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Spheroid body myopathy

MedGen UID:
401082
Concept ID:
C1866785
Disease or Syndrome
Synonym: Autosomal dominant spheroid body myopathy
SNOMED CT: Spheroid body myopathy (765092004)
 
OMIM®: 182920; 604103

Definition

A rare form of myofibrillar myopathy characterised by predominantly proximal muscle weakness (that could be either non or slowly progressive), associated with spheroid body inclusions (composed of myofilament material within individual muscle fibres) in skeletal muscle biopsy. Presentation is varied and may range from asymptomatic to severe muscle weakness that manifests with absent Achilles reflexes, gait abnormality and/or other motor incapacitations. [from SNOMEDCT_US]

Clinical features

From HPO
Absent Achilles reflex
MedGen UID:
108240
Concept ID:
C0558845
Finding
Absence of the Achilles reflex (also known as the ankle jerk reflex), which can normally be elicited by tapping the tendon is tapped while the foot is dorsiflexed.
Dysphagia
MedGen UID:
41440
Concept ID:
C0011168
Disease or Syndrome
Difficulty in swallowing.
Tremor
MedGen UID:
21635
Concept ID:
C0040822
Sign or Symptom
An unintentional, oscillating to-and-fro muscle movement about a joint axis.
Waddling gait
MedGen UID:
66667
Concept ID:
C0231712
Finding
Weakness of the hip girdle and upper thigh muscles, for instance in myopathies, leads to an instability of the pelvis on standing and walking. If the muscles extending the hip joint are affected, the posture in that joint becomes flexed and lumbar lordosis increases. The patients usually have difficulties standing up from a sitting position. Due to weakness in the gluteus medius muscle, the hip on the side of the swinging leg drops with each step (referred to as Trendelenburg sign). The gait appears waddling. The patients frequently attempt to counteract the dropping of the hip on the swinging side by bending the trunk towards the side which is in the stance phase (in the German language literature this is referred to as Duchenne sign). Similar gait patterns can be caused by orthopedic conditions when the origin and the insertion site of the gluteus medius muscle are closer to each other than normal, for instance due to a posttraumatic elevation of the trochanter or pseudarthrosis of the femoral neck.
Broad-based gait
MedGen UID:
167799
Concept ID:
C0856863
Finding
An abnormal gait pattern in which persons stand and walk with their feet spaced widely apart. This is often a component of cerebellar ataxia.
Myopathy
MedGen UID:
10135
Concept ID:
C0026848
Disease or Syndrome
A disorder of muscle unrelated to impairment of innervation or neuromuscular junction.
Muscle weakness
MedGen UID:
57735
Concept ID:
C0151786
Finding
Reduced strength of muscles.
Proximal muscle weakness
MedGen UID:
113169
Concept ID:
C0221629
Finding
A lack of strength of the proximal muscles.
Distal muscle weakness
MedGen UID:
140883
Concept ID:
C0427065
Finding
Reduced strength of the musculature of the distal extremities.
Skeletal muscle atrophy
MedGen UID:
892680
Concept ID:
C0541794
Pathologic Function
The presence of skeletal muscular atrophy (which is also known as amyotrophy).
Neck flexor weakness
MedGen UID:
334801
Concept ID:
C1843637
Finding
Weakness of the muscles involved in neck flexion (sternocleidomastoid, longus capitus, longus colli, and scalenus anterior).
Proximal amyotrophy
MedGen UID:
342591
Concept ID:
C1850794
Disease or Syndrome
Amyotrophy (muscular atrophy) affecting the proximal musculature.
Elevated circulating creatine kinase concentration
MedGen UID:
69128
Concept ID:
C0241005
Finding
An elevation of the level of the enzyme creatine kinase (also known as creatine phosphokinase (CK; EC 2.7.3.2) in the blood. CK levels can be elevated in a number of clinical disorders such as myocardial infarction, rhabdomyolysis, and muscular dystrophy.
Hypernasal speech
MedGen UID:
107884
Concept ID:
C0566620
Finding
A type of speech characterized by the presence of an abnormally increased nasal airflow during speech.

Recent clinical studies

Etiology

Gamez J, Armstrong J, Shatunov A, Selva-O'Callaghan A, Dominguez-Oronoz R, Ortega A, Goldfarb L, Ferrer I, Olivé M
J Neurol Sci 2009 Feb 15;277(1-2):167-71. Epub 2008 Nov 22 doi: 10.1016/j.jns.2008.10.019. PMID: 19027924Free PMC Article

Diagnosis

Foroud T, Pankratz N, Batchman AP, Pauciulo MW, Vidal R, Miravalle L, Goebel HH, Cushman LJ, Azzarelli B, Horak H, Farlow M, Nichols WC
Neurology 2005 Dec 27;65(12):1936-40. doi: 10.1212/01.wnl.0000188872.28149.9a. PMID: 16380616
Korényi-Both A, Korényi-Both I
J Med 1987;18(2):93-107. PMID: 3323392

Clinical prediction guides

Gamez J, Armstrong J, Shatunov A, Selva-O'Callaghan A, Dominguez-Oronoz R, Ortega A, Goldfarb L, Ferrer I, Olivé M
J Neurol Sci 2009 Feb 15;277(1-2):167-71. Epub 2008 Nov 22 doi: 10.1016/j.jns.2008.10.019. PMID: 19027924Free PMC Article
Foroud T, Pankratz N, Batchman AP, Pauciulo MW, Vidal R, Miravalle L, Goebel HH, Cushman LJ, Azzarelli B, Horak H, Farlow M, Nichols WC
Neurology 2005 Dec 27;65(12):1936-40. doi: 10.1212/01.wnl.0000188872.28149.9a. PMID: 16380616
Nakano S, Engel AG, Waclawik AJ, Emslie-Smith AM, Busis NA
J Neuropathol Exp Neurol 1996 May;55(5):549-62. doi: 10.1097/00005072-199605000-00008. PMID: 8627346

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