This episode examines fungal infections that extend beyond the epidermis into subcutaneous tissue. Drawing from Murray’s Chapter 63, it explores how environmental fungi enter through traumatic implantation rather than inhalation.

Unlike superficial mycoses, subcutaneous infections often follow penetrating injury - thorns, splinters, soil contamination. Organisms such as Sporothrix schenckii and agents of chromoblastomycosis establish chronic, localised infections.

Clinical patterns include:

* Nodular lesions at the site of entry

* Lymphatic spread forming ascending nodules

* Chronic granulomatous inflammation

These infections typically remain regionally confined but may require prolonged antifungal therapy.

Conceptually, subcutaneous mycoses illustrate environmental exposure intersecting with tissue vulnerability. Clinically, history of trauma and occupational exposure becomes diagnostically central.

Key Takeaways

* Infection follows traumatic implantation

* Lesions are often nodular and chronic

* Lymphatic spread may occur

* Granulomatous inflammation is common

* Prolonged therapy is often required

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