Nasal tissue-derived hamartoma in the maxillary gingiva of a calf. Issue 1 (December 2016)

• Record Type: Journal Article
• Authors: Tsuka, Takeshi; Morita, Takehito; Tanaka, Hinako; Kono, Shinji; Murahata, Yusuke; Azuma, Kazuo; Osaki, Tomohiro; Ito, Norihiko; Okamoto, Yoshiharu; Imagawa, Tomohiro
• Is Part Of: BMC veterinary research. Volume 12:Issue 1(2016)
• Page Start: 1
• Page End: 4
• Publication Date: 2016-12
• Subjects: Calf -- Computed tomography -- Hamartoma -- Maxillary gingiva -- Nasal tissue; Veterinary medicine -- Research -- Periodicals; Veterinary medicine -- Periodicals; 636.0890724
• DOI: 10.1186/s12917-016-0637-4
• Languages: English
• ISSNs: 1746-6148

Abstract

Abstract Background All of oral hamartomas has been previously found in mandibular gingiva in younger calves, and were histologically diagnosed as a vascular hamartoma. This is the first case report describing a calf with a mass in the maxillary gingiva that was histologically diagnosed as a nasal tissue-derived hamartoma. Case presentation A 13-day-old male Holstein calf presented with a horn-like mass in the left rostral maxillary gingiva. Surgical removal revealed that the mass had a dual structure composed of cartilaginous and soft tissues and extended deeply toward the nasal cavity. Excised tissues mainly consisted of two types of mature cells without mitotic figures and atypia: 1) the cartilage-like structures consisted of an island and a meandering massive focus of mature cartilaginous tissues, and 2) tubular structures consisting of stratified ciliated mucosal columnar cells with gland-like structures and aggregated goblet cells. The mass was diagnosed as a nasal tissue-derived hamartoma because these two types of structures were histologically identical to nasal structures. The present case had no recurrence at 1 year after surgery. Conclusions To our knowledge, this is the first description of the calf with nasal tissue-derived hamartoma in the maxillary gingiva.