Chronic serous otitis media (often referred as chronic otitis media with effusion) is the most common cause of deafness and hearing loss in early childhood [1] [2] [3]. The pathogenesis involves the accumulation of fluid in the middle ear without damage to the tympanic membrane [2] [4]. The pathogenesis remains unclear, but bacterial microorganisms have been identified in some patients [4]. Nevertheless, an induced production of arachidonic acid metabolites, such as leukotrienes and prostaglandins, could lead to tympanic membrane damage [1].

It was established that up to 80% of all children under 10 years of age will suffer from at least one episode of otitis media with effusion, while the main patient population affected by this ear disorder is aged between 3-7 years [1] [2] [3]. The key manifestation is a bilateral hearing loss that resolves spontaneously, while some children report a tingling sensation [1] [2] [3]. Other symptoms include otalgia and a sensation of pressure in the ear [1] [3].

Acute otitis media (AOM) is often the main precipitating event in young children, whereas an infection of paranasal sinuses seems to be the main risk factor for the development of chronic serous otitis media in the adult population [2] [5]. Although the condition is benign and self-limiting in the majority of cases, many reports have emphasized the risk of inadequate language development in cases of persistent chronic serous otitis media [1] [3]. Furthermore, the vestibular function can be affected as well, producing symptoms such as poor balance and coordination [1] [2] [3].

Because chronic serous otitis media poses a significant risk for inducing deafness in early childhood, an early diagnosis is of critical importance. The first part of the diagnostic workup should be a thorough patient history during which the course of symptoms, their progression, as well as severity, should be assessed, together with a history of previous ear infections [1] [3]. In the presence of auditory complaints, the physical examination should pay special attention to the inspection of the ear, mainly through otoscopy and otomicroscopy [1] [3]. The initial findings can be retracted tympanic membrane and a shortened malleus, whereas a clear or blue-to-yellow fluid can be observed through the ear drum [3].

In serious cases, hearing testing should be conducted [1]. Conductive hearing loss ranging from 10-50 dB is mainly observed, depending on the amount and viscosity of the fluid [3]. Appropriate therapeutic strategies are designed, based on the severity of hearing loss, ranging from further testing and conservative treatment to surgery [1].

Treatment for CSOM often begins with watchful waiting, as the condition can resolve on its own. If the fluid persists, options include the use of nasal steroids or decongestants to reduce fluid buildup. In some cases, a minor surgical procedure called myringotomy may be performed, where a small incision is made in the eardrum to drain the fluid. Sometimes, a tiny tube is inserted to keep the middle ear ventilated.

The prognosis for Chronic Serous Otitis Media is generally good, especially with appropriate management. Many cases resolve spontaneously, particularly in children. However, if left untreated, persistent fluid can lead to complications such as chronic hearing loss or structural changes in the ear. Early intervention can help prevent these outcomes.

CSOM often results from Eustachian tube dysfunction, which impairs the drainage of fluid from the middle ear. This dysfunction can be due to allergies, upper respiratory infections, or anatomical differences. In children, the Eustachian tube is shorter and more horizontal, making them more susceptible to fluid retention.

Chronic Serous Otitis Media is most prevalent in children, particularly those between the ages of 2 and 5. It is estimated that up to 90% of children will experience at least one episode of otitis media with effusion by age 10. The condition is less common in adults but can occur, especially in those with chronic sinusitis or allergies.

The pathophysiology of CSOM involves the accumulation of fluid in the middle ear due to Eustachian tube dysfunction. This tube connects the middle ear to the back of the throat and helps equalize ear pressure. When it fails to function properly, fluid can build up, leading to the symptoms associated with CSOM.

Preventive measures for CSOM include managing allergies and avoiding upper respiratory infections. Ensuring good nasal hygiene and avoiding exposure to tobacco smoke can also help. In children, breastfeeding and avoiding bottle-feeding while lying down may reduce the risk of developing the condition.

Chronic Serous Otitis Media is a common condition characterized by fluid accumulation in the middle ear, leading to hearing difficulties. It is most prevalent in children but can affect adults. Diagnosis involves clinical evaluation and hearing tests, while treatment ranges from observation to surgical intervention. With proper management, the prognosis is generally favorable.

If you or your child experiences persistent hearing loss or a sensation of fullness in the ear, it may be due to Chronic Serous Otitis Media. This condition involves fluid buildup in the middle ear and can affect hearing. It is important to monitor symptoms and seek medical advice if they persist. Treatment options are available, and many cases resolve on their own.

1. American Academy of Family Physicians; American Academy of Otolaryngology-Head and Neck Surgery; American Academy of Pediatrics Subcommittee on Otitis Media With Effusion. Otitis media with effusion. Pediatrics. 2004;113(5):1412-1429.
2. Qureishi A, Lee Y, Belfield K, Birchall JP, Daniel M. Update on otitis media – prevention and treatment. Infect Drug Resist. 2014;7:15-24.
3. Minovi A, Dazert S. Diseases of the middle ear in childhood. GMS Curr Top Otorhinolaryngol Head Neck Surg. 2014;13:Doc11.
4. van Zon A, van der Heijden GJ, van Dongen TM, Burton MJ, Schilder AG. Antibiotics for otitis media with effusion in children [review] Cochrane Database Syst Rev. 2012;9: CD009163.
5. Finkelstein Y, Ophir D, Talmi YP, Shabtai A, Strauss M, Zohar Y. Adult onset otitis media with effusion. Arch Otolaryngol Head Neck Surg. 1994;120(5):517–527.