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Case Reports
, 12 (3), 351-4

Subdeltoid Lipoma Causing Shoulder Impingement Syndrome - A Case Report

[Article in English, Portuguese]
Case Reports

Subdeltoid Lipoma Causing Shoulder Impingement Syndrome - A Case Report

[Article in English, Portuguese]
Mario Lenza et al. Einstein (Sao Paulo).


The impingement syndrome is defined by the compression of the rotator cuff tendons against the coracoacromial arch. Several factors contribute to this condition and they are classified as structural or functional factors. The former are changes in the coracoacromial arch, proximal humerus, bursa and rotator cuff, and the latter are related to the mechanism of the upper limb by means of synchronized activity and balanced between the rotator cuff and scapular girdle muscles. The authors report here a case of parosteal lipoma of the proximal humerus, located between the muscles deltoid, teres minor and infraspinatus causing clinical signs of impingement. It is a rare occurrence, characterized as a structural cause for the onset of this symptom.


Figure 1
Figure 1. . (A) Sagittal view showing subdeltoid lipoma not invading the subacromial space and tapering of the supraspinatus tendon (arrow). (B) Axial view showing the lipoma between the teres minor (narrow arrow) and deltoid (wide arrow) muscles
Figure 2
Figure 2. . (A) Intraoperative image demonstrating that the lipoma (narrow arrow) does not invade the subacromial space (wide arrow). (B) Lipoma adhering to the humerus, anteriorly to teres minor tendon (narrow arrow) and infraspinatus (wide arrow) muscles
Figure 3
Figure 3. . (A) Image of the surgical specimen. (B) Photomicrograph of the histological section of the lipoma (hematoxylin and eosin, 200x)
Figura 1
Figura 1. (A) Corte sagital mostra lipoma subdeltoide, que não invade o espaço subacromial, e redução do tendão do supraespinhoso (seta). (B) Lipoma entre os músculos redondo menor (seta estreita) e deltoide (seta larga)
Figura 2
Figura 2. (A) Imagem intraoperatória mostra que o lipoma (seta estreita) não invade o espaço subacromial (seta larga). (B) Lipoma aderindo ao úmero, anteriormente ao tendão dos músculos redondo menor (seta estreita) e infraespinhoso (seta larga)
Figura 3
Figura 3. (A) Imagem do espécime cirúrgico. (B) Fotomicrografia do corte histológico do lipoma (hematoxilina e eosina, 200x)

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    1. Hogendoorn PC, Collin F, Daugaard S, Dei Tos AP, Fisher C, Schneider U, Sciot R, Pathology and Biology Subcommittee of the EORTC Soft Tissue and Bone Sarcoma Group Changing concepts in the pathological basis of soft tissue and bone sarcoma treatment. Eur J Cancer. 2004;40(11):1644–1654. Review. - PubMed
    1. Carnesale PG. Canale ST. Campbell’s. Operative Orthopaedics. 10. New York: Mosby; 2003. Soft tissue tumors and nonneoplastic conditions simulating bone tumors; pp. 859–969.
    1. Enzinger FM, Weiss SW. Benign lipomatous tumors. In: Enzinger FM, Weiss SW, editors. Soft tissue tumors. 3. St Louis: Mosby; 1995. pp. 381–430.
    1. Jaffe HL. Jaffe HL. Tumores y estados tumorales oseos y articulares. México: La Prensa Médica Mexicana; 1966. Tumores del tejido adiposo; pp. 516–518.
    1. Kransdorf MJ. Benign soft-tissue tumors in a large referral population: distribution of specific diagnoses by age, sex, and location. AJR Am J Roentgenol. 1995;164(2):395–402. - PubMed

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