Search Article 
  
 Advanced search 
  
 
About us - Editorial board - Browse articles - Submit article - Instructions - Subscribe - Advertise - Contacts - Login 
  Users Online: 192 Home Print this page Email this page Small font sizeDefault font sizeIncrease font size   



 
Browse articles
CASE REPORT
J Clin Imaging Sci 2017,  7:26

Uterine Lipoleiomyoma: A Report of Two Cases


Department of Radiodiagnosis, Saveetha Medical College and Hospital, Chennai, Tamil Nadu, India

Date of Submission09-Feb-2017
Date of Acceptance06-May-2017
Date of Web Publication28-Jun-2017

Correspondence Address:
Haji Mohammed Nazir
Flat No - 226, Alsa Townsville, 38/170, Arcot Road, Valasravakkam, Chennai, Tamil Nadu
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jcis.JCIS_13_17

Rights and Permissions
   Abstract 

We report two cases of uterine lipoleiomyoma in postmenopausal women of ages 52 and 55 years, who presented with complaints of leukorrhea and lower abdominal pain, respectively. Lipoleiomyoma is a rare benign variant of leiomyoma, having an incidence of 0.03%–0.2%. These are benign pelvic tumors which are usually asymptomatic and commonly occur in obese postmenopausal women. However, they can occasionally present with typical leiomyoma symptoms. Imaging plays a crucial role in the diagnosis of benign pelvic tumors. Ultrasonography is the first imaging modality for diagnosis of pelvic tumors in females. Computed tomography and magnetic resonance imaging are specific in demonstrating the uterine origin and fat component.

Keywords: Benign, leiomyoma, lipoleiomyoma, postmenopausal, uterine


How to cite this article:
Nazir HM, Mehta S, Seena C R, Kulasekaran N. Uterine Lipoleiomyoma: A Report of Two Cases. J Clin Imaging Sci 2017;7:26

How to cite this URL:
Nazir HM, Mehta S, Seena C R, Kulasekaran N. Uterine Lipoleiomyoma: A Report of Two Cases. J Clin Imaging Sci [serial online] 2017 [cited 2017 Sep 25];7:26. Available from: http://www.clinicalimagingscience.org/text.asp?2017/7/1/26/209092


   Introduction Top


Leiomyomas or fibroids are commonly seen tumors of the uterus that originate from the smooth muscle layer of the uterine wall, with a high incidence rate in the reproductive age group.[1] Lipoleiomyomas are benign variants of leiomyomas occurring due to the fatty metamorphogenesis of their smooth muscle cells.[2],[3],[4],[5] These lipoleiomyomas are composed of variable amounts of adipocytes and smooth muscle cells, separated by thin fibrous tissue. Other lipoid tumors of the uterus include pure lipomas and fibrolipomyoma. Improved understanding and imaging diagnosis of the tumor can prevent unnecessary invasive procedures.


   Case Reports Top


Case 1

A 52-year-old postmenopausal multiparous woman presented with complaints of leukorrhea for 2 months. There was no history of bleeding per vaginum, abdominal distension, abdominal pain, or fever. She had attained menopause 7 years prior and had no known comorbid conditions, no previous history of any surgeries or any significant family history.

On physical examination, her vitals were stable. Abdominal examination revealed a firm, nontender mass of 15 weeks size in the left lower quadrant. Routine hematological investigations were within normal limits.

Ultrasonography (USG) was done for the patient transabdominally and transvaginally. Upper abdomen revealed fatty liver and no other significant abnormality. Pelvic and transvaginal USG showed an enlarged uterus of size 17.6 cm × 10.9 cm × 11.6 cm with a large, well-defined, uniformly hyperechoic lesion of size ~11.4 cm × 10.6 cm × 8.8 cm in the uterine fundus myometrium with minimal peripheral vascularity. No evidence of calcification was noted within [Figure 1].
Figure 1: A 52-year-old female presenting with leukorrhea for 2 months. Longitudinal ultrasound images of the pelvis demonstrate a large echogenic mass in the fundus of the uterus.

Click here to view


Computed tomography (CT) showed an enlarged uterus with a well-circumcised predominantly fat-containing lesion with regular margins arising from the uterine fundus. No evidence of calcification was noted within [Figure 2].
Figure 2: A 52-year-old female presenting with leukorrhea for 2 months. Computed tomography plain axial section of the pelvis demonstrates a predominantly low attenuation mass, corresponding to fat density in the fundus of the uterus.

Click here to view


Her further work up by magnetic resonance imaging (MRI) showed an enlarged uterus with a well-marginated mass of size 11.5 cm × 10.5 cm × 9 cm within the uterine fundus subserosal myometrium, predominantly hyperintense on T1 and T2 and hypointense on T2 fat suppression sequences [Figure 3], consistent with a diagnosis of lipoleiomyoma.
Figure 3: A 52-year-old female presenting with leukorrhea for 2 months. (a) Magnetic resonance imaging T1-weighted image axial section of the pelvis demonstrates a large T1 hyperintense mass in the uterine fundus subserosal myometrium. (b) Magnetic resonance imaging T2 fat suppression sequence axial section of the pelvis demonstrates a predominantly hypointense mass in the uterine fundus subserosal myometrium. (c) Magnetic resonance imaging T2-weighted image sagittal section of the pelvis demonstrates a large T2 hyperintense mass in the uterine fundus subserosal myometrium.

Click here to view


In view of large lipoleiomyoma, surgery was advised, but the patient opted for conservative treatment with follow-up imaging.

Case 2

A 55-year-old postmenopausal woman presented with complaints of lower abdominal distension for 6 months. There was no history of discharge per vaginum, abdominal pain, or fever.

On physical examination, her vitals were stable. Abdominal examination revealed a firm, nontender mass of 12 weeks size in the right lower quadrant. Routine hematological investigations were within normal limits.

Ultrasound was done in another institute which revealed enlarged uterus with a large echogenic mass in uterine fundus. The patient was referred to our institute for further evaluation of the uterine mass. CT plain and contrast abdomen was done which showed an enlarged uterus of size 13.2 cm × 7.7 cm × 7.3 cm with a large, predominantly fat density mass lesion of size 6.3 cm × 6.1 cm × 6.3 cm in the myometrium of the uterine fundus with nonenhancing soft tissue strands noted within [Figure 4]. Both ovaries were atrophied.
Figure 4: A 55-year-old female presenting with lower abdominal distension for 6 months. (a) Computed tomography plain axial section of pelvis demonstrates a predominantly low attenuation mass, corresponding to fat density in the uterine fundus. (b) Computed tomography contrast axial image of pelvis demonstrates a predominantly low attenuation mass, corresponding to fat density in the myometrium of the uterine fundus with few nonenhancing soft tissue strands noted within. (c) Computed tomography contrast sagittal image of the pelvis demonstrates a predominantly low attenuation mass, corresponding to fat density in the myometrium of the uterine fundus with few nonenhancing soft tissue strands noted within.

Click here to view


Based on the CT findings of predominantly fatty component with some areas of soft tissue density, diagnosis of lipoleiomyoma was made.

Since the patient was asymptomatic, except for abdominal distention, she was managed conservatively with follow-up imaging.


   Discussion Top


Lipomatous tumors of the uterus can be classified into three types:

  • Pure lipomas – composed of encapsulated mature fat cells
  • Lipomas with mesodermal components
    • Lipoleiomyoma
    • Angiomyolipoma
    • Fibromyolipoma
  • Liposarcoma – the exceedingly rare and malignant type.[6]


Uterine lipoleiomyomas are rare benign tumors, having an incidence of about 0.03%–0.2%.[1],[3],[5],[6],[7],[8],[9],[10] They are said to be subsets of leiomyomas with fatty metamorphosis of smooth muscle cells into adipose tissue.[11],[2],[3],[4],[5] Other theories suggest that these tumors may arise due to misplaced remnants of fatty cells of the embryo, due to the extension of retroperitoneal or peritoneal fat perivascularly, due to fatty infiltration of the connective tissue, or due to the transformation of mesenchymal totipotent cell.[3],[12] Studies show that an increased estrogenic state may also be a contributing factor. Hence, alteration in the lipid metabolism with menopause may have a role in its development. Furthermore, these patients commonly suffer from metabolic disorders such as hypothyroidism, hyperlipidemia, and diabetes mellitus.[6],[7]

They are often seen in postmenopausal women [6],[7],[9],[13] who remain either asymptomatic or present with symptoms similar to those of uterine leiomyomas such as bleeding per vaginum, abdominal pain, palpable abdominal mass, increased frequency of urine, and urinary incontinence. They present usually as solitary enlarged masses of varying sizes with the common site of occurrence in the corpus of the uterus; however, they have also been known to occur in the cervix, broad ligament, retroperitoneum, and ovary.[14]

Imaging by USG commonly shows a well-defined hyperechoic mass surrounded by a hypoechoic rim, which may suggest a strip of myometrium around the fatty component. Vascularity is often poor.[6],[7]

CT usually shows a well-marginated, dense mass with predominantly fatty component.[6],[7],[9]

MRI is the imaging modality of choice and shows a well-circumcised mass which is hyperintense on T1 with a peripheral hypointense rim. It also appears hyperintense on T2. Confirmation can be done by fat suppression sequence which shows a hypointense mass.[6],[7],[15]

Chemical shift imaging, based on the innate differences in the inherent magnetic field experienced by the protons in fat molecules compared with those in water molecules, can also be used for confirmation of fat. Using Dixon method of chemical shift imaging, fat-only image is acquired showing hyperintense fatty component.[16]

Differential diagnosis of lipoid pelvic tumors can be benign ovarian teratoma, benign pelvic lipoma, fatty lymphadenopathy, degeneration of leiomyoma, retroperitoneal cystic hamartoma, and well-differentiated liposarcoma.[6],[7],[9],[14] Among the differentials, the most common one is benign cystic ovarian teratoma, which requires surgical excision.

Asymptomatic uterine lipoleiomyoma, due to its benign nature, can be managed conservatively. Hence, accurate diagnosis of lipoma/lipoleiomyoma of the uterus and their differentiation from various other fat-containing pelvic tumors are important in the management of the patient and can prevent unnecessary surgical excision.[17] Treatment of a lipoleiomyoma generally depends on the symptoms the patient presents with and the size of the mass. In symptomatic patients with large masses, the symptoms are resolved by medical management with painkillers and hormone regulation pills. Surgical options include myomectomy, hysterectomy, myolysis, tumor embolization, and radiofrequency ablation.


   Conclusion Top


Uterine lipoleiomyomas may symptomatically present as leiomyomas and can be difficult to differentiate if found extrauterine on imaging.

Fatty component of lipoleiomyomas is more specific on CT and MRI when compared to USG. MRI, with its multiplanar capabilities, high sensitivity, and specificity to fat and tissue characterization, is the modality of choice for confirmation of diagnosis.

Thus, awareness of lipoleiomyoma, its clinical presentation, and imaging features is important to avoid unnecessary surgeries as it has an excellent prognosis, especially when asymptomatic.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

 
   References Top

1.
Ishigami K, Yoshimitsu K, Honda H, Kaneko K, Kuroiwa T, Irie H, et al. Uterine lipoleiomyoma: MRI appearances. Abdom Imaging 1998;23:214-6.  Back to cited text no. 1
    
2.
Aung T, Goto M, Nomoto M, Kitajima S, Douchi T, Yoshinaga M, et al. Uterine lipoleiomyoma: A histopathological review of 17 cases. Pathol Int 2004;54:751-8.  Back to cited text no. 2
    
3.
Avritscher R, Iyer RB, Ro J, Whitman G. Lipoleiomyoma of the uterus. AJR Am J Roentgenol 2001;177:856.  Back to cited text no. 3
    
4.
Resta L, Maiorano E, Piscitelli D, Botticella MA. Lipomatous tumors of the uterus. Clinico-pathological features of 10 cases with immunocytochemical study of histogenesis. Pathol Res Pract 1994;190:378-83.  Back to cited text no. 4
    
5.
Bindra R, Sharma N. Uterine lipoleiomyoma. Int J Gynaecol Obstet 2010;12:2.  Back to cited text no. 5
    
6.
Nayal B, Somal PK, Rao AC, Kumar P. Uterine lipoleiomyoma: A case report of a rare entity. Int J Appl Basic Med Res 2016;6:134-6.  Back to cited text no. 6
    
7.
Krenning RA, De Goey WB. Uterine lipomas. Review of the literature. Clin Exp Obstet Gynecol 1983;10:91-4.  Back to cited text no. 7
    
8.
Chu CY, Tang YK, Chan TS, Wan YH, Fung KH. Diagnostic challenge of lipomatous uterine tumors in three patients. World J Radiol 2012;4:58-62.  Back to cited text no. 8
    
9.
Chawla A, Rathod K, Raut A, Garg A, Thakker A, Telkar H, et al. Uterine lipoleiomyoma: Radiological case of the month. Medscape 2004;33.  Back to cited text no. 9
    
10.
Prieto A, Crespo C, Pardo A, Docal I, Calzada J, Alonso P. Uterine lipoleiomyomas: US and CT findings. Abdom Imaging 2000;25:655-7.  Back to cited text no. 10
    
11.
Tsushima Y, Kita T, Yamamoto K. Uterine lipoleiomyoma: MRI, CT and ultrasonographic findings. Br J Radiol 1997;70:1068-70.  Back to cited text no. 11
    
12.
Akbulut M, Gündogan M, Yörükoglu A. Clinical and pathological features of lipoleiomyoma of the uterine corpus: A review of 76 cases. Balkan Med J 2014;31:224-9.  Back to cited text no. 12
    
13.
Oppenheimer DA, Carroll BA, Young SW. Lipoleiomyoma of the uterus. J Comput Assist Tomogr 1982;6:640-2.  Back to cited text no. 13
    
14.
Kumar S, Garg S, Rana P, Hasija S, Prakash SK, Sen R. Lipoleiomyoma of uterus: Uncommon incidental finding. Gynecol Obstet 2013;3:145.  Back to cited text no. 14
    
15.
Aizenstein R, Wilbur AC, Aizenstein S. CT and MRI of uterine lipoleiomyoma. Gynecol Oncol 1991;40:274-6.  Back to cited text no. 15
    
16.
Kitajima K, Kaji Y, Imanaka K, Sugihara R, Sugimura K. MRI findings of uterine lipoleiomyoma correlated with pathologic findings. AJR Am J Roentgenol 2007;189:W100-4.  Back to cited text no. 16
    
17.
Dodd GD 3rd, Budzik RF Jr. Lipomatous uterine tumors: Diagnosis by ultrasound, CT, and MR. J Comput Assist Tomogr 1990;14:629-32.  Back to cited text no. 17
    

 
   Authors Top

Haji Mohammed Nazir



    Figures

  [Figure 1], [Figure 2], [Figure 3], [Figure 4]



 

Top
Previous article   Next article
 
  Search
 
    Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
    Access Statistics
    Email Alert *
    Add to My List *
* Registration required (free)  

 
  In this article
    Abstract
   Introduction
   Case Reports
   Discussion
   Conclusion
    References
    Authors
    Article Figures

 Article Access Statistics
    Viewed452    
    Printed7    
    Emailed0    
    PDF Downloaded54    
    Comments [Add]    

Recommend this journal