. Biology of the laboratory mouse. Mice as laboratory animals; Mice; Animals, Laboratory; Mice. SPONTANEOUS NEOPLASMS IN MICE 193 cells. The architecture exhibits the same characteristics as are described under fibrosarcomas of the subcutaneous tissue in general. Mammary glands are present around this tumor and usually are invaded by the infiltrating tumor mass. Tumors in or Near the Mammary Line and Its Branches but Not Originating from the Mammary Gland Proper Tumors in or near the mammary line and its branches and not originating from mammary glands or their stroma may be either benign or m
. Biology of the laboratory mouse. Mice as laboratory animals; Mice; Animals, Laboratory; Mice. SPONTANEOUS NEOPLASMS IN MICE 193 cells. The architecture exhibits the same characteristics as are described under fibrosarcomas of the subcutaneous tissue in general. Mammary glands are present around this tumor and usually are invaded by the infiltrating tumor mass. Tumors in or Near the Mammary Line and Its Branches but Not Originating from the Mammary Gland Proper Tumors in or near the mammary line and its branches and not originating from mammary glands or their stroma may be either benign or malignant. While such tumors are in no essential way different from tumors in general. Carcinomatous foci Sarcomatous focus Fig. 103.—Carcinosarcoma of the mammary gland (X200). which are found subcutaneously, it is convenient to list and briefly describe them here because of the fact that confusion with true mammar}- tumors is possible if diagnosis is not carefully made. Normal appearing mammar\- glands are found either adjacent to or invaded by these tumors. For the details of their histological appearance the reader should turn to the section on Tumors of the Dermis, Subcutaneous and Body Wall Tissues (p. 199). Only the names and a brief description are given below. Fibromas, chondromas and osteomas.—These originate from fibrous connective tissue, cartilage and bone respectively and are uncommon in this. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Roscoe B. Jackson Memorial Laboratory; Little, Clarence C. (Clarence Cook), b. 1888; Snell, George D. (George Davis), 1903-; Dingle, John H. (John Holmes), 1908-. Philadelphia, The Blakiston company
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