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Konomatsu K, Kakisaka Y, Sato S, Kubota T, Soga T, Ukishiro K, Jin K, Mugikura S, Aoki M, Nakasato N. "Caterpillar sign" in corpus callosum associated with curvilinear pericallosal lipoma in MRI: A case report. Radiol Case Rep 2024; 19:2058-2061. [PMID: 38523692 PMCID: PMC10958131 DOI: 10.1016/j.radcr.2024.02.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 02/09/2024] [Accepted: 02/15/2024] [Indexed: 03/26/2024] Open
Abstract
Lipoma of the corpus callosum, also known as pericallosal lipoma, is a rare congenital brain abnormality associated with corpus callosum dysgenesis or agenesis. Two morphological types are described: tubulonodular and curvilinear, with the latter being mostly asymptomatic. We present the case of a 30-year-old woman with epilepsy, whose magnetic resonance imaging revealed a "caterpillar sign" in the corpus callosum associated with a curvilinear pericallosal lipoma. The "caterpillar sign" in the corpus callosum showed low signal intensity on magnetization prepared rapid acquisition with gradient echo, high signal on fluid-attenuated inversion recovery, and low on susceptibility-weighted imaging, possibly indicating abnormal blood vessels penetrating from the ventricle to the posterior callosal vein. We need to be conscious of this unusual finding, particularly when considering surgical intervention in the corpus callosum in cases of pericallosal lipoma, to avoid vascular complications.
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Affiliation(s)
- Kazutoshi Konomatsu
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
- Departments of Neurology Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Yosuke Kakisaka
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Shiho Sato
- Departments of Diagnostic Radiology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Takafumi Kubota
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
- Departments of Neurology Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Temma Soga
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
- Departments of Neurology Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Kazushi Ukishiro
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Kazutaka Jin
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Shunji Mugikura
- Division of Image Statistics, Tohoku Medical Megabank Organization, Sendai, Miyagi, Japan
| | - Masashi Aoki
- Departments of Neurology Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Nobukazu Nakasato
- Departments of Epileptology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
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Al-Hameed M, Zaki-Metias KM, Deeb F, Shah KA. Atypical Mixed Variant of Pericallosal Lipoma With Splenial Dysgenesis. Cureus 2020; 12:e11532. [PMID: 33354476 PMCID: PMC7746315 DOI: 10.7759/cureus.11532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Pericallosal lipomas are rare benign intracranial masses that arise during embryonic development, typically categorized into tubulonodular and curvilinear subtypes. A mixed variant of both tubulonodular and curvilinear subtypes is very rare. Patients with pericallosal lipomas may be asymptomatic or may have different presentations, such as headaches. Conservative medical management is the mainstay of therapy for those without epileptic seizures or associated vascular malformations. We present a case of a mixed variant pericallosal lipoma in a patient with chronic headaches that were diagnosed using head computed tomography (CT) and brain magnetic resonance imaging (MRI).
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Jakkani RK, Reddy KK, Satyanarayan S, Suryanarayana A, Ramineni KK. Pericallosal lipoma masquerading as venous thrombosis on magnetic resonance imaging. Neurol India 2018; 66:1846-1847. [PMID: 30504604 DOI: 10.4103/0028-3886.246253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Ravi K Jakkani
- Department of Radiology, Yashoda Superspeciality Hospital, Malakpet, Hyderabad, Telangana, India
| | - K Krishna Reddy
- Department of Neurology, Yashoda Superspeciality Hospital, Malakpet, Hyderabad, Telangana, India
| | - Sandeep Satyanarayan
- Department of Radiology, Yashoda Superspeciality Hospital, Malakpet, Hyderabad, Telangana, India
| | - A Suryanarayana
- Department of Radiology, Yashoda Superspeciality Hospital, Malakpet, Hyderabad, Telangana, India
| | - Kiran K Ramineni
- Department of Neurology, Yashoda Superspeciality Hospital, Malakpet, Hyderabad, Telangana, India
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