of the head and neck, are often locally aggressive and may metastasize to lymph nodes or distant sites. The genomic alterations underlying cutaneous SCC of other sites are well-documented; however, mutational profiles of EAC SCC are less well characterized and may contribute to the unique anatomic site, high rates of recurrence and tumor spread. We performed targeted sequencing of a cohort of primary EAC SCCs to identify recurring and potentially targetable genomic alterations.
METHODS: Genomic DNA was extracted from formalin-fixed paraffin-embedded specimens of 7 EAC SCCs and subjected to targeted DNA sequencing using a 227-gene panel. Somatic alterations and gene copy number alterations were annotated using our validated, in-house bioinformatics pipelines.
RESULTS: In our EAC SCCs, we found recurrent alterations in TP53 and genes of receptor tyrosine kinase (eg, EGFR, FGFR) and PI3K pathways (eg, PIK3CA), similar to cutaneous SCCs of other head and neck sites. We also observed a high frequency of telomerase reverse transcriptase amplification and DNA methyltransferase 1 alterations, both of which are rarely observed in cutaneous SCCs of other sites.
CONCLUSIONS: These data represent the first step toward precise molecular characterization of EAC SCCs that may lead to an enhanced understanding of tumor biology and modernized precision medicine approaches for unique tumors.Level of Evidence: NA.

We investigated the prognostic significance and treatment outcomes of pretreatment inflammatory response markers for locally advanced squamous cell carcinoma (SCC) of the external auditory canal (EAC) and middle ear (ME). Between July 2003 and July 2019, 21 patients with SCC of the EAC (n = 18) or ME (n = 3) who received radiotherapy with or without surgery or systemic therapy (radiotherapy alone [n = 2], radiotherapy + systemic therapy [n = 6], radiotherapy + surgery [n = 7], radiotherapy + surgery + systemic therapy [n = 6]) were retrospectively examined. The median radiation dose was 66.0 (range, 50.4-70.0) Gy, with daily fractions of 1.8-2.0 Gy. The median follow-up period was 25 months (range, 6-137). The two-year overall survival (OS), progression-free survival (PFS), and locoregional control (LC) rates were 61%, 48%, and 55%, respectively. OS, PFS, and LC did not differ significantly according to patient- (age, sex), tumor- (Pittsburgh stage, pretreatment neurological findings), and treatment-related (surgery or systemic therapy, radiation dose, prophylactic neck irradiation) factors. Conversely, there were significant differences in OS, PFS, and LC between patients with high and low pretreatment C-reactive protein-to-albumin ratios (p = 0.002, 0.003, and 0.004, respectively). OS also differed significantly between patients with high and low pretreatment neutrophil-to-lymphocyte ratios (NLR; p = 0.037). Other inflammatory response markers, including platelet-to-lymphocyte ratio (PLR) and albumin-to-globulin ratio (AGR), did not influence OS, PFS, or LC. Our findings suggest that pretreatment C-reactive protein-to-albumin ratio and NLRs have a significant impact on treatment outcomes in patients with locally advanced SCC of the EAC and ME.

A 74-year-old Japanese woman with a 1-year history of right preauricular pain and a 2-month history of bleeding from the right ear was admitted to our department. Tumor was observed in the anterior wall in the right external auditory canal. Bony swelling of the right preauricular area was palpated. Computed tomography revealed an ill-defined, osteogenic tumor around the mandibular condyle with a destructive bony lesion involving the temporal bone. Magnetic resonance imaging revealed a 2.0 × 1.5 × 1.3-cm solid tumor around the mandibular condyle, exhibiting a low-intensity signal on T1-weighted imaging and an isointense central area surrounded by low-signal intensity on T2-weighted imaging. Histological examination of biopsy specimens revealed diffuse-type tenosynovial giant cell tumor (D-TGCT). After the feeding arteries for the tumor were embolized, the patient underwent surgery with combined temporal craniotomy and mandibular condylectomy. The soft and cystic tumor with calcification located in the extradural space was totally resected along with the mandibular condyle. No facial paralysis or recurrence was evident as of 6 months postoperatively. To date, only 23 cases of D-TGCT arising in the temporomandibular joint (TMJ) with ear involvement have been reported since 2011. We report successful resection of a rare case of D-TGCT arising in the TMJ.

This study reviewed the clinical manifestations, pathological findings, and treatment outcomes of adenoid cystic carcinoma (ACC) in the external auditory canal (EAC).
This was a retrospective review of 12 patients with a diagnosis of ACC in the EAC seen in a single institution over a 30-year period. Data on the demographics, clinical presentation, treatment strategy, and outcome, as well as the pathological features of ACC, were reviewed and analyzed.
The male-to-female ratio was 1:3 and the mean patient age was 55.9 years. The most common clinical presentation was otalgia (75%). Ten patients underwent surgical interventions, including radical mastoidectomy in five patients, wide excision in three, and lateral temporal bone resection in two. Adjuvant radiotherapy or concurrent chemoradiotherapy (CCRT) was performed in case of incomplete resection. Two patients underwent non-surgical treatments: radiotherapy in one and CCRT in the other. Microscopic perineural invasion was not associated with otalgia or histological subtype. The mean follow-up period was 84.6 months. Local recurrence occurred in 33% of patients. One-quarter of patients had distant metastasis, and all had lung metastasis. The 5-year overall survival rate for these patients was 82.5%.
EAC ACC should be included in the differential diagnosis when a patient presents with otalgia and a mass in EAC for more than 6 months, particularly if the patient is a middle-aged female. Otalgia might not be associated with perineural invasion or histological subtype. The lung is the most common site of distant metastasis in patients with EAC ACC. Further studies should determine the optimal treatment protocol for this rare malignancy.

Ceruminous adenoma (CA) is a rare, benign tumor of the ceruminous gland found in the cartilaginous part of the external auditory canal (EAC). The tumor is diagnosed on histopathology and shows a characteristic dual population of luminal epithelial cells and basal myoepithelial cells. However, CA can be diagnosed on fine-needle aspiration cytology (FNAC) prior to surgery and the cytopathologist should be well aware of its cytological findings to avoid any misdiagnosis. The tumor shows an excellent prognosis with possible recurrence and malignant transformation. The present case emphasizes the cytological features of CA, which have been scantily described in the literature and highlights the role of cytopathologists in preoperative diagnosis.

Objective To investigate characteristics of congenital aural stenosis (CAS) patients\' external auditory canal (EAC) (position, length, orientation, etc.) and compare them with normal EAC.
METHODS: CT images of normal people and CAS patient were utilized. We obtained coordinates of EAC landmarks. Then the Matlab program could calculate some anatomic parameters about EAC, including distances from central point of tympanic annulus (CA), central point of osseous EAC opening (CO), central point of cartilaginous EAC inside opening (CCi), central point of cartilaginous EAC outside opening (CCo) to the Frankfurt horizontal plane (Pfrkt), the median sagittal plane (Psag), the coronal plane (Pcor); orientations of EAC bendings; straight and arc lengths of EAC.
RESULTS: Distances from CA, CO, CCi and CCo to Pfrkt were all shorter in CAS group than control group (p<0.05). The straight and arc lengths of cartilaginous EAC in CAS group were shorter than control group (p<0.05). Straight and arc lengths of EAC in CAS group were shorter than those in control group (p<0.05). The proportion of one bending in cartilaginous EAC in control group was significantly lower than CAS group (p<0.05). Orientations of EAC bendings in CAS group differed from those in control group (p<0.05).
CONCLUSIONS: In addition to smaller diameters, compared with normal EAC, the position of CAS patients\' osseous EAC was higher compared with the normal. The majority of CAS patients have a bending and downward slanting cartilaginous EAC. Orientations of EAC bending in CAS patients were different from normal. Besides, the length of CAS patients\' cartilaginous EAC was shorter. However, there were no significant differences between CAS patients and normal people in length of osseous EAC. These differences in anatomic parameters could provide the basis for optimizing the meatoplasty.

Malignant External Otitis (MEO) usually occurring in middle aged or elderly diabetics is uncommonly seen in children and rarely in infants. Various studies done so far have proved that immunological disturbance is present in case of MEO, Eliashiv et al (1978) and Yust et al (1980) have proved that cell mediated immunity is depressed in cases of MEO occurring in diabetics. MEO occurring in a four month old grosslly immunadeficient infant is indeed a very rare presentation. Occurrence of MEO in immttuo-suppressed children, & in cases of AIDS, and conclusions of various immunological studies along with this presentaion emphasize the need of regular immuological work up in all cases of MEO.