Adenomatoid hyperplasia of lower lip

Pediatric upper lip myopericytoma: a case report and comprehensive review

BACKGROUND

Myopericytoma is a rare spindle cell tumor of mesenchymal origin, typically benign, characterized by concentric proliferation of tumor cells around blood vessels within subcutaneous tissue. It primarily occurs in middle-aged adults and is often located in distal extremities, although cases have been reported in proximal extremities and head-neck regions. However, occurrences within the oral cavity are exceedingly rare. To date, literature reviews have identified only two cases in children under 10 years old and reported only five cases of myopericytoma occurring in the lip region. We provide a comprehensive review and analysis of all documented cases to better understand this condition.

CASE PRESENTATION

A 7-year-old girl presented to oral and maxillofacial surgery with the discovery of a painless mass on the inner aspect of the upper lip. The diagnosis of myopericytoma was confirmed by histological examination (HE staining), alcian blue staining, and immunohistochemistry.

CONCLUSIONS

Following surgical excision, there were no signs of recurrence at a 3-month follow-up. The pathological diagnosis of myopericytoma is quite challenging, and immunohistochemical testing is necessary.

Adenomatoid hyperplasia of minor salivary glands: A case report in an unusual site

INTRODUCTION AND IMPORTANCE

Adenomatoid hyperplasia (AH) is an unusual entity which simulates salivary gland neoplasm. As suggested some lesions indicate reactive hyperplasia due to the chronic trauma by the ill-fitting complete dentures but here in the present case it's due to a fixed prosthesis. Here is an AHMSG occurring in a rare location that is in the lingual vestibule. Meticulous histopathological examination is an effective diagnostic tool to arrive in the diagnosis of AH.

CASE PRESENTATION

A 60 years male patient with a lesion in the lingual vestibule of slow growth and an ulcer noted on the surface due to the trauma from the prosthesis. The patient was unaware of the growth and a provisional diagnosis made by the clinician was an irritational fibroma with traumatic ulcer but the final diagnosis turned to be AHMSG.

DISCUSSION

The present case and previous case series suggest AH has a male preponderance. Histological analysis is a basic fundamental in arriving at a proper diagnosis. It's a 102-case added to the available web knowledge world-wide on AHMSG and the 4th case in India to be noted in the Indian literature.

CONCLUSION

The differential diagnosis of the lingual vestibular placed exophytic lesions should include AHMSG.

Lip salivary-gland hamartoma in a cynomolgus macaque (Macaca fascicularis)

An incidental, asymptomatic, well-circumscribed, solitary, submucosal nodular mass was detected on the mucosal surface of the inner lower lip in a female cynomolgus macaque (age, approximately 2.4 y) during a juvenile chronic toxicology study. Grossly, the nodule was soft with brown to tan discoloration and measured approximately 4 mm in diameter. Microscopically, the nodule was covered by normal stratified squamous epithelium and composed of well-circumscribed irregular lobules containing hyperplastic and normal-appearing mucinous salivary gland acini and ducts, which were separated by thick connective tissue septae. In light of the gross pathology and results of microscopic examination, salivary gland hamartoma was diagnosed. This lesion resembles adenomatoid hyperplasia of mucous salivary glands in humans, which is a rare nonneoplastic swelling. To our knowledge, this case description is the first report of a cynomolgus macaque with the rare entity of lip salivary gland hamartoma, which likely represents adenomatous hyperplasia in humans.