Inguinal lymphangioma in an adult patient mimicking an irreducible inguinal hernia: A case report

Introduction

Lymphangiomas are rare benign vascular malformations of the lymphatic system. They are usually located in the head, neck, and axilla and are typically present during the first two years of life. A few cases of inguinal lymphangioma have been reported in adults.

Case presentation

We report a 35-year-old male who presented with left groin swelling for a one-year duration associated with on and off pain. On examination, he had soft, irreducible left inguinal swelling with positive cough impulse and no tenderness on palpation. Ultrasound (US) and magnetic resonance imaging (MRI) were done for him, showing a well-defined lobulated cystic lesion located between subcutaneous and deep fascia measuring around 6.5 × 4.2 × 8.1 cm with multiple internal septations. The lesion shows Low signal intensity in the T1 weighted image and high signal intensity in the T2 weighted image. 97 % alcohol was injected under US guidance and aspirated after 30 min. The swelling significantly decreased in size clinically and radiologically during the follow-up.

Clinical discussion

Lymphangioma rarely occurs in the inguinal region, presenting a diagnostic challenge as it mimics various inguinal conditions. Differential diagnoses include inguinal hernia, hydrocele of the cord, lymphadenopathy, or hematoma. Imaging is used to determine the size, invasion, relation to surrounding structures, and extension to the abdominal cavity. MRI is the diagnostic modality of choice in non-emergency settings. Complete surgical excision is the gold standard for the management with the lowest risk of recurrence. Alternative non-surgical treatment options have been used successfully in poor surgical candidates. Different sclerosing agents have been used with low complications and rates of recurrence. Ethanol is a widely available sclerosing agent, and it was used with no recurrence or side effects during the follow-up period.

Conclusion

Surgeons should have a high index of suspicion when investigating any inguinal mass, considering such a rare presentation as part of the differential. Sclerotherapy is an effective treatment for lymphangioma and should be considered as an alternative modality in non-surgical candidates.