Lipomas can be found anywhere in the body, with the majority being located in the head and neck region, as well as the back and abdomen. Lipomas are one of the most common benign, mesenchymal neoplasms. They may progress in size overtime and they may or may not be painful. They may be superficial or deep. Deep soft-tissue lipomas of the hand are rare. Among them, thenar intramuscular lipomas are very rare. We are reporting case of thenar intramuscular lipoma.
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CASE REPoRTA 45-year-old male laborer presented to our clinic with a complaint of right hand mass. He first noticed the mass 8 months prior to his clinical evaluation and it had progressed in size overtime. The patient reported mild discomfort in the area, especially when he would try to grip tools. Other than discomfort during grip, the patient stated that he had full hand function. On physical examination, a mass was noted over the thenar eminence. This area was nontender and a soft, mobile mass was easily appreciated with palpation of the palm. The surrounding skin was normal. There was no neurovascular compromise in the thumb or other digits, and grip strength was normal. An ultrasound of the hand showed a relatively well-defined hyperechoic mass approximately 2 cm³.Excision of the lesion was performed under regional anesthesia. Intraoperatively, the thenar muscles were noted to be bulging above the mass (Fig. 1). They were separated, and the mass was excised completely. The mass measured 2 cm³ (Figs 2A and B). Histology was consistent with a spindle cell lipoma, with no evidence of atypia.