VIII. TUMORS AND CYSTS

A tumor is a mass, swelling, or enlargement. It may be benign or malignant. Nothing was found at Crow Creek resembling the effect of a malignant tumor (cancer) in or upon bone.

Benign tumors and cyst-like masses were present.

A. BENIGN TUMORS

LIX. In the external ear canal of the left temporal bone there is a single linear exostosis. It is composed of dense bone, and is a benign tumor.

LXXXVII. The proximal clavicle is the site of a cyst like, space occupying lesion, an enchondroma. Although the lesion appears cavitary, it very likely was filled with soft tissue during life. It is a benign tumor.

LXXXIXa.. Projecting from the proximal portion of the anterior lateral surface of the humerus is a tumor composed of cancellous bone, an osteochondroma. LXXXIXb. Enlargen view. It is benign, and becomes less prominent with age. It is one of the most common of bony tumors.

LXXXIXc. A radiograph of the lesion.

CVII. On the lateral surface of the parietal bone there is a a slightly raised round lesion. It is composed to dense bone. Referred to as a button osteoma, it is benign.

CLIX. Protruding from the anterior-superior margin of the left external auditory canal is a spicular exostosis. There are several tiny knobby exostoses attached to the floor of the external canal. These are benign lesions.

CLXXXIX. On the outer surface of the frontal bone, left side, is a button osteoma measuring about 3 mm in diameter. This is benign. Superior to and slightly medial to the exostosis is an area of porotic hyperostosis. (refer to metabolic and nutritional processes) Anterior to the porotic hyperostosis are fine cut marks made during the process of scalp evulsion.

CCLXXVIII. On the surface of the distal fibula there is a cystic lesion about four mm in diameter. This appears benign, and probably contained soft tissue during life.

CCXCII. In the spot occupied by the biceps tuberosity of the proximal radius, there is a cavitary lesion, which may represent a cyst. The surrounding bone is gone, being replaced with soft tissue. This lesion appears benign.

CCCXIII A. The distal tibia is distorted by expanding trabeculated bone in the medullary space, causing thinning and resorption of the cortex.

CCCXIII B. The medullary architecture is replaced by evenly spaced fibrous trabeculae that form a retiform pattern. Small knob like excrescenses are on the surface. Structurally the tumor is stable throughout, and appears benign. CCCXIII C. A radiograph of the tumor. This was diagnosed "fibrous dysplasia" by Lent Johnson, Armed Forces Institute of Pathology, in a personal commun cation, 1979.

CCCLXI. On the lateral surface of the left temporal bone, superior and posterior to the auditory canal is a button osteoma which measures 4 x 3 x 3 mm.

[22] In the innominate bone there was a cystic lesion which was 7 x 5 x 4 mm. No other similar defects were in the skeleton, and the lesion appeared benign.

[27] In the lateral margin of the right orbit there was a tiny cystic lesion. It was a solitary finding and appeared benign.

[30] In the rim of the glenoid cavity of the scapula there was a small cystic space which was about 4 mm in diameter. It appeared benign, and most likely was filled with soft tissue during life.

[42] In the supraglabellar area of this skull there was a shallow indented area in the frontal cortex, measuring about 4 x 4 x 3 mm. It appeared to have been cystic, but none of the cyst contents remained, and the lesion appeared benign. An incidental finding are the vermiculate patterns over the frontal sinuses.

[75] On the anterior surface of a tibia is a benign button osteoma.

[83] On the surface of the left fibula there is an unusual hole penetrating the bone. The surface of the lesion is mildly scalloped at the lesion's edge for a distance of about 5mm. This is probably an anomalous nutrient foramen.

[93] A navicular bone has a cystic lesion measuring 20 x 12 x 10 mm. A large portion of the bone's architecture is lost due to the lesion. In the depths of the lesion bony trabeculae are visible. This appears benign.

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