Osteoid osteoma of the temporal bone manifesting as first bite syndrome and a meta-analysis combined with osteoblastoma

Temporal bone osteoblastoma involving temporomandibular joint diagnosed as simple disc disorders: A case report

Background

Osteoblastoma is quite rare in the oromaxillo-facial region, while the mandible is always the predilection. However, in our case, the lesion was located in the left temporal articular tubercle, involving the adjacent skull base, which is extremely rare in the literature.

Case reports

It had been diagnosed as the most common temporomandibular joint disorder in the local hospital before the patient came to our department, mainly due to the primary symptom, that was, the patient got pain in the left temporomandibular joint area while opening the mouth. However, we found a mass of bone lesions at the left temporal articular tubercle in MRI and cone beam CT, and it turned out to be an osteoblastoma after surgery. The patient's primary symptom disappeared after recovering from the surgery, and there have been no indications of complication or recurrence up to now.

Conclusion

Osteoblastoma is very rare in the temporomandibular joint region. It could easily miss the possibility of a benign tumor due to its unusual location and confusing chief complaint in this case. Our report provides experience in the identification of osteoblastoma in rare sites.

First Bite Syndrome: What Neurologists Need to Know

PURPOSE OF REVIEW

Though first bite syndrome is well known in surgical settings, it is not commonly included in the differential for sharp paroxysmal facial pain in the neurology literature. This paper will highlight the clinical features and relevant anatomy of first bite syndrome, with the goal of helping clinicians differentiate this from other similar facial pain disorders.

RECENT FINDINGS

First bite syndrome is severe sharp or cramping pain in the parotid region occurring with the first bite of each meal and improving with subsequent bites. Pathophysiology has been attributed to imbalanced sympathetic/parasympathetic innervation of the parotid gland. This is seen most typically in the post-surgical setting following surgery in the parotid or parapharyngeal region, but neoplastic etiologies have also been reported. It is common for patients to present with concurrent great auricular neuropathy and/or Horner's syndrome. Evidence regarding treatment is limited to case reports/series, however, botulinum toxin injections and neuropathic medicines have been helpful in select cases. It is critical for clinicians to be able to differentiate first bite syndrome from other paroxysmal facial pain. To help with this, we have proposed diagnostic criteria for clinical assessment. Patients often improve gradually over time, but symptomatic treatment with botulinum toxin or neuropathic medicine may be required.

Clinical and Pain-Related Characteristics of Idiopathic First Bite Syndrome Induced by Taste in Japanese Patients without Diabetes: A Retrospective Study of Five Cases

Objective

First bite syndrome (FBS) is a condition in which the first bite of each meal causes parotid pain. Etiologies of FBS include prior surgery of the upper cervical region and, rarely, head and neck tumors. Idiopathic FBS rarely presents in patients without a history of surgery or evidence of an underlying tumor. Idiopathic FBS may be categorized into two subtypes: that in patients with diabetes and that in patients without diabetes. Idiopathic FBS in patients without diabetes may be overlooked or misdiagnosed because the condition has been described only in a few case reports. We aimed to identify the clinical and pain-related characteristics of idiopathic FBS in patients without diabetes.

Methods

We retrospectively analyzed the clinical data of five patients without diabetes who were diagnosed with idiopathic FBS in our department between January 2010 and December 2016.

Results

Four of the five patients were female, and the overall median age was 52 years (range: 13–61). All patients immediately experienced parotid pain upon tasting food without chewing. Addition of an acidic solution to the ipsilateral posterior third of the tongue evoked parotid pain. The median degree of pain intensity and interference with eating due to pain was 9 (range: 3–10) and 9 (range: 5–10) on a numerical rating scale of 0–10, respectively. Idiopathic FBS was bilateral in two patients. Two patients had tenderness on mild pressure over the affected parotid region. Two patients presented with ipsilateral idiopathic Horner's syndrome.

Conclusions

Our findings indicate that the characteristics of idiopathic FBS in patients without diabetes are largely consistent with those previously reported in postoperative FBS, supporting the notion that idiopathic FBS is a subtype of FBS. Thus, it is necessary to consider idiopathic FBS during the evaluation of facial pain triggered at the beginning of a meal.

Primary First Bite Syndrome of the Parotid Gland: Case Report and Literature Review

OBJECTIVE

A case of primary first bite syndrome (FBS), diagnosed in a patient with nonspecific adenocarcinoma of the deep lobe of the parotid gland.

DATA SOURCES

A Medline literature search was conducted on PubMed, using the keywords "first bite syndrome."

REVIEW METHODS

Using primary FBS and existence of a definite etiology as inclusion criteria.

RESULTS

We report on an unusual case of primary FBS, which had no surgical history. After multiple examinations, the pain was localized to a mass in the deep lobe of the parotid gland. After tumorectomy, the FBS pain was significantly relieved. The postoperative pathological examination determined that the excised mass was a nonspecific adenocarcinoma. Reviewing the literature, we found that primary FBS was mostly caused by malignant tumors in the inferior temporal fossa, the deep lobe of the parotid gland, and (or) the parapharyngeal space. Surgery was reported to be an effective treatment.

CONCLUSION

The case highlights the critical importance of identifying the etiology of primary FBS. When manifested with a primary FBS, malignant tumors must be high on the differential diagnosis list, especially those in the region of the inferior temporal fossa, the deep lobe of the parotid gland, and the parapharyngeal space.

First Bite Syndrome Following Rhytidectomy: A Case Report

Background:

First bite syndrome (FBS) is a known complication of parotid gland resection, parapharyngeal space dissection, and cervical sympathetic chain injury. It can be described as severe cramping or spasms in the parotid region triggered by the first bite of a meal, with the pain lessening during each subsequent bite. Although dissection for a rhytidectomy is in the vicinity of the parotid parenchyma, face-lift is not typically characterized as a procedure that can lead to FBS.

Case description:

A 53-year-old female underwent a deep plane face-lift to address her goals of improving jowls, nasolabial folds, and cervicomental angle. Intraoperatively, the dissection proceeded without any complications. Initially, her postoperative course was uneventful; 3 weeks after surgery, she noticed pain at the start of mastication that would improve throughout the course of a meal. She elected to proceed with observation. At 6 months after surgery, she began to experience improvement in her symptoms, and shortly thereafter had complete resolution.

Discussion:

First bite syndrome is a complication associated with deep lobe parotid resection, first described in 1998. The innervation of the parotid gland is complex and includes contributions from the auriculotemporal nerve, the great auricular nerve, and the cervical sympathetic chain. During rhytidectomy, dissection occurs along the parotidomasseteric fascia in order to elevate a flap of the superficial musculoaponeurotic system. Inadvertent injury to the parotid parenchyma can lead to damage to the postganglionic sympathetic fibers innervating the myoepithelial cells. Ultimately, expectant management is the mainstay of treatment and symptoms typically resolve within 6 months to 1 year.

Conclusion:

First bite syndrome is a complication that can be seen with a variety of facial surgeries. In the case of rhytidectomy, FBS should be considered a potential risk, as dissection into the parenchyma of the parotid gland can result in postoperative autonomic dysfunction.