Leiomyoma

Leiomyoma
Other names	leiomyomas, leiomyomata
Uterine lipoleiomyoma, a type of leiomyoma. H&E stain.
Specialty	Oncology

A leiomyoma, also known as a fibroid, is a

The word is from leio- + myo- + -oma, 'smooth-muscle tumor'. The plural form can be either the English leiomyomas or the classical leiomyomata.

Uterus

Mesenchymal neoplasms of the gallbladder are rare and in particular leiomyomas of the gallbladder have been rarely reported, all of them in patients with immune system disorders. However, a case was reported in absence of associated immunodeficiency at Monash Hospital in Melbourne, Australia, in a healthy 39-year-old woman with no symptoms.[4]

Skin

Leiomyomas of the skin are generally (1) acquired, and (2) divided into several categories:^[5][6]

• Solitary cutaneous leiomyoma
• Multiple cutaneous (or pilar) leiomyomas arising from the arrectores pilorum muscles
• Angioleiomyomas (vascular leiomyomas) that are thought to arise from vascular smooth muscle
• Dartoic (or genital) leiomyomas originating in the dartos muscles of the genitalia, areola, and nipple
• Angiolipoleiomyoma

Esophagus, stomach and small intestines

Leiomyoma is the most common benign mesenchymal tumor of esophagus and second most common benign tumor of the small bowel (with gastrointestinal stromal tumor as most common).^[7] Although leiomyoma is the most common benign esophageal tumor, malignant carcinoma is still 50 times more likely.^[8] Approximately 50% of cases are found in the jejunum, followed by the ileum in 31% of cases. Almost one half of all lesions are less than 5 centimeters.^[9]

Other locations, metastatic leiomyoma

• Metastatic leiomyoma are an extremely rare complication after surgery to remove the uterus for uterine fibroids. The most frequent sites of occurrence are the lungs and pelvis. The lesions are hormonally responsive.^[10][11][12]
• Fibromyoma of the breast is an extremely rare benign breast neoplasm. Most reports in literature mention a history of hysterectomy for uterine fibroids, although the question of whether these fibromyomas are possibly metastases of the uterine fibroids has not been investigated. An alternative hypothesis is an origin from the smooth muscle of the nipple.
• Leiomyoma may spontaneously occur in any muscle. Depending on the location of the tumor, identification may not be timely until overall mass becomes undeniably noticeable. The symptoms for a 30-year-old male with a 10 cm leiomyoma included "dead leg" pains. Tumor was intertwined with quadriceps muscles, making identification and excision difficult. Tumor was successfully excised with only minor rehabilitation required.^[13]

Familial leiomyoma

• Associated with papillary variant of
  fumarate hydratase
  gene in the long arm of chromosome 1.

See also

• Leiomyosarcoma
• Elagolix/estradiol/norethindrone acetate

References