Intraneural Lipoma of the Posterior Interosseous Nerve

Intraneural lipomatous tumor of the median nerve: Three case reports with a review of literature

“…5 To our knowledge, not so many cases have been reported in the English literature as intraneural lipomas. 2,[4][5][6][7][8][9] The intraneural lipoma tends to occur in the fourth and fifth decades and has a female predominance. Most of the intraneural lipoma occurs in the median nerve, while also reported to occur in the radial nerve, 2 sciatic nerve, 7 ulnar nerve, 8 and posterior interosseous nerve.…”

“…Cut of the nerve fibers is also reported in case they were involved in the huge intraneural lipoma. 8 On the other hand, the gold standard treatments for fibrolipomatous hamartoma of the nerve are usually conservative approaches including decompression and debulking of the fibrofatty sheath, microsurgical dissection of the neural elements and observation for asymptomatic patients. 2 In case of fibrolipomatous hamartoma associated with macrodactyly, excision of the involved nerve segment with or without nerve grafting, or amputation of the finger is recommended.…”

Intraneural Posterior Interosseous Nerve Lipoma with Complete Paralysis: Case Report and Review of the Literature

“…Lipomas of the peripheral nerves are benign, slow-growing fatty tumors composed of mature white fat cells [ 4 ]. Lipomas are most commonly extraneural, causing the compression of the peripheral nerve, although a few case reports of intraneural lipomas, including the PIN, have been described [ 5 - 6 ]. Extraneural lipomas are intramuscular [ 7 ], intermuscular [ 8 - 9 ], or parosteal [ 2 , 10 - 11 ].…”

“…Matsuo et al reported a case in which the PIN could not be preserved since the nerve fibers were significantly spread across the lipoma [ 5 ]. The patient required tendon reconstruction with a good long-term outcome of finger extension.…”

Posterior interosseous nerve discontinuity due to compression by lipoma: report of 2 cases

“…Several additional cases have been reported in the last 10 years. 2,[5][6][7]9,14,22 Typi-cally, after resection of lipomas, PIN recovery is anticipated. 1 We present 2 patients in whom the compression led to near discontinuity of the nerve; given the severity of the lesion, spontaneous recovery would not be anticipated and tendon transfers were offered early.…”