Clínica do Joelho e Ombro - Prof. Gutierres - Médicos e Ortopedia

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Meralgia paresthetica due to a thigh hibernoma: a rare diagnosis—case report
European Orthopaedics Traumatology, 2013

Meralgia paresthetica (MP) is a symptom complex that includes numbness, paresthesias, and neuropathic pain in the anterolateral cutaneous thigh and may be the result of an entrapment neuropathy or a neuroma of the lateral femoral cutaneous nerve (LFCN). The condition can be differentiated from other neurologic disorders by the typical exacerbating factors, the characteristic distribution of symptoms, and the use of electrodiagnostic studies like the electromyography (EMG) [1].

MP can develop spontaneously at any age, and the disease usually presents in the 30- to 40-year-old age group with an higher incidence than previously reported [2, 3].

Meralgia paresthetica can have many etiologies and can be subdivided into two main groups: spontaneous onset and iatrogenic. Spontaneous MP occurs without previous surgical intervention and can be subdivided into an idiopathic, metabolic, and/or mechanical type [4, 5].

Hibernoma is an unusual benign soft tissue tumor derived from a specialized form of brown fat [6].

Hibernomas have computed tomography and magnetic resonance imaging appearances similar to other fibrous and lipomatous tumors; therefore, histopathological analysis is always necessary for a correct diagnosis [7].

Although these tumors are always benign, they tend to grow to large sizes, sometimes causing compression of the neighboring structures, so that surgical excision is always recommended.