science

Uterus-like mass

Uterus-like mass is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Uterus-like mass rather than just read about it. In short: The uterus-like mass (ULM) is a tumorlike anatomical entity originally described in the ovary in 1981 and thereafter reported in several locations of the pelvis and abdominal cavity including broad ligament, greater omentum, cervix, small intestine, mesentery and conus medullaris. Basically, it is represented by a miniature uterus comprising a smooth muscle wall lined by endometrium thus outlining a uterus anatomica…

Key takeaways

Uterus-like mass belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Uterus-like mass to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Uterus-like mass from memory before moving on to harder problems.

Reference excerpt

The uterus-like mass (ULM) is a tumorlike anatomical entity originally described in the ovary in 1981 and thereafter reported in several locations of the pelvis and abdominal cavity including broad ligament, greater omentum, cervix, small intestine, mesentery and conus medullaris. Basically, it is represented by a miniature uterus comprising a smooth muscle wall lined by endometrium thus outlining a uterus anatomical structure. Some of the reported cases have been associated to urinary tract and internal genitalia malformations whereas others appeared as a solitary finding. The term endomyometriosis has also been applied to this lesion. Different pathogenetic views have been suggested for this anomaly: a) a metaplastic change in endometriosis foci bringing about smooth muscle hyperplasia; b) a congenital anomaly due to fusion defects of the Müllerian ducts; and c) a sub-coelomic transformation of the mesenchyme. ULM has also been reported associated to endometrial carcinoma and breast cancer. A clonal chromosome deletion 2p21 was found in endomyometriosis by Verhest et al. while Pai evidenced a strict relationship among ULM, breast cancer and elevated serum CA125 supporting the view of ULM being either hormone-dependent or a form of endometriosis. There have been reports of the finding of occurrence of endometriosis in leiomyomatosis peritonealis disseminata. More than 15 cases of ULM have been reported so far. A case of ULM was reported 22 years after total hysterectomy, another 17 years after. Abdominal pain and a palpable mass are among the main clinical findings. Anyway, the phenomenon of smooth muscle cell metaplasia occurring in association with endometriosis (endomyometriosis), as well as of smooth muscle differentiation at endometrio-myometrial junction independently from actually engendering uterus-like configurations in several locations of the pelvis, have been pointed out by several authors. A magnetic resonance account of this lesion type has been provided by Menn et al.

Sources

Further reading Kaeser SA, Ruchti C, Frankhauser G (2008). Uterus-like mass in the great omentum. Geb Frauenh 68(1):88-90. Kaufman Y; Lam A (2008). "The pelvic uterus-like mass - A primary or secondary Muellerian system anomaly?". Journal of Minimally Invasive Gynecology. 15 (4): 494–497. doi:10.1016/j.jmig.2008.03.002. PMID 18602050. Khurana A, Mehta A, Sardana M (2011). Extrauterine adenomyoma with uterus-like features. A rare entity presenting 17 years post hysterectomy. Indian J Pathol Microbiol 54:572-573. Peterson CJ, Strickler JG, Gonzalez R, Dehner LP (1990). Uterus-like mass of the small intestine. Heterotopia or monodermal teratoma? Am J Surg Pathol 14(4):390-394. Pueblitz-Peredo S, Luévano-Flores E, Rincòn-Taracena R, Ochoa-Carrillo FJ (1985). Uterus-like mass of the ovary: endometriosis or congenital malformation? A case with discussion of histogenesis. Arch Pathol Lab Med 109:361-364. Rahilly MA, Al-Nafussi A (1991). Uterus-like mass of the ovary associated with endometrioid carcinoma. Histopathology 18:549-551. Redman R, Wilkinson EJ, Massoll NA (2005). Uterine-like mass with features of an extrauterine adenomyoma presenting 22 years after total abdominal hysterectomy - bilateral salpingo-oophorectomy: A case report and review of the literature. Arch Pathol Lab Med 129(8):1041-1043.

Worked examples

Example 1 — a first encounter with Uterus-like mass

Start with the simplest possible case. Write down what Uterus-like mass claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Uterus-like mass before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Uterus-like mass ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Uterus-like mass

In research: Uterus-like mass appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Uterus-like mass in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Uterus-like mass is common in secondary-school and first-year university syllabi. It links to neighbouring topics Uterus, so understanding it makes those chapters shorter.
In everyday life: Look for Uterus-like mass outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Uterus-like mass in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Uterus-like mass means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Uterus-like mass out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Uterus-like mass in simple terms?

Why does Uterus-like mass matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Uterus-like mass?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Uterus-like mass.