biology

Maffucci syndrome

Maffucci syndrome is a biology 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 Maffucci syndrome rather than just read about it. In short: Maffucci syndrome is a very rare disorder in which multiple benign tumors of cartilage develop within the bones (such tumors are known as enchondromas). The tumors most commonly appear in the bones of the hands, feet, and limbs, causing bone deformities and short limbs.

Key takeaways

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

Reference excerpt

Maffucci syndrome is a very rare disorder in which multiple benign tumors of cartilage develop within the bones (such tumors are known as enchondromas). The tumors most commonly appear in the bones of the hands, feet, and limbs, causing bone deformities and short limbs. It is named for the Italian pathologist Angelo Maffucci who described it in 1881. Fewer than 200 cases of this syndrome have been reported.

Signs and symptoms Patients are normal at birth and the syndrome manifests during childhood. The enchondromas affect the extremities and their distribution is asymmetrical. The most common sites of enchondromas are the metacarpal bones and phalanges of the hands. The feet are less commonly affected. Disfigurations of the extremities are a result. Pathological fractures can arise in affected metaphyses and diaphyses of the long bones and are common (26%). The risk for sarcomatous degeneration of enchondromas, hemangiomas, or lymphangiomas is 15–30% in the setting of Maffucci syndrome. Maffucci syndrome is associated with a higher risk of CNS, pancreatic, and ovarian malignancies. Multiple enchondromas may present in three disorders: Ollier disease, Maffucci syndrome, and metachondromatosis. It is important to make the distinction between these diseases, particularly Ollier disease and Maffucci syndrome. Ollier disease is more common than Maffucci syndrome, and presents with multiple enchondromas often in a unilateral distribution. However, hemangiomas and lymphangiomas are not seen in Ollier disease. Metachondromatosis demonstrates autosomal-dominant transmission and presents with both multiple osteochondromas and enchondromas. It is associated with multiple cavernous hemangioma and phlebolith. Lymphangiomas may also be apparent.

Cause Maffucci syndrome is most commonly caused by mutations in the IDH1 or IDH2 gene.

Diagnosis

Differential diagnosis In Ollier's disease, isolated enchondromas are present without the presence of hemangiomas.

Management Management entails careful examination and monitoring for malignant degenerations. Surgical interventions can correct or minimize deformities.

See also Ollier disease Njolstad syndrome List of cutaneous conditions List of radiographic findings associated with cutaneous conditions

References

External links Malfucci syndrome at Genetics Home Reference Gupta N, Kabra M (February 2007). "Maffucci syndrome" (PDF). Indian Pediatr. 44 (2): 149–50. PMID 17351310.

Illustrations

Worked examples

Example 1 — a first encounter with Maffucci syndrome

Start with the simplest possible case. Write down what Maffucci syndrome claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Maffucci syndrome 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 Maffucci syndrome 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 Maffucci syndrome

In research: Maffucci syndrome appears in biology 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 Maffucci syndrome 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: Maffucci syndrome is common in secondary-school and first-year university syllabi. It links to neighbouring topics Genetic disorders with OMIM but no gene, Rare syndromes, Syndromes with tumors, so understanding it makes those chapters shorter.
In everyday life: Look for Maffucci syndrome 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 Maffucci syndrome in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Maffucci syndrome 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 Maffucci syndrome out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Maffucci syndrome in simple terms?

Why does Maffucci syndrome matter?

Because it connects several biology 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 Maffucci syndrome?

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 Maffucci syndrome.