Granular cell tumor
(Redirected from Granular cell myoblastoma)
Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
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Granular cell tumor | |
---|---|
Synonyms | Abrikossoff's tumor |
Pronounce | N/A |
Specialty | N/A |
Symptoms | Usually asymptomatic, may present as a painless nodule |
Complications | Rarely malignant transformation |
Onset | Can occur at any age, most common in adults |
Duration | Persistent unless surgically removed |
Types | N/A |
Causes | Unknown |
Risks | Neurofibromatosis, African American ethnicity |
Diagnosis | Biopsy and histopathology |
Differential diagnosis | Schwannoma, lipoma, neurofibroma |
Prevention | None known |
Treatment | Surgical excision |
Medication | None specific |
Prognosis | Excellent if benign, guarded if malignant |
Frequency | Rare |
Deaths | N/A |
Granular cell tumor is a type of neoplasm that is typically benign, but can occasionally be malignant. It is characterized by the presence of large cells with granular cytoplasm. These tumors can occur anywhere in the body, but are most commonly found in the skin, oral cavity, and breast.
Etiology[edit | edit source]
The exact cause of granular cell tumors is unknown. However, they are believed to originate from Schwann cells, which are cells that produce the protective myelin sheath covering nerve fibers.
Clinical Presentation[edit | edit source]
Granular cell tumors typically present as painless, firm nodules that are less than 3 cm in diameter. They can occur at any age, but are most common in middle-aged adults. There is a slight female predominance, and they are more common in people of African descent.
Diagnosis[edit | edit source]
Diagnosis of a granular cell tumor is typically made through a biopsy of the lesion. Histologically, the tumor cells are large and polygonal, with abundant granular eosinophilic cytoplasm. The granules are positive for Periodic acid-Schiff (PAS) staining, which is indicative of the presence of lysosomes.
Treatment[edit | edit source]
Treatment for granular cell tumors typically involves surgical excision. In cases where the tumor is malignant, additional treatments such as radiation therapy or chemotherapy may be necessary.
Prognosis[edit | edit source]
The prognosis for individuals with granular cell tumors is generally good, as the majority of these tumors are benign. However, malignant granular cell tumors can be aggressive and have a poorer prognosis.
See Also[edit | edit source]
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Contributors: Prab R. Tumpati, MD