Results indicated that FIP continues to be a clinically important disease in North America and that sexually intact male cats may be at increased risk, and spayed females at reduced risk, for FIP. The high prevalence of FIP and lack of effective treatment emphasizes the importance of preventive programs, especially in catteries.
A hamartoma is a localized overgrowth of mature cells gingival lesion revealed multiple lobules of cells having oval that are normally found in an organ. 6 Although the cellular basophilic stippled nuclei and small to moderate amounts of components of a hamartoma are normal, there is a loss of lightly basophilic cytoplasm. Cells frequently formed capilorderly growth, often resulting in a disorganized accumula-lary spaces although a few ectatic vascular channels containtion of cells indigenous to the organ. The lesion is a form of ing blood were present. Seropurulent debris covered the ulcongenital anomaly and is not a true neoplasm. Hamartomas cerated capillary proliferation. may be composed of epithelial, mesenchymal, or a combi-The third case, a 1-month-old Hereford calf, was presented nation of both cell types. Because vascular tissue is ubiqui-for examination of a red ulcerated mass that measured aptous, vascular hamartomas may occur at any site of the body. 7 proximately 6 cm in diameter. The mass was located in the This report describes gingival vascular hamartomas in 3 rostra1 mandibular gingiva just lateral to the left central incalves. Tissue was surgically removed from each of the 3 cisor tooth. The owner had discovered the lesion 1 week cases, placed in 10% buffered neutral formalin, and submitted prior to presentation, and the mass had enlarged rapidly to C. E. Kord Animal Disease Laboratory for histologic eval-during the previous week. Surgical excision was attempted. uation. Margins of the lesion were indistinct and extended deep into A 5-day-old female Chianina calf was presented to the the submucosa. Microscopically, the lesion was virtually veterinarian for an oral mass that was noted at birth. The identical to the previously described cases. mass was located in labial gingiva at the level of the right Congenital lesions of vascular tissue are rare in animals. lower first incisor tooth and was surgically removed. Ap-Vascular hamartoma has been described in 2 cross-bred Frieproximately 3 weeks later, the owner noted regrowth of the sian calves. 8 In each case, the mass arose in the mandibular mass, and a second veterinarian was consulted. The tissue gingiva near the central incisor. Regrowth of the tissue ocwas again surgically resected and submitted for histopath-curred following incomplete excision. Thermocautery was ologic evaluation. The clinician's impression at the time of effective in preventing recurrence. surgery was that of an "infective or invasive organism, or Gingival vascular hamartoma was also reported in a 5-week tissue." Fresh tissue was submitted for bacterial culture. The old male Simmental-cross calf and a 2-month-old female initial tissue submitted for examination measured 3.0 × 2.3 Holstein Friesian calf. 9 In these cases, a pedunculated mass × 1.4 cm and was mottled tan and gray. There was extensive was located in the rostra1 mandibular gingiva near the inciulceration present with only a few areas of intact mucosa sors. Diagnosis was based on incisional biopsy, which reremai...
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