A bone island, also known as an enostosis, is a focus of compact bone located in cancellous bone (see the images below). [1, 2] This is a benign entity that is usually found incidentally on imaging studies; however, the bone island may mimic a more sinister process, such as an osteoblastic metastasis (for example, from prostate cancer). [3] Bone islands demonstrate characteristic radiographic findings. In the correct clinical context, findings on radiographs are considered diagnostic. However, if the lesion is large or demonstrates increased scintigraphic activity, or if the patient is symptomatic or has a history of malignancy, clinical follow-up and/or biopsy may be warranted.
https://emedicine.medscape.com/article/387758-overview?pa=Ty...

enostosis
a morbid bony growth within a bone cavity or on the internal surface of the bone cortex.
https://medical-dictionary.thefreedictionary.com/enostosis


SCLEROTIC LESIONS

Bone Island (Enostosis)

The terms bone island or enostosis may be used interchangeably to describe the same lesion, namely, a localized area of compact bone within the medullary cavity of a bone. The area may be encompassed by the medullary cavity or show focal attachment to the inner cortex of the host bone. Bone islands are characteristically asymptomatic and usually discovered incidentally. They develop after puberty and may undergo prolonged growth. They are most common in the pelvis, proximal femora, and ribs. In tubular bones, they are most common in the epiphysis. (50) Not all bone islands are stable. Some, after a period of growth, may decrease in size and disappear. (51) Others may increase in size and concentrate radionuclide on bone scans.

https://www.thefreelibrary.com/Nonneoplastic lesions that si...

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Note added at 17 mins (2018-06-16 13:42:58 GMT)
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An enostosis or bone island is a small area of compact bone within the cancellous bone.[1][2] They are commonly seen as an incidental finding on radiographs or CT scans. They are typically very small and do not cause any symptoms.[3] Their radiodensity is generally similar to cortical bone.[4] No treatment is necessary. Multiple enostoses are present in osteopoikilosis

https://en.wikipedia.org/wiki/Enostosis


I think you can safely use either "bone island" or "enostosis" and forget about "de compacto" because it forms part of the definition of a "bone island".