Tumoural Calcinosis

Tumoral calcinosis-like lesion of the proximal linea aspera

“…A number of cases of underlying bone involvement have, however, been reported [13,36,44]. In our series of six patients, all lesions were adherent to the underlying bone, and CT scan revealed the presence of superficial cortical erosion in five, a highly unusual and rarely reported feature of classic tumoral calcinosis.…”

“…An apparent inherited disorder of phosphate and vitamin D metabolism has also been described [8,19,28,34,37,38,48]. Trauma has been implicated as a cause in selected patients [5,10,15,30,36,39,42,44]. Although surgical specimens of the patients reported here revealed findings typical of tumoral calcinosis, the patients' age and race are atypical, and the lesions were solitary, unusually small, and in an atypical location.…”

“…In general, tumoral calcinosis lesions do not invade the cortex of the underlying normal bone [4,6,16,21,23,29,36,38]. A number of cases of underlying bone involvement have, however, been reported [13,36,44].…”

“…These foci are usually found in the vicinity of large joints but do not involve the synovium itself [4, 6, 16, 23, 30-32, 36, 38]. It has also been reported that the lesions do not involve adjacent bone [4,6,16,21,23,29,36,38]. Although a metabolic etiology has been proposed, some authors feel that the condition may occasionally be related to trauma [5,10,15,30,36,39,42,44].…”

Extraskeletal Osteochondroma in the Nape of the Neck: A Case Report

“…Other non-malignant e n t i t i e s i n c l u d i n g l i p o m a t o u s l e s i o n s , psuedomalignant osseous tumours, and ossifying fibromyxoid tumours of soft tissue may be associated with calcification or ossification, [11][12][13][14] but these lesions c a n b e d i ff e r e n t i a t e d f r o m e x t r a s k e l e t a l osteochondromas on clinical and histopathological examination. Tumoural calcinosis usually appears as well-defined lobulated calcified masses with layering when imaged with a horizontal beam, 6,10,15 but there are no osseous trabecular structures in the masses unlike soft-tissue osteochondroma. Extraskeletal chondroma with endochondral ossification can be excluded in the absence of chondrogenic or chondroblastic differentiation of the inner part of the mass and the distinct cartilage cap with fibrous capsule.…”