Intramuscular myxoma of the masseter muscle. A case report

Rare Intramuscular Myxoma Involving the Pterygoid and Masseteric Muscles: A Case Report

Myxomas, characterized by abundant mucoid stroma and spindle cells, represent a subset of benign soft tissue tumors. Intramuscular myxomas in the maxillofacial region are rare, posing diagnostic challenges. We present the case of a 58-year-old male who reported limited jaw movement. Physical examination revealed asymmetry, restricted mouth opening, and left lateral jaw movement. Imaging confirmed a well-defined myxomatous mass. Core needle biopsy confirmed an intramuscular myxoma involving the pterygoid and masseteric muscles. A multidisciplinary team opted for surveillance due to its benign nature. Follow-up at six months showed stable findings, supporting the decision for non-surgical management. This case highlights the diagnostic and management challenges of rare intramuscular myxomas in the maxillofacial region. A comprehensive diagnostic work-up, including clinical, radiological, and histopathological data, is crucial. Non-surgical management, guided by a benign nature, underscores the importance of judicious and multidisciplinary approaches. Regular follow-up contributes to understanding the natural history of intramuscular myxomas, emphasizing the need for vigilant monitoring in soft tissue tumor management.

Intramuscular Myxoma of the Intrinsic Muscles of the Tongue: A Case Report with Literature Review

Myxoma is a benign tumor of mesenchymal origin. It frequently occurs in the muscles of the hip and extremities; however, it rarely occurs in the head and neck region. This report describes the second case of an intramuscular myxoma of the tongue. A 23-year-old woman was referred to our institution for the diagnosis and treatment of a left tongue lesion. T2-weighted magnetic resonance imaging revealed an 8 × 6-mm mass in the tongue. Based on a clinical diagnosis of a tongue tumor, excisional biopsy was performed under general anesthesia. The histopathological diagnosis was an intramuscular myxoma. The postoperative course was uneventful, and there was no evidence of tumor recurrence 3 years after surgery.

Oral intramuscular myxoma: case report and brief review of the literature

OBJECTIVE

Myxomas are rare benign mesenchymal soft tissue tumors that seldom affect the head and neck area. The present report describes a rare case of intramuscular myxoma of the oral cavity and briefly reviews the literature regarding the occurrence of these lesions in the maxillofacial area.

STUDY DESIGN

A 59-year-old patient was referred for the development of a slow-growing tumefaction in the right buccal mucosa in the previous 12 months. Magnetic resonance imaging was performed to characterize the lesion's dimensions and its relationship with the surrounding structures, and it revealed intramuscular localization in correspondence with the medial pterygoid muscle. Incisional biopsy was carried out to aid in the final diagnosis.

RESULTS

Histology revealed the presence of an intramuscular myxoma, characterized by discontinuous margins and locally infiltrating muscular fibers. A second surgery was performed to totally remove the lesion. Follow-up at 6 months did not show any signs of recurrence. A literature search was performed to retrieve data on the incidence of oral intramuscular myxomas.

CONCLUSIONS

To the best of our knowledge, this is the first case of intramuscular myxoma of the medial pterygoid muscle reported in the literature. Although rarely encountered, intramuscular myxomas should be considered when performing differential diagnoses of soft tissue masses at the level of the masticatory muscles.

Intramuscular myxoma of the paraspinal muscles: A case report and systematic review of the literature

Intramuscular myxoma (IM) is a rare mesenchymal tumor of the head and neck region. The current study reports a case of a 45-year-old man who presented with a painless neck mass. Imaging showed involvement of the levator scapulae and scalene muscles. Core needle biopsy was consistent with intramuscular myxoma. Surgical excision was performed and follow-up for 30 months showed no recurrence. The present study includes a systematic review of head and neck IMs, with a summary of the clinical and demographic parameters of all reported cases in the head and neck region. Surgery was curative in 28 of the 29 published cases, as well as in the current case (96.7%), with the lone recurrent tumor cured following re-resection. Females constituted 57% of the cases and the mean age was 49.7±20.4 years. Although uncommon, IM should be considered in the differential diagnosis of deep neck masses, and surgical excision is the treatment of choice with a low risk of recurrence.

Intramuscular myxoma of the cervical paraspinal musculature: case report and review of the literature

CASE

A 57year old female patient presented with a painful right-sided neck mass that on MRI was shown to be adherent to the posterior aspect of the sternocleidomastoid muscle. The mass was surgically resected en bloc without complications. Histopathologic analysis revealed the mass to be a myxoma.

REVIEW

To date, there have been several case reports of myxomas, although very few involving the head or neck. The majority of the literature available concurs that myxomas are benign neoplasms that exhibit characteristic qualities on MRI imaging. The definitive treatment by consensus is surgical excision.

CONCLUSIONS

Although the incidence of head and neck myxomas is low, it is important to include in the differential of a neck mass with certain radiographic findings.

Intramuscular myxoma of the hyoglossus muscle: A case report and literature review

Intramuscular myxoma (IM) is a benign intramuscular neoplasm composed of fibroblasts and abundant myxoid stroma. IMs most commonly affect larger skeletal muscles, while those affecting the oral and maxillofacial regions are rare, with a small number of documented cases in the available literature. The aim of the present study was to describe a highly rare case of an IM within the hyoglossus muscle of the tongue in a 74-year-old male. The patient presented with a painless mass in the submental space that had been growing slowly for more than five years. A computed tomography scan revealed a hypodense lesion located in the root of the tongue. The mass was easily excised with thin margins, including only a small amount of the adjacent muscle tissue. The pathological diagnosis of the mass was an IM. The patient made an excellent recovery following the surgery and the follow-up three years later revealed no local recurrence. IMs of the hyoglossus muscle are highly rare, however must be considered in the differential diagnosis of swellings in the root of the tongue region.

Intramuscular Myxoma

Intramuscular myxoma is an uncommon benign soft tissue tumor that may arise from fibroblasts that produce an excessive amount of mucopolysacchrides. It is typically seen in adults in the large muscles of extremities and exhibits typical radiological features on sonography and magnetic resonance imaging. A case of intramuscular myxoma in the left Vastus intermedius is described in a 52-year-old man who presented with gradually increasing swelling in the thigh. The case illustrates characteristic radiologic “bright cap and rim” signs with pathologic correlation.

Transoral resection of a retropharyngeal myxoma: a case report

This study was conducted to describe a retropharyngeal myxoma and discuss clinical concerns regarding this pathology and a retropharyngeal site of occurrence. We present a case report and review of literature. A 71-year-old woman presented with mild right neck pressure for 3 weeks. Imaging studies and head neck examination confirmed a 5.3 × 3.1 × 1.0 cm retropharyngeal mass with no communication to the vertebral column but was intimately involved with the pharyngeal mucosa. A transoral fine needle aspiration biopsy suggested a possible spindle cell neoplasm. A presurgical swallowing consultation was obtained. A transoral excision of the tumor was possible with no intraoperative complications. Histopathology was a cellular myxoma. Postoperative dysphagia required swallowing therapy and nasogastric tube feeding for 2 weeks before oral intake was possible. The patient has no evidence of clinical or radiological recurrence more than 1 year after surgical intervention. We present the second case of a myxoma in the retropharynx reported in English literature. Transoral excision was safe, feasible, and cosmetically appealing option in our patient. Additional clinical data are required to valid its safety and utility as an approach to tumors in the retropharynx. Postoperative dysphagia can be significant and consequently we recommend preoperative swallowing evaluation and counseling.

Intramuscular myxoma of the left leg-Case report of the lesion observed for several years

AIM

The aim of this study was to present the process of diagnosis and treatment of a patient with diagnosed intramuscular myxoma in the left lower limb.

BACKGROUND

Myxomas are benign neoplasms which can be found within large muscle groups. Histologically, these neoplasms are composed of a few elongated or star-shaped cells lying in abundant mucoid stroma. These tumours are characterized by expanding growth without forming distant metastases.

CASE DESCRIPTION

A man, 58, came to the Surgical Oncology Outpatient Clinic due to pain ailments and a growing tumour located in the rear group of the left shank muscles. The patient had been observing the lesion for several years, but related the occurrence of pain to the change in the nature of his job - from sedentary to standing. The patient underwent diagnostic imaging, a magnetic resonance imaging test, in which a tumour was described. A surgery was carried out where the tumour was resected together with the lateral head of the gastrocnemius muscle. No significant walking disorders, neurological deficits, either sensory or motor were observed. The follow-up imaging examinations, which were carried out a year after the surgery, did not reveal a relapse. The patient remains under the care of the Surgical Oncology Outpatient Clinic.

CONCLUSION

Myxomas are a group of benign neoplasms whose first symptom is the appearance of a palpable tumour whose stretching growth causes painful ailments. After magnetic resonance imaging and a diagnosis, it is necessary to plan the surgery. Radical resection of the lesion is a method of choice which guarantees long-lasting recovery.