# Aspergillosis Clinical Spectrum > Aspergillosis clinical spectrum for NEET-PG Medicine: aspergilloma, chronic pulmonary and invasive disease, halo and air crescent signs, antifungal choice. - Canonical URL: https://prepelephant.com/topics/neet-pg/medicine/aspergillosis-clinical-spectrum - Exam / course: NEET-PG · Subject: Medicine - Publisher: PrepElephant (https://prepelephant.com) — Prepared and reviewed by the PrepElephant Academic Review Team - First published: 2026-10-08 - Last updated: 2026-10-08 - Reference basis: Harrison's Principles of Internal Medicine; Murray and Nadel's Textbook of Respiratory Medicine; Infectious Diseases Society of America Guidelines for Aspergillosis - How to cite: "Aspergillosis Clinical Spectrum", PrepElephant, https://prepelephant.com/topics/neet-pg/medicine/aspergillosis-clinical-spectrum ## Direct answer Aspergillosis spans a spectrum from allergic disease through saprophytic colonisation to invasive infection, and its form depends on host immunity and the pre-existing lung. Aspergilloma is a fungus ball within a pre-formed cavity, often left by old tuberculosis, chronic pulmonary aspergillosis is a slowly progressive cavitary disease in mildly immunocompromised hosts, and invasive aspergillosis is an angioinvasive emergency in neutropenic or transplant patients. CT imaging and serum galactomannan guide diagnosis, and treatment ranges from observation to voriconazole or surgical resection. ## What you must remember - **Aspergilloma:** a fungus ball in a pre-existing cavity, most often from tuberculosis; haemoptysis is its main complication and the commonest reason for intervention. - **Air crescent sign:** a crescent of air separating the fungus ball from the cavity wall, characteristic of aspergilloma. - **Chronic pulmonary aspergillosis:** progressive cavitation and fibrosis over months, with weight loss, fever and cough; diagnosis needs symptoms for more than three months with radiological change and a positive Aspergillus IgG. - **Invasive aspergillosis:** seen in neutropenia, prolonged corticosteroids and transplantation; angioinvasion causes nodules with a halo sign on CT. - **Serum galactomannan:** supports invasive disease but can be falsely positive with piperacillin-tazobactam and some other antibiotics. - **Treatment:** voriconazole is first-line for invasive disease, itraconazole is used for chronic forms, and liposomal amphotericin B is an alternative. - **Surgery:** resection is considered for aspergilloma with severe or recurrent haemoptysis when lung function allows. ## Two patients with cavities A 45-year-old diabetic farmer with prior tuberculosis has eight months of cough, weight loss and recurrent streaks of haemoptysis. His chest film shows an upper lobe cavity with a mobile opacity inside, and CT demonstrates an air crescent around the fungus ball. Contrast this with a 30-year-old on high-dose steroids for lupus who develops fever, pleuritic pain and a new nodule with a halo of ground-glass. Serum galactomannan is positive, and this is invasive pulmonary aspergillosis until proven otherwise. 1. **Aspergilloma:** The diagnosis is aspergilloma, and the immediate task is controlling haemoptysis with tranexamic acid and assessing bleeding risk. 2. **Resection threshold:** Surgical resection is considered if bleeding becomes severe, while a stable patient may be followed. 3. **Invasive start:** Voriconazole is started without delay, because angioinvasive disease in an immunosuppressed host progresses rapidly. 4. **Response check:** Repeat imaging after several weeks of antifungal therapy shows whether the nodule is regressing. 5. **Stable cavity:** A stable cavity may simply be followed rather than treated aggressively. The same mould produces both pictures, so the host and the pre-existing lung decide the clinical course. ## Where the exam tries to catch you Four traps recur on this topic. - **Trap:** treating the halo sign as specific to aspergillosis. — **Correct:** other angioinvasive infections such as mucormycosis produce it too, so the stem must be read with the host. - **Trap:** confusing aspergilloma with invasive disease. — **Correct:** aspergilloma is not invasive and rarely needs urgent antifungal treatment. - **Trap:** choosing amphotericin B first-line for invasive aspergillosis. — **Correct:** voriconazole is preferred. - **Trap:** reading raised IgE with central bronchiectasis as chronic pulmonary aspergillosis. — **Correct:** allergic bronchopulmonary aspergillosis is a separate entity driven by IgE and eosinophilia in asthma. In India, the post-tuberculosis cavity is the commonest setting for aspergilloma, which makes a history of treated tuberculosis a clue in many stems. ## Frequently asked questions ### What radiological sign is characteristic of an aspergilloma? The air crescent sign, a crescent of air separating the fungus ball from the wall of a pre-existing cavity, is characteristic of aspergilloma. It is most often seen in cavities left by old tuberculosis. ### Which findings help diagnose chronic pulmonary aspergillosis? Chronic pulmonary aspergillosis is diagnosed by symptoms for more than three months, radiological cavitation or fibrosis, and a positive Aspergillus IgG or culture after other causes are excluded. It typically affects patients with prior tuberculosis or chronic lung disease rather than severely immunosuppressed hosts. ### What is the first-line treatment for invasive pulmonary aspergillosis? Voriconazole is the first-line treatment for invasive pulmonary aspergillosis, with isavuconazole and liposomal amphotericin B as alternatives. Early treatment matters because angioinvasive disease in neutropenic patients progresses rapidly. ### Why can serum galactomannan give a false-positive result? Serum galactomannan can be falsely positive with piperacillin-tazobactam and some other antibiotics, and it can also be affected by cross-reacting fungi. A positive result therefore needs clinical and radiological correlation before antifungal therapy is started.