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o <br />© <br />UNIVERSITY OF MINNESOTA <br />TWIN CITIES <br />Owner: Karen Cuff <br />Wayzata, MN <br />Minnesota Veterinary Diagnostic Laboratories <br />College of Veterinary MeOidne <br />1943 Carter Avenue <br />St. Paul, Minnesota 55108 <br />(612) 625-8787 <br />Date: December 22, 1988 <br />Long Lake Veterinary Ciirnc <br />1854 W. Wayzata Blvd, Box 10 <br />Long Lake, MN 55356 <br />Specimen: One fixed skin mass and <br />received. <br />•Accession No.: 088-33078 <br />Received: 12-20-88 <br />Species: canine <br />Breed: Sex: M <br />Age: 6 yr, 8 yr Weight: <br />Herd/Flock Size: <br />Clinical Signs: <br />90#, 75# <br />tfiy <br />small fragments of a second mass were <br />Gross: <br />Histopath: <br />The larger mass was brownish-white, firm, smooth, spherical, and <br />measured 1 cm in diameter. The fragments were dark red to brown. <br />The first mass is partially encapsulated and consists of sheets and <br />islands of mature fat cells separated by moderate to abundant mature <br />fibrous connective tissue. Fat cells are detected at all margins of <br />the mass. <br />The second mass is an unencapsulated neoplastic prolferation of <br />various sized spindled or stellate cells often forming vascular <br />channels filled with red Hood cells. In occasional areas, these <br />cells are closely spaced and form large sheets of streaming cells. <br />\The various sized and spindled to stellate cells have a moderate <br />amount of finely vesicular to fibrillar amphophilic cytoplasm, one <br />or two oval to fusiform hyperchromatic nuclei with uniformly <br />staining chromatin and multiple prominent nucleoli. Mitotic figures <br />are rare. A few neutrophils are diffusely scattered throughout the <br />* mass. There are occasional small foci of bright yellow fine granu­ <br />lar pigmented material and occasional macrophages which contain <br />various sized golden brown intracytoplasmic granules. There are two <br />to four mitotic figures per HPF (x 400). <br />' .» <br />Comments: Neoplastic fat cells extend to the margins of the one mass. <br />• •* j <br />y#- <br />Sumtiary:1. Lipoma <br />2. Fibrosarcoma <br />Rodney K. Frank, DVM <br />RKF:jw <br />Report: Tele_ _ _ _ <br />Written 121221^^ Addendum