Giant Leiomyomatous Hamartoma of the Tongue

A systematic review of the clinicopathological characteristics of oral leiomyomatous hamartoma

BACKGROUND

Oral leiomyomatous hamartoma (OLH) corresponds to an abnormal, benign and disorganized overgrowth of mature smooth muscle tissue, which can develop in any site where this tissue is found in healthy conditions. The present systematic review aimed to analyze the clinicopathological characteristics of OLH.

MATERIALS AND METHODS

The protocol of this study was constructed following the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) and was registered in the Open Science Framework (OSF): OSF.IO/BMPUX. Five electronic databases were used to identify studies for this systematic review: PubMed, Web of Science, Dentistry & Oral Science Source, Scopus and ScienceDirect, from January 15th, 1945 to January 10th, 2024. The Joanna Briggs Institute (JBI) tool was used to assess the risk of bias and the quality of the included reports and case series.

RESULTS

A comprehensive search yielded 5,562 articles, of which 55 met the inclusion criteria. The total number of subjects studied in the included investigations was sixty-six. The subjects' ages varied from newborns to 61 years, with a mean age ± standard deviation of 71.23 ± 123.01 months. 50.7% were males and 49.3% were females. Most lesions presented normochromic color (24.24%), pedunculated base (31.81%), firm consistency (22.72%), with an average size of 1.20 cm, present on the dorsum of the tongue (31.81%) or anterior part of the alveolar border of the maxilla (30.30%). Treatment was carried out by surgical excision (78.46%) and half of the studies report that there were no recurrences.

CONCLUSIONS

The cases described in the medical-dental literature provide valuable information to date on the clinicopathologic and immunohistochemical profile of OLH. Although it is a rare lesion, it should be considered as part of the differential diagnosis in newborns, infants, children and young adults with lingual and/or maxillary masses present in the midline.

Oral leiomyomatous hamartoma: presentation of 3 cases and review of the literature

Oral leiomyomatous hamartoma (OLH) is a rare lesion, with only 40 cases reported in the literature. It typically presents early in life as a nodule on the anterior maxillary alveolar tissues or the tongue. Its growth potential is limited, with few cases reaching dimensions >2.0 cm, and its microscopic composition includes an intact surface mucosa with an underlying fibrovascular stroma possessing an unencapsulated proliferation of smooth muscle fascicles. Excision is considered the definitive treatment. Here we describe the clinical, microscopic, histochemical, and immunohistochemical features and management of 3 cases of OLH and review the literature. The findings we present here can assist in performing differential diagnosis, particularly in discriminating between OLH and similar yet non-hamartomatous processes and in selecting appropriate management.

A Case of an Infantile Lingual Leiomyomatous Hamartoma

Lingual leiomyomatous hamartomas are rare lesions of the tongue with largely unknown mechanisms of formation. These lesions are often asymptomatic, though they may present with symptoms, particularly relating to swallow function. Workup should include imaging of the head and neck, and diagnosis should be made histologically. Treatment is surgical excision. This case is a report of a 4-week-old female who presented for evaluation of an asymptomatic 1 × 1 cm dorsal midline tongue mass discovered at birth. The patient was monitored until the age of 9 months, at which time the mass was surgically excised. The patient had an uncomplicated postoperative course. Pathological analysis yielded a diagnosis of leiomyomatous hamartoma.

Congenital smooth muscle hamartoma of the tongue in a neonate — a case report

Background

Hamartoma is a benign, tumor-like proliferation of mature tissue that is natural to the organ from which it developed. Oral hamartomas are rare and can occur as an isolated finding or as a part of a syndrome.

Case presentation

We report a 4-day-old male neonate who was postnatally noted to have a large 3.5 × 3.5 cm lobulated mass over the tip of the tongue. The mass was causing protrusion of the tongue and feeding difficulties following which surgical excision was planned. The postoperative recovery was uneventful.

Conclusion

Although rare, lingual hamartomas should be considered in the differential diagnosis algorithm for congenital tongue lesions. The definitive diagnosis is histopathological with complete resection of the tumor resulting in a favorable prognosis.

Lingual Hamartomas: Clinical Characteristics, Diagnostic Evaluation, Treatment, and Outcomes

OBJECTIVES/HYPOTHESIS

To further clinically characterize lingual hamartomas, and to consolidate literature by analyzing clinical presentation, diagnostic evaluation, treatment, and outcomes.

STUDY DESIGN

Retrospective chart review and literature review.

METHODS

Case series from 1989 to 2020 at a tertiary pediatric center; follow-up ranging from 2 months to 12 years. Patient demographics, clinical presentations, physical examination findings, surgical pathology, operative methods, pre-operative imaging, and follow-up. A review of English-language literature from 1945 to 2020 was conducted.

RESULTS

Seven patients (four male, three female) with nine lingual hamartomas were identified. Average age at surgical excision was 7.9 months (SD 3.5 months, range 3 to 14 months). Follow-up ranged from 2 months to 12 years, with all patients having no recurrence. Physical examination identified five pedunculated hamartomas and two sessile hamartomas. One patient had a neck CT, one had neck ultrasound, and two had facial MRIs. CT and ultrasounds confirmed presence of cervical thyroid. MRI suggested no muscular invasion for one patient, whereas motion artifact obscured findings for the other patient. Most patients who presented with dysphagia or poor weight gain achieved post-surgical improvement. The present cases combined with the literature review identified 57 patients with 63 lingual hamartomas.

CONCLUSIONS

Lingual hamartomas appear as hypovascular pedunculated masses near the foramen cecum. There is no demographic predisposition, and most are identified during infancy. Imaging is not necessary, unless there is concern for lingual thyroid, in which case thyroid ultrasound should be performed. Surgical excision is curative, with dysphagia resolution and low likelihood for recurrence.

LEVEL OF EVIDENCE

4 Laryngoscope, 131:E2080-E2088, 2021.

Leiomyomatous Hamartomas of the Oral Cavity: Clinicopathological and Immunohistochemical Features of 4 Cases and Literature Review

Objective. To present 4 new cases of oral leiomyomatous hamartomas (OLH), describing its clinical, microscopical, and immunohistochemical features, and a literature review. Methods. The OLH cases were retrieved from the files of 2 Brazilian and 1 Peruvian oral pathology services. Clinical data were obtained from the pathology reports. Microscopical features were reviewed, and immunohistochemical reactions were performed. A review of the English-language literature about OLH was done. Results. The sample was composed of 3 females (4-, 10-, and 15-year-old) and 1 male (3-year-old). Three cases affected the dorsum of the tongue and one the incisive papilla, and all presented sessile or pedunculated smooth nodules. Microscopically, the lesions were composed of varying-size fascicles of smooth muscle fibers in a fibrous connective tissue background. Immunohistochemistry revealed positivity of the smooth muscle bundles for myogenic markers. The English-language literature review revealed 38 OLH cases reported, most were congenital or diagnosed up to 5 years old. The main locations were tongue and anterior maxilla. Conclusions. Although OLH is a rare lesion, it must be considered in the differential diagnosis of midline tongue or maxillary masses in newborns, infants, and youngsters.

Congenital Midline Tongue Base Mass in An Infant: Lingual Hamartoma

Lingual hamartoma is a rare finding of congenital midline posterior tongue mass. The lesion may be seen as a single anomaly or maybe associated with syndrome especially the Oral Facial Digital Syndrome (OFDS). Here, we report an otherwise normal and healthy two-month-old boy with a congenital midline base of tongue mass presented with snoring and episodic vomiting since the age of 1 month. Tumour excision from the area of foramen of caecum recovered a pinkish pedunculated tumour. Histopathology examination confirmed the diagnosis of leiomyomatous lingual hamartoma. Differential diagnosis, especially for midline tongue mass and other paediatric tongue lesions are discussed. We also discuss the epidemiology, histopathologic features, treatment and prognosis of lingual hamartoma based on the literature review.

Gingival leiomyomatous hamartoma of the maxilla: a rare entity

Hamartoma is a tumour-like malformation appearing as a focal overgrowth of normal cells. Leiomyomatous hamartomas (LHs) are rare in the oral cavity and commonly seen in the Japanese and less than 40 cases have been reported in the Japanese and English literature. The clinical differential diagnoses are irritational (traumatic) fibroma and congenital epulis. It has to be differentiated histopathologically from its neoplastic counterparts and mesenchymomas. Hence, we report such a case of LHs, which presented as a sessile gingival growth occurring in the midline in a 15-year-old girl. The final diagnosis was based on the histopathological appearance which was confirmed by immunohistochemical staining of various markers. A review of the literature of previous cases was also carried out.

Gingival leiomyomatous hamartoma of the maxilla: a rare entity

Hamartoma is a tumour-like malformation appearing as a focal overgrowth of normal cells. Leiomyomatous hamartomas (LHs) are rare in the oral cavity and commonly seen in the Japanese and less than 40 cases have been reported in the Japanese and English literature. The clinical differential diagnoses are irritational (traumatic) fibroma and congenital epulis. It has to be differentiated histopathologically from its neoplastic counterparts and mesenchymomas. Hence, we report such a case of LHs, which presented as a sessile gingival growth occurring in the midline in a 15-year-old girl. The final diagnosis was based on the histopathological appearance which was confirmed by immunohistochemical staining of various markers. A review of the literature of previous cases was also carried out.

Lingual leiomyomatous hamartoma with bifid tip and ankyloglossia in a patient without oral-facial-digital syndrome: a case report and literature review

Here is a rare case of lingual leiomyomatous hamartoma (LLH) with bifid tongue tip and tongue-tie in a patient with non-oral-facial-digital syndrome (OFDS). A 29-year-old male consulted for a painless tumor over the midline of the tongue dorsum measuring 2 × 1.5 cm. The tumor was excised and the tongue-tie was corrected. Diagnosis of LLH was based on histo-pathologic and immuno-histochemical studies. The epidemiologic data and differential diagnosis of LLH, as well as related literature, are discussed. To date, only 14 cases of LLH have been reported in English literature. This may be the first reported case of LLH with bifid tip and ankyloglossia in a non-OFDS patient.

Case report of a congenital lingual leiomyomatous hamartoma: new epidemiologic findings and a review of the literature

We present an unusual case of a lingual leiomyomatous hamartoma, along with a current literature review of this previously under reported lesion. Described is a case of a 5 month-old male presenting with a posterior midline tongue mass and surgical excision yielded pathology consistent with a leiomyomatous hamartoma. A comprehensive literature review revealed thirty-nine cases of leiomyomatous hamartomas, a number much greater than previously reported. We conclude that these rare lesions are notably twice as common as previously reported and have equal gender predilection.

Unusual benign smooth muscle lesions of the tongue: review and report of two cases

Benign smooth muscle proliferations are relatively rare in the oral cavity. Most are classified as angioleiomyomas, some as hamartomatous growths and a few as cutaneous-type leiomyomas. We present two cases of benign smooth muscle proliferations in the tongue, provide a review, briefly discuss histogenesis and offer a clinico-pathological differential diagnosis.