Angioleiomyoma in the posterior knee: A case report and literature review

Abstract

The authors present a case of angioleiomyoma situated in the posterior knee. A 47-year-old Caucasian woman presented in 2011 with recurrent stabbing pain on the lateral aspect of her right knee. She reported having pain for the last 6years. She had no history of trauma. In 2008 she was treated with a diagnostic arthroscopy and transposition of the tibial tuberosity, with no benefit to her symptoms. Electromyography of the lower limbs showed asymmetry of the amplitude of sensitive action potential of the superficial fibular nerve. Based on the clinical suspicion of entrapment of the common fibular nerve at its bifurcation, a surgical exploration was performed, but pain persisted. In 2014, ultrasonography localized at the trigger point showed a solid ovular formation of 1cm in diameter situated on the posterior aspect of the external femoral condyle in proximity to the joint capsule, which was confirmed by magnetic resonance imaging (MRI). Surgical excision of the 1-cm diameter tumor mass relieved the symptoms immediately and permanently. Histology evidenced the presence of a solid-type angioleiomyoma. The presence of an angioleiomyoma at the knee joint is very rare and few cases are reported in the literature. To the authors' knowledge this is the first time an angioleiomyoma in the posterior knee has been described. In case of unexplained and persistent pain in and around the knee, clinicians should be aware of the atypical locations of this tumor, considering that its surgical excision alone may relieve symptoms permanently.

Laparoscopic removal of rare variant of leiomyoma in the female inguinal canal: a report of two cases

“…Angioleiomyomas and lipoleiomyomas in the inguinal canal are rarely reported, and the swelling and presenting symptoms of our patients were initially attributed to an inguinal hernia. Distinguishing a lipoma in the canal of Nuck from an inguinal hernia is not easy using ultrasonography because they both show a homogenous structure with a well-defined margin [7]. Avritscher et al [8] suggested that the tumor may arise from misplaced embryonic remains of lipoblasts or due to the perivascular extension of peritoneal or retroperitoneal fat.…”

Testen Sie Ihr Fachwissen

“…Allerdings sind die Schmerzen sehr unterschiedlich ausgeprägt, oft nur nach Irritationen (Tuberculum dolorosum). Aber der Schmerz kann auch konstant auftreten, paroxysmal, scharf-stechend oder getriggert (Druck, Östrogene, Kälte u. a) [5]. Auch die Genese der Schmerzen ist unklar.…”

Lateral Femoral Cutaneous Nerve Angiomyoma

“…Angiomyomas similarly involve nerves of the lower extremities and have been reported in the sciatic nerve [ 12 ]. By and large, angiomyomas have a predilection for affecting females in the lower extremities [ 13 ], and in particular, involving the knee [ 14 - 15 ]. Involvement in the plantar aspect of the heel has also been described [ 16 ].…”