Massive periostosis in a child from Neolithic Gebel es-Silsileh, Egypt.

In 2015 a surprising find of human bone fragments from a child was made in a collection of the Egyptian Museum and Papyrus Collection, Berlin. These bone fragments from Southern Egypt date to 3400-3300 BC and represent the distal parts of both femora and the proximal parts of both tibiae (bones around the knee joint). The bones have a specific appearance, probably indicating a systemic disease. Due to the incomplete state of the skeletal remains, the distribution of the lesions throughout the entire skeleton could not be observed, thus preventing a better diagnosis of the underlying pathological process. The poor collagen preservation of the bone precluded aDNA testing for pathogens. The bone fragments were instead subjected to radiographic and microscopic analysis which revealed a recurrent periosteal process accompanied by a distinct osteoclastic component. A possible diagnosis might be an underlying unknown pathological process, leading to the development of a secondary Hypertrophic Osteoarthropathy (HOA).