Intraosseous lipoma of the calcaneus

Abstract

IntroductionIntraossoeus lipoma is one of the rarest benign bone tumors [1]. Milgram [2] emphasized that the entity is not as rare as the literature suggests, because many lipomas in common sites such as proximal femur and calcaneus have been misdiagnosed as cysts or bone infarction, and have been followed by unnecessary surgical interventions.We present a patient with non-specific foot pain without any trauma. The aims of this paper are to focus attention on this rare pathology, describe various imaging features and histopathological findings, and discuss a nonsurgical treatment. Case reportA 58-year-old man presented with increasing right foot pain over the previous 4 months without any history of trauma or fever. On physical examination, the range of motion of the ankle was slightly limited in dorsal extension. Mild tenderness was present on the lateral and plantar sides of the back foot without swelling.Roentgenograms of the right back foot showed in the proximal calcaneus a well defined osteolytic lesion with no marginal sclerosis (Fig. 1). In the center, a calcified foci was present. T1-weighted magnetic resonance imaging (MRI) (Fig. 2) revealed a lesion with slightly greater intensity than that of intramedullary fat and almost isointensity to subcuta-C A S E R E P O R T Abstract Intraosseous lipoma is rare and often misdiagnosed. A patient with intraosseous lipoma in the calcaneus is presented with conventional radiography, bone scintigraphy, magnetic resonance imaging and histological findings. The intention of this work is to show the diagnostic procedure of a rare bone tumor. Despite its benign nature, the tumor is often salvaged by surgery. However, a simple observation can avoid unnecessary surgical intervention and complication.

Lipoma intracalcáneo en un jugador profesional de baloncesto

“…La paciente estuvo asintomática en todo momento y no precisó tratamiento alguno. Ince et al 13 comunican el caso de un paciente varón de 58 años de edad con una historia de 4 meses de dolor en el pie sin traumatismo previo. El diagnóstico de lipoma se confirmó mediante la radiología simple y la RM (secuencias STIR y fat sat).…”

“…De igual manera, las recurrencias y las transformaciones malignas son extremadamente raras 5,6,12,13,16 .…”