Legume-associated residual cyst

Hyaline ring granuloma of the mouth-A foreign-body reaction that dentists should be aware of: Critical review of literature and histochemical/immunohistochemical study of a new case

Hyaline ring granuloma (HRG) is a rare and atypical foreign-body granulomatous chronic inflammatory condition. Our aim was to make a critical review of the literature cases and also to illustrate histochemical and immunohistochemical findings of a new case. A modified PICO strategy was used. Inclusion criteria were met by case reports and case series with a histologically confirmed diagnosis of HRG, necessarily in mouth or maxillary bones. Exclusion criteria were no access to the full-text paper. The search was done up to 2019, totalizing 231 selected cases in 54 papers. The new case was analyzed through PAS, Azan-Mallory's trichrome, and CD34 and CD68 reactions. HRG is found mainly in the mandible of men, edentulous and prosthesis users, between 51 and 60 years of age, with 0.5-120 months of duration, usually causing edema and pain or discomfort. Endogenous and exogenous theories may be complementary in HRG. Eosinophilic areas could represent particles of vegetal origin, while the hyaline material could be the result of collagen degradation. Considering the material is not always present or even is ring-shaped, we suggest the change from "hyaline ring granuloma" to "granuloma induced by vegetal inoculation."

Mandibular Osteolytic Lesion Associated with Exuberant Hyaline Ring Granuloma Reaction

OBJECTIVE

To report an unusual case of oral hyaline ring granuloma (HRG) that caused an extensive osteolytic lesion.

CLINICAL PRESENTATION AND INTERVENTION

A 22-year-old female was referred to our hospital with a large expansile cystic lesion in the left mandibular ramus associated with a clinically visible, partially erupted third molar. A diagnosis of paradental cyst was made. After marsupialization of the lesion, histopathological analysis of the surgical specimen showed an unusual exuberant HRG reaction supported by scarce fibrous stroma.

CONCLUSION

This was a case of exuberant HRG reaction that caused extensive bone destruction.

Oral pulse granuloma associated with keratocystic odontogenic tumor: Report of a case and review on etiopathogenesis

Pulse granuloma is a distinct oral entity characterized as a foreign body reaction occurring either centrally or peripherally. It is usually seen in the periapical or in the sulcus area. Occasionally the lesions occur in the wall of the cyst, commonest being the inflammatory odontogenic cyst. Histologically, they present as eosinophilic hyaline mass with giant cell inclusions and inflammatory cells. They may show different histological characteristics, possibly related to the length of time in the tissue. Adequate recognition is important to avoid misdiagnosis. Many authors suggest that pulse granuloma results due to implantation of food particles of plant or vegetable origin into the tissue following tooth extraction. This paper aims to report a case of pulse granuloma associated with keratocystic odontogenic tumor with its histochemical and polarizing microscopic features and discuss on etiopathogenesis of pulse granuloma.

Peridiverticular colonic hyaline rings (pulse granulomas): Report of two cases associated with perforated diverticula

Hyaline ring (pulse granuloma) is a rare benign lesion of the oral cavity soft tissues characterized by round or oval structures with scalloped borders composed by a collagenous matrix variable associated with inflammatory and foreign bogy giant cells. Vegetable fragments are variably identified. Whereas most cases occur in the oral cavity, it has also been described in other sites such as the lung and rectum. It is thought by most to represent a reaction to foreign materials. We report two incidentally discovered cases of colonic hyaline rings associated with perforated diverticulitis. Vegetable residues were seen in both cases.